摘要:

AbstractThe formation of 1 : 2 titanium(III) complex with chromotropic acid (4, 5‐dihydroxy‐2, 7‐naphthalene‐disulfonic acid) was observed by spectrophotometric measurements at various ionic strengths. An expression, [Ti(III)]/D=1/Δϵ + αH2+/KΔϵ[H2R2−]2, was derived for the determination of the formation constant,K=7.2×102liter2mol−2for the Ti(III).(HR)2ion in thepH range of 1.3–1.8 at constant ionic strength,I=0.2M, at 25°C. The thermodynamic data for the reaction, Ti(III)+2H3R2−=Ti(III) (HR)2+2H+, were calculated to beΔG° = −16 kJ mol−1ΔH° = 18 kJ mol

ISSN:0009-4536    

DOI:10.1002/jccs.197400011

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractThe normal vibrations of tetrahedral hydride and octahedral hexafluoride have been studied in the Cartesian coordinates. Equations relating the force constants with the vibrational frequencies are derived by using symmetry coordinates. Numerical values of the force constants and normal coordinates of these molecules are tabulated.

ISSN:0009-4536    

DOI:10.1002/jccs.197400012

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractNeutron irradiation was carried out on 0.2, 0.4 and 0.7Msolutions of potassium hexacyanoferrate(II) at thepH range of 2‐10. Fe(CN)51−was found whenpH<5; which is consistent with the oxidation potential consideration of the slow reaction between Fe(CN)54−and OH. Fe(OH), was precipitated in the whole range ofpH studied. Chemical and radiochemical yields were com

ISSN:0009-4536    

DOI:10.1002/jccs.197400013

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractThe neutron irradiated potassium hexacyanoferrate(III) solutions were analyzed for Fe(CN)64−, Fe(CN)63−, and Prussian blue. The retention values (1.1%) were constant throughout thepH and concentration ranges studied, and did not change with the length of irradiation. The complex behavior of the radiochemical yield of the Fe(CN)64−and Prussian blue was attributed to the competition of the various reactions involved in the irradi

ISSN:0009-4536    

DOI:10.1002/jccs.197400014

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractBy the addition of equivalent amount of appropriate amine on the carbon‐carbon double bond ofN‐substituted maleamic acids under the influence of pyridine, a number of potential hypocholesteremics,N,N2‐disubstitutedDL‐β‐asparagines was prepared. For allN‐alkyl‐ andN‐arylmaleamic acids, the addition proceeded smoothly and resulted in satisfactory yields, but in the cases ofN‐heterocyclic analogs, transamidation was observed to occur simultaneously with the

ISSN:0009-4536    

DOI:10.1002/jccs.197400015

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

Abstract1 : 2 complexes of lanthanum with maleic and citraconic acids have been reported. Conductance and spectrophotometric data obtained from Job's method of continued variation has been used for the determination of the composition and the values for the dissociation constants of these complexes. The dissociation constants were found to be 1.60×10−5and 2.00×10−5respectively for the maleate and the citraconate comp

ISSN:0009-4536    

DOI:10.1002/jccs.197400016

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY

摘要:

AbstractRuthenium(III) complexation with 2‐amino‐3‐hydroxpyridine is studied spectrophotometrically. The violet‐red complex (λmax520nm; ϵ 4460) contains metal and the ligand in 1 : 1 molar ratio, adheres to Beer's law from 0 to 16.5µg/mlof ruthenium concentration and shows maximum and constancy in absorbance betweenpH 5.3 and 6.5. The complexation is used in the spectro‐photometric determination of ruthenium in coexistence with several ions including some from pla

ISSN:0009-4536    

DOI:10.1002/jccs.197400017

出版商:WILEY‐VCH Verlag    

年代:1974

数据来源: WILEY