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| 1. |
Chemical‐bonding aspects of heterogeneous catalysis. I. Chemisorption by metals and alloys |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 101,
Issue 4,
1982,
Page 121-136
R. A. van Santen,
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ISSN:0165-0513
DOI:10.1002/recl.19821010401
出版商:WILEY‐VCH Verlag
年代:1982
数据来源: WILEY
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| 2. |
Semi‐empirical calculations concerning the geometry of the cycloheptatrienyl anion |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 101,
Issue 4,
1982,
Page 137-141
A. W. Zwaard,
A. M. Brouwer,
J. J. C. Mulder,
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摘要:
AbstractSemi‐empirical calculations (mostly MINDO/3) have been performed on singlet C7H7−. A preference for planar structures is evident from the calculations. Two different structures (an allylic structure and a pentadienylic structure, respectively) are found as absolute minima on the potential surface. They were found to be second‐order Jahn‐Teller deformations of the highly symmetrical (D7h) structure, the energy lowering on these distortions being about 9 kcal/mole. A first‐order Jahn‐Teller effect was found to be negligible. The related C5H5+system is considered briefly for
ISSN:0165-0513
DOI:10.1002/recl.19821010402
出版商:WILEY‐VCH Verlag
年代:1982
数据来源: WILEY
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| 3. |
The electrochemical reduction of diazanaphthalenes; a spectro‐electrochemical investigation |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 101,
Issue 4,
1982,
Page 141-147
J. H. Wolsink,
A. Spaans,
D. M. W. van den Ham,
D. Feil,
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摘要:
AbstractThe electrochemical reduction of diazanaphthalenes in dimethylformamide at first‐ and second‐wave diffusion levels has been investigated by means of transmission spectro‐electrochemical methods. It has been found that the reaction of dianions with parent neutral molecules is an essential step in the reaction mechanism. Rate constants for all non‐electrochemical steps have been measured or estimated.Independent estimations of diffusion and absorbance coefficients are presented, as well as some principles of digital sim
ISSN:0165-0513
DOI:10.1002/recl.19821010403
出版商:WILEY‐VCH Verlag
年代:1982
数据来源: WILEY
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| 4. |
Biomimetic total synthesis of steroids VI. Stereospecific synthesis of 19‐nor‐8α‐steroids and 11α‐alkyl derivatives |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 101,
Issue 4,
1982,
Page 148-155
M. B. Groen,
B. Hindriksen,
F. J. Zeelen,
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摘要:
AbstractCationic cyclization of 2‐[6‐(3‐methoxyphenyl)‐(Z)‐3‐hexenyl]‐3‐methyl‐2‐cyclopentenol (7a) produced 1‐ and 3‐methoxy‐17‐methyl‐8α‐gona‐1,3,5(10),13(17)‐tetraene (8aand9a) with complete stereospecificity. Cyclization of similar substrates with an alkyl substituent in the appropriate position gave exclusively 11α‐alkyl derivatives of8aand9a. The products were converted into the corresponding 13α,17α‐epoxides by peracid oxidation and hence into derivatives of 8α‐estrone and 8α‐estradiol. 11α‐Methyl‐8α‐estra‐1,3,5(10)‐triene‐3,17(3‐diol (16b) was obtained i
ISSN:0165-0513
DOI:10.1002/recl.19821010404
出版商:WILEY‐VCH Verlag
年代:1982
数据来源: WILEY
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| 5. |
Communication to applicants for a grant from the Van 't Hoff fund in support of investigations in the field of pure and applied chemistry |
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Recueil des Travaux Chimiques des Pays‐Bas,
Volume 101,
Issue 4,
1982,
Page 156-156
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PDF (34KB)
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ISSN:0165-0513
DOI:10.1002/recl.19821010405
出版商:WILEY‐VCH Verlag
年代:1982
数据来源: WILEY
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