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Proceedings of the Chemical Society, Vol. 21, No. 302 |
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Proceedings of the Chemical Society, London,
Volume 21,
Issue 302,
1905,
Page 301-312
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摘要:
Issued 4/1/06 PROCEEDINGS OF 1 HE CHEMICAL SOCIETY. VOl. 21. No.302. Thursday, December 21st, 1905, at 8.30 p.m. Professor R. MELDOLA,F.R.S., President, in the Chair. Messrs. P. W. Robertson, Arthur Slator, J. I. Scott, and E. Towyn Jones were formally admitted Fellows of the Society. Certificates were read for the first time in favour of Messrs. : Thos. Going Stoney Bogue, 5, Kenilworth Square, Dublin. Stephen Lewis Courtauld, B.A., Bocking Place, Braintree. Henry Carlyle Irving, B.A.,14, Heath Hurst RoAd, Hampstead, N.W . John McDowall, Girdstingwood, Kirkcudbright, Scotland. John Parkin, M. A., Blaithwaite, Carlisle. William Hughes Perkins, B.Sc., Harpur Hill, near Buxton. Philip E’oale Rowsell, Nutbrook, Exmouth. John William Yates, B.Sc., 71, North Street, Hugglescote, near Leicester.A certificate has been authorised by the Council for presentation to ballot under Bye-Law I (3) in favour of : Hardolph Wastenays, of Brisbane, Queensland. Of the following papers, those marked * were read : 302 "218. "Azo-derivatives from methyl-a-naphthoooumarin," By John Theodore Hewitt and Herbert Victor Xitchell. Themethyl-a-naphthocoumarin,obt.ained by thecondensation of a-naph- tho1 and ethyl acetoacetate, when dissolved in hot caustic alkalis, yields alkali coumarinates, and if these solutions are cooled and treated with the solution of a diazonium salt, coupling takes place in the usual manner. On acidifying the solution, the corresponding azo- coumarin is precipitated, and in none of the four cases examined has the formation of an azocoumarinic acid been observed.The following substances have been prepared : benxemcazo. rnethylnaphthocourraarin (m. p. 207') ; o-nitrobenzeneaxomethyl naphthocoumccrin (M. p. 268') ; m-nits.obennxeneaxornet~ylnaphth0-coumarin (m. p. 239') ; p-nitrobennxeneaxomethylnaphthocourna!rin (m. p. 270-271'). The last of these compounds is remarkable in giving an intense blue coloration in alkaline solution, the alkaline salts derived from the other compounds being orange or red in aqueous solution. '219. '' The preparation and reactions of benzoyl nitrate." By Francis Ernest Francis. Lachowicz showed (Ber., 1884,17,1281) that when benzoyl chloride or other chlorides of the mono- and cli-basic organic acids interact with silver or other metallic nitrate<, decomposition into oxides of nitrogen and the corresponding organic anhydrides takes place.If,however, the interaction of benzoyl chloride with silver nitrate is eiX-ected at much lower temperatures, oxides of nitrogen are not evolved and benzoyl nitrate is formed : C,H,*COCl+ Ag*O*NO,=C,H,*CO*O*NO,+AgC1. The product is a light yellow oil which, if carefully warmed, decom- poses quantitatively into benzoic anhydride and oxides of nitrogen, but if heated with a free flame this change sets in with explosive violence, the yield of anhydride being much diminished. Benzoyl nitrate is very rapidly attacked by moisture with the forma- tion of benzoic and nitric acids.When kept at a low temperature either by itself or dissolved in an inert solvent, an interesting change into m-nitrobenzoic acid takes place without the formation of either the 0-or p-acid. Between 0' and -15", ethyl alcohol and the nitrate give ethyl nitrate, benzene and toluene are converted into their mononitro-derivatives, and phenetole and phenol undergo nitration quantitatively, 303 the product from the former being apparently o-nitrophenetole. Methyl- aniline is nearly quantitatively converted into phenylmet hylnitramine, and in all these reactions benzoic acid is simultaneously formed. Aniline, however, gives aniline nitrate and benzanilide. From these observations, it seems probable that benzoyl nitrate will prove to be generally applicable in effecting nitration at low temperatures and in the absence of water. "220."The supposed identity of dihydrolaurolene and of dihydroisolaurolene with 1 :1-dimethylhexahydrobenzene." By Arthur William Crossley and Nora Renouf. The hydrocarbons dihydrolaurolene and dihydroisolaurolene have been prepared according to the directions given by Zelinsky and Lepeschkin (Annulen, 1901, 319, 303) and their properties carefully compared with those of 1 : 1-dimethylhexahydrobenzene(Trans., 1905, 87, 1488). The above-mentioned authors supposed that these three substances were one and the same, but this is not so, for neither di- hydrolaurolene nor dihydroisolaurolene is identical with 1 : 1-dimethyl-hexahydrobenzene.The constitution of dihydrolaurolene is still doubtful, but clihydro- isolaurolene has been proved conclusively to be a pentamethylene derivative and is 1 :1 : 2-triinethylcydopentane. "221. The diazo-derivatives of 1 :5-and 1 : 8-benzenesulphonylnaph-thylenediamines." By Gilbert Thomas Morgan and Frances Mary Gore Micklethwait. The behaviour of the benzenesulphonyl derivatives of t.he 1 : 5-and 1 :8-naphthylcnediamines towards nitrous acid has been studied in order to ascertain whether these acylated heteronucleal diamines are capable of yielding diazoimides, and if so to compare the products with the reactive yellow arylsulphonylpuradiazoimidesand the inert colourless acylorthodinzoimides. BenxenesuEphonyl-1 :8-naphthylenediccmine (m.p. 166O), obtained by reducing benxeneszc~i~onyl-8-nitro-a-na~hthylccmd.ne(m. p. 194*), yields a soluble diazonium salt which, by the action of aqueous sodium acetate, gives rise to benxeneszclphonyl-1 :8-nuphthy Zenediuxoimide, Cl0H,:[N,]*S0,-C,H5 ; this product is a well-defined, crystalline, yellow diazomhydride com- parable in every respect with the paradiazoimides already described by the authors. This result indicates that the property of yielding these coloured diazoimides is not confined to the p-diamine series, and that the 304 characteristic physical and chemical properties of the products do not necessarily arise from the possession of a paraquinonoid configuration. as-Bcnxenesulphonyl-N -methyl- 1 :8-naphth ylenediamine and benxene- sulphonyl-1 : 5-7tap~thyZenediarin~furnish diazonium salts which are not appreciably affected by aq ueous sodium acetate.“222. u Further experiments on a new method of determining mole- cular weights.” By Philip Blackman. When working with solvents of high boiling point, the operations (Trans., 1905, 8’7,1474) must be carried out under reduced pressure, this reduction being effected by means of a filter pump. To prevent ejection of liquid or mixing, due to violent boiling, two bulbs, instead of one, should be introduced into each limb of the inverted U -piece. Most of the vapours condense in the bulbs; when a considerable quantity has thus collected in the bulbs, the volumes of the solutions in the test-tubes are observed, care being taken that the liquid in the bulbs does not flow back into the test-tubes during the reading.The liquid is then allowed to return into the tubes, the boiling is repeated, and a reading again taken. This process is repeated as often as is convenient. A condenser should riot be used. Instead of platinum wire, broken pieces of glass were employed. The method works best with volatile solvents, such as acetone (b. p. 56*5-57°), alcohol (96 per cent.), and benzene (b. p. 80-82O). *223. ‘‘ Studies in fermentation. The chemical dynamics of alcoholic fermentation by yeast.” By Arthur Slator. The chief results obtained may be summarised as follows : 1. In the study of the rate of alcoholic fermentation, many compli- cations are eliminated by measuring the velocity over very small ranges of the reaction.2. The change in pressure due to evolution of carbon dioxide is a convenienc and sensitive method of measuring this velocity. 3. The rate of fermentation of dextrose is proportional to the con- centration of yeast over a wide range of concentrations. 4. The rate is almost independent of the concentration of sugar except in very dilute solutions. The influence of this concentration is never so great that the velocity is proportional to the concentration of the sugar; the reaction is therefore never one of the first order with regard to the sugar. 305 5. The temperature-coefficient of the reaction is large, and varies with the temperature. Y&/V5=5.6, V'o/V30= 1.6, and intermediate values are obtained b etween these temperatures, The temperature quotient for 5' from 5' to 40' forms a series of numbers which seem to be characteristic of the enzyme zymase.6. The initial rates of fermentation of dextrose, lmulose, sucrose, and maltose are in the ratio 1 : 0.92 : 1.05 : 0.9. 7. The temperature-coefficient of the reaction inhibited by "poisons " is the same as that of the original reaction. 8. It is improbable that any but small quantities of sugar go through the intermediate step of lactic acid in fermentation. 5. These results indicate that the reaction which is measured in these experiments is the slow decomposition of a compound produced by the interaction of the enzyme and the sugar. "224."Some new platinocyanidea." By Leonard Angelo Levy and Henry Arnott Sisson. The authors described and gave the results of the analysis of hydrazine and hydroxylamine platinocyanides. These salts form unstable hydrates, which are easily produced by slight changes in temperature. The alteration in the state of hydration is accom-panied by striking colour changes. *225. ''An intramolecular change leading to the formation of naphthalene derivatives." By Ernest Francis Joseph Atkinson and Jocelyn Field Thorpe. Ethyl sodiocyanoacetate condenses with benzyl cyanide to form ethyl a-cyano-/3-imino-y-phenyZ-n-butyrate, Ph-CH,*C(:NH)*CH(CN) CO,Et, a colourless substance crystallising from alcohol in large prisms melting at 125O ; its constitution is proved by the fact that on hydrolysis with alcoholic potash it yields phenylacetic and malonic acids.The new imino-est,er (I),when treated with an equal weight of cold concentrated sulphuric acid, forms an intense green solution, which, when diluted with water and rendered alkaline with ammonia, gives ethyl 1 :3-dianainonuphthalene-2-carbolcyZate (11), forming intense yellow prisms melting at 104'. I. 11. 306 The hydrochloride forms colourless needles. Ethyl 1 :3-diamino-naphthalene-2-carboxylate, on treatment with met hyl-alcoholic potash, gives a potassium salt from an aqueous solution of which 1:3-di-aminonuphthulene-2-carboxylic acid (111) is precipitated on acidify- ing with acetic acid. /\/""'-I I, C:XH 111.IV. The acid forms slightly coloured needles froin warm water, which decompose at about 55", and when heated at this temperature until the evolution of carbon dioxide has ceased are transformed into 1:3-naphthylenediainine (IV)which, when recrystallised from dilute alcohol, forms small plates melting at 96". The diacetyl derivative forms needles from glacial acetic acid melting at 263O. DISCUSSION. In reply to questions from Drs. Forster and Morgan, Dr. THORPE stated that the reaction with cold sulphuric acid proceeded very rapidly and was complet,e after about one minute, the yield being practically quantitative. Hitherto the yield of ethyl a-cyano-/?-imino- y-phenyl-m-butyrate only amounted to 25 per cent., but by slightly altering the conditions of the experiment it was hoped that this amount would be largely increased. The temperature at which the condensation was carried out greatly influenced the quantity of the condensation product formed.226. "The relation of position isomerism to optical activity. V. The rotation of the menthyl esters of the isomeric dibromo- benzoic acids." By Julius Berend Cohen and Israel Hyman Zortman. In continuation of previous investigations on this subject (Trans., 1903,83,1213; 1904,85,1262, 1271; 1905,87, 1190), the present communication contains an account of certain physical constants, including the molecular rotations of the six isomeric menthyl dibromo- benzoates. With the exception of the 2 :6-ester, the effect on the rotation of the substitution of two bromine atoms is generally less than that of two chlorine atoms, or one chlorine and one bromine, in the same positions.The magnitude of the deviation, beginning with the ester of smallest rotation, is 2 : 6 ; 2 :3 ; 2 :5 ; 2 : 4 ;3 :5 ; 3 :4 ; 307 phenyl. The order is the same as that of the dichloro- and chloro- bromo-esters with the exception of the 3 :4-and 3 :$esters, the posi- tions of which in the present case are reversed. The influence of the ortho-bromine atom in depressing the rotation is very clearly indicated in all cases, but most strikingly in that of the 2 :6-esterY which shows a rotation of [M]r -195Ocompared with the next lowest (2 :3), which gives [M]r-173.Z0, or with menthyl benzoate, in which [M]ioois -236.3’. 227.‘‘Some derivatives of naphthoglbenzoic acid and of naphthacene-quinone.” By Jan Quiller Orchardson and Charles Weizmann. The authors have investigated a series of condensations which have resulfed in the preparation of substitution derivatives of naphthoyl-benzoic acid, and from these, by the action of concentrated sulphuric acid, they obtained the corresponding substituted naphthacenequinones. 228. Ethyl P-naphthoylacetate.” By Charles Weizmann and Ernest Basil Falkner. /I-Naphtlioicacid was converted intop-naphthoyl chloride,C,,H7*CO*C1, by treatment with phosphorus pentachloride, and this chloride was then allowed to react with the sodium derivative of ethyl acetoacetate. The ethyl P-naphthoylacetoacetate, Cl,H7*CO>CH*CO,Et, melted at 57”, andCH,*CO when digested with ammonia and ammonium chloride yielded ethyl P-naphthoybacetate, which melted at 34’ and gave rise to a hydi-axone (m.p. 95’). 229. ‘‘ Contributions to the chemistry of the amidines. 2-Amino-t hiazole s and 2-imino-2:3-dihydr othiazole s. 2-Iminotetrathi-azoles and 2-amino-4 :5-dihydrothiazoles.” By George Young and Samuel Irwin Crookes. It was shown that the alkylation of amidines belonging to the thiazole group which have one of the nitrogen atoms and the carbon atom of the group -N:C*N:, forming part of a closed chain, whilst the other nitrogen atom lies outside the cyclic nucleus, leads to the forma-tion of derivatives iu which the slkyl group is attached to the nitrogen atom of the nucleus, except when the ring is already partially reduced and an aryl group is attached to the nitrogen atom of the side-chain, to which, in this case, the alkyl group becomes attached.Methylation of an amidiiie takes place by addition of methyl iodide and subsequent elimination of the hydrogen haloid. 308 The following substances were described : AcetyE-2-unilino-4-methylthiaxole, C,,H,N,SAc, forms clusters of soft, white needles (m. p. 114.5') ;2-phenylimino-3 :4-dimethyl-2 :3-CH-dihydrothiazole, I I '>C:NPh, separates in small, white crystals CMe*NMe (m.p. 65-66') and forms a platinichloride (m. p. 189-190'). 2-Allyk-amino-4-methylthiaxoZe,RH-'>C*NH*C,H,, crystallises in long, white CMe*N needles (m.p. 40-41O) and forms an acetyl derivative (m. p. 36-37'). CH-S2-AEZylimino-3 :4-dimethyl-2 :3-dihydrothiaxole, I I >C: N*C,H5,CMe*NMe is a slightly red, viscid oil which forms a hydriodide (m. p. 116-117'). The silver derivative of 2-acetylimino-4-methyl-2 :3-dihydrothiazole yields,on methylation, 2-acetylimino-3 :4-dimethyl-2 :3-dihydrothiazole (in. p. 113') ;2-methylamino-4-methylthiazole(m. p. 64') yields, on methylation, 2-methylimino-3 :4-dimethyl-2 :3-dihydrothiaxole hydr-iodide (m. p. 164O). 2-Phen ylimino-5-methyltetrah yd rot hiazole forms a silver derivative decomposing at 130' and an acetyl derivative melting at 47" ;2-phenyl-methylamino-5-methyl-4 :5-dihydrothiazole picrate forms soft, yellow needles (m. p.114--115') ;2phenyZethylarnino-5-methyl-4:5-dihydro-thiaxole, CHMe*S>C*NEtPh, is oily and forms a platinichloride decom- ICH,--N posing at 156'. A similar series of compounds, in which the p-and o-tolyl groups re- place the phenyl group of the foregoing substances, has also been prepared. When successively oxidised and hydrolysed, the 2-arylalkylamino-5- methyl-4 :5-dihydrothiazoles yield /3-methyltaurine, which melts at 284-285", and the corresponding arylalkylamine. 230. (( The action of water on diazo-salts." By John Cannell Cain and George Marshall Norman. The authors have extended the work already briefly described (Proc., 1905, 21, 206) to the examination of the diazo-salts from 2 :4-dibrornoaniline and dibromo-p-toluidine (CH, :NH2:Br :Br = 1:4:3 :5))and in each case were successful in obtaining the correspond- ing substituted phenols.The results of a series of researches carried out during the past four years by the author and his assistants have been summarised. 309 231. (‘Note on the atomic weight of nitrogen.” By Alexander Scott. By the titration of ammonium bromide against silver, the author (Trans.,1901, ’70,154) obtained results which differed notably from those of Stas, although the values from the chloride seemed to agree somewhat better. These values were : NH,Cl = 53.532 (Stas) 53.516 (Scott) N = 14.045 ( ,, ) 14.029 ( ,, ) NH,Br = 98.032 ( ,, ) 97.995 < )), N = 14.047 ( ,, ) 14.010 ( ,, ) Stas’ values for the atomic weight of nitrogen agree with one another, whilst those of the author do not. These values depend, however, on tho correctness of the atomic weights taken for chlorine and for bromine, which were assumed to be 35.457 for chlorine and 79.955 for bromine.By the recent determinations of T. W. Richards and R. C. Wells (“Arevision of the atomic weights of sodium and chlorine,” 1905), published by the Carnegie Institution of Washington, the want of agreement in the author’s values has been completely cleared up and the discrepancy (to an equal extent) transferred to the determinations made by Stas. They prove that C1= 35.473. The work of the author was criticised last year by T. W. Richards (Proc. Amel.. Phil. Xoc., 1904, 43, 116), who maintained that 14.01 was too low for the atomic weight of nitrogen, and at the end of his paper he states that “It seems probable that the atomic weight of nitrogen is not less than 14.02 and not over 14.04, probably being nearer to the latter value than to the former.” The physical work of Lord Rayleigh and of Leduc on this problem as well as the chemical and physical work of Guye and his co-workers and of R.W. Gray (Tmns., 1905, 87, 1601) all render the conclusions of Richards quite untenable. It is most interesting that the author’s critic should, by his own work, have brought the values of the author which are cited above completely into line with those of other recent workers. Using 35.473 instead of 35.457 for the atomic weight of chlorine as above, the author’s values for the atomic weight of nitro-gen become 14.013 from the chloride and 14.010 from the bromide.When it is remembered that only one gravimetric and two volumetric determinations were made with the chloride, closer agreement could not be expected, and the value 14.010 deduced from the large number of experiments made with the bromide seems completely established. 310 With regard to the suggestion that the low value found by the author for the bromide was due to his hydrobromic acid containing chlorine, the results given in his paper on the preparation of pure hydrobromic acid (Trccns., 1900, ’77,651) are a sufficient answer. The bromine used was purified by the method given by Stas, by solution in potassium bromide with the addition of zinc oxide.It ought to have been stated that the silver used in experiment TI(6) (Trans., 1901, 79, 152) was cleaned by acid, as recommended by Richards, after fusion on lime and before it was heated in hydrogen. 232. The solubility of zinc hydroxide in alkalis.” By James Moir. When the precipitate of zinc hydroxide dissolves in excess of caustic alkali, the phenomenon is essentially an equilibrium between the nlkali and zincic acid, and this equilibrium may be reached from both sides : (1) addition of excess of zinc hydroxide to caustic alkali, and (2) dilution with water of a strong solution previously saturated with zinc hydroxide. In the latter case, some of the hydroxide is repre-cipitated and an equilibrium is slowly reached, which, as in the first case, depends solely on the concentration of the free alkali.Observations have been made on both lines over the range from ’iN to 0.01N alkali, below which the amount of zinc dissolved is insignificant, being little greater than that due to the solubility of zinc hydroxide in pure water. In addition, the author has succeeded in showing that the experimental results can be deduced from the ordinary assumptions of the ionic theory, 50 that it follows tbnt the solubility of zinc hydroxide in alkali depends solely on the concentra- tion of hydroxidion in the solution. It is also shown that no definite chemical compounds (such as ZnO,8KOH) exist, since the curve obtained by plotting the results is approximately a parabola, and its tangent never passes through the origin.A practical result of the investigation is to show that in working cyanide solutions scarcely any of the zinc is present as zincate, but nearly all is zincocyanide. The formula, giving the dissolved zinc in terms of the concentration of alkali, is y = 0.004~___ where y and x are expressed in gram- cp$6), molecules. The following list gives a comparison of calculated values of y with those obtained by interpolation from the experimental curves : 311 (lj 7.5~NaOH, x= 7.5,IJ calculated = 1.89, y observed = 1,692 7, 99(2)55N KOH, x=5*5 1.291, 1*36 I, 0.48(3) 2.5N NaOH, x=2.5 ?? 0.452, 7, 9,(4) 2.ON KOH, x=2*0 0.328, 0.33 9,(5) 1.5N KOH, x=1*5 0.2033, ,, 0.21 ,7(6) 1.3N NaOH, x=1*3 ?? 0.171, 0.17 9,(7) liV KOH, x=l 0.1132, ,, 0-110 (8) 0.5N NaOH, x=0.5 0.0364, ,, 0.0409, 99(9) 0.IN NaOH, x=0.1 040265, ,, 0.0035 99(10) 0-05X NaOH, x=O% 0*00097, ,, 0*0010 7,(11) O,OliV NaOH, x=O.O~ 0-000135, ,, 0*0002 The theoretical results are usually a little too low, which points to a small error in the value of the constants assumed ; but on the whole the agreement between theory and practice is as good as could be expected considering that the experiments were not made at absolutely constant temperature.This agreement cannot be fortuitous, and vindicates the correctness of the assumptions made at the beginning regarding the constitution of zincate solutions and the applicability of the ionic theory.They show also that the whole phenomenon is not one of the formation of definite chemical compounds, but is purely conditioned by the strength of the alkali. Some of the experimental results are abnormal, especially those ob- tained by diluting a strong saturated zincate solution. This effect is due to the persistence of the state of supersaturation. The reactions K2Zn02+ H20--+ KHZnO, +KOH -+ H,ZnO, + 2K OH have evidently slow velocities, nevertheless the hydrolysis is eventu-ally very complete, and, ultimately, the same result is obtained as if alkali of the final concentration had been treated with excess of zinc hydroxide. Zinc hydroxide, acting as zincic acid, has therefore a different constant of dissociation from its ordinary basic one, and, in fact, the constant of the equation (H’)(HZnOz’) =K.(HzZn02) is rather less than that of water, a fact which accounts for the extensive hydrolysis of the salts of zincic acid.233. (6 The slow combustion of carbon disulphide.” By Norman Smith. Experiments have been carried out in order to determine the com- position of the reddish-brown deposit formed when carbon disulphide and oxygen are passed through a heated tube (compare Turpin, Brit. dssoc. Reports, 1890, 776 ; Dixon and Russell, Trans., 1899, 75, 603). The deposit consists chiefly of an acidic compound CIGH,O,S,. Another acidic substance or substances containing less carbon and more sulphur 312 than the foregoing product, and very small quantities of free carbon and sulphur, are also found to be present.The silver and ammonium salts of the compound C1,H,0,S8 have been prepared. The gaseous products consist chiefly of sulphur dioxide with small amounts of carbon dioxide. At the next Ordinary Meeting, on Thursday, January 18th, 1906, at 8.30p.m., the following papers will be communicated : ‘‘The refractive indices of crystallising solutions with especial reference to the passage from the meta-stable to the labile condition.” By H. A. Miers and F. Isaac. “The determination of available plant food in soils by the use of weak acid solvents. Part 11.” By A. D. Hall and A. Amos. “ The action of ammonia and amines on diazobenzene picrate.” By0. Silberrad and G. Rotter.“The preparation of p-bistriazobenzene.” By 0. Silberrad and 5. J. Smart. “ Gradual decomposition of ethyl diazoacetate. ’’ By 0. Silberrad and C. S. Roy. “Studies on nitrogen iodide. Part 111. The action of methyl and benzyl iodides.” By 0. Silberrad and B. J. Smart. ‘‘Silicon researches. Part X. Silicon thiocyanate.” By J. E. Reynolds. “The relations between absorption spectra and chemical constitu- tion. Part I. The chemical reactivity of the carbonyl group.” By A. W. Stewart and E. C. C. Baly.‘‘ Halogen derivatives of substituted oxamides.” By F. D. Chattaway and W. H. Lewis. “ The effect of constitution on the rotatory power of optically active nitrogen compounds. Part I.” By Miss M. B. Thomas and H. 0. Jones. ‘‘Menthyl benzene sulphonate and menthyl-P-naphthalene sul-phonate.” By T. S. Patterson and J. Frew. ‘6 An apparatus for the continuous extractiou of liquids with ether.” By R. S. Bowman. “Action of bromine on benzeneazo-o-nitrophenol.” By J. T. Hewitt and N. Walker. R, CLAY AND SONS, LTD., BEEAD ST. HILL, E.C., AND BUNSAY, SUFFOLIC.
ISSN:0369-8718
DOI:10.1039/PL9052100301
出版商:RSC
年代:1905
数据来源: RSC
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