摘要:

In the short time since 1977, when it was discovered that vanadate is a potent inhibitor of the sodium pump (Na,K-ATPase), vanadium has become a valuable and widely used probe of enzyme function and mechanism. In the V(V) oxidation state, as diamagnetic vanadate, it mimics phosphate and interacts with a large class of phosphatases and phosphotransferases. In the V(IV) oxidation state, as paramagnetic vanadyl, it behaves as a transition metal ion and can replace other such ions in metalloproteins. Because the potentials of V(V) and V(IV) lie within limits tolerated by living systems, vanadium can also participate in many biological electron transfer reactions. The wide variety of effects reported in the literature that arc observed when vanadium is added exogenously to enzymes, cells and tissues can be largely explained by consideration of the principles of aqueous inorganic vanadium chemistry. The true role of endogenous vanadium in living systems remains obscure, however.

ISSN:0260-3594    

DOI:10.1080/02603598208078107

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The stereochemistry of transition metal complexes can be properly discussed by means of ligand field theory. It is stressed, however, that the RacahBandCparameters do not have a simple interpretation in the description of d-d repulsions.

ISSN:0260-3594    

DOI:10.1080/02603598208078108

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Structural as well as spectroscopic problems in condensed matter have been investigated by neutron scattering techniques which have proved to be a valuable method for the investigation of chemical problems. Most investigations were performed on crystalline solids, but more and more studies on amorphous material, solutions and adsorbed gases on surfaces are reported. The present article presents examples of structure determination, phase transitions, electron and magnetization densities, together with studies of molecular vibration and other results from neutron spectroscopy.

ISSN:0260-3594    

DOI:10.1080/02603598208078109

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Early developments in organotransition metal chemistry included the synthesis and reactions of hydrido and alkyl derivatives. The insertion of unsaturated reagents into M-C or M-H bonds was shown to be facilein many cases [Eqs. (1) and (2)1, and the reaction mechanisms were determined1–3.

ISSN:0260-3594    

DOI:10.1080/02603598208078110

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0260-3594    

DOI:10.1080/02603598208078106

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor