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Titolo:
THE COORDINATION CHEMISTRY OF MULTIDENTATE ISOCYANIDE LIGANDS
Autore:
HAHN FE;
Indirizzi:
FREE UNIV BERLIN,INST ANORGAN & ANALYT CHEM,FABECKSTR 34-36 W-1000 BERLIN 33 GERMANY
Titolo Testata:
Angewandte Chemie, International Edition in English
fascicolo: 5, volume: 32, anno: 1993,
pagine: 650 - 665
SICI:
0570-0833(1993)32:5<650:TCCOMI>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLAR-ENERGY STORAGE; HOMOLEPTIC CARBENE COMPLEXES; BIDENTATE ISONITRILE LIGAND; TRANSITION-METAL-COMPLEXES; X-RAY STRUCTURE; CRYSTAL-STRUCTURE; MOLECULAR-STRUCTURE; HYDROXYALKYL ISOCYANIDES; FUNCTIONAL ISOCYANIDES; DIISOCYANIDE LIGANDS;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
159
Recensione:
Indirizzi per estratti:
Citazione:
F.E. Hahn, "THE COORDINATION CHEMISTRY OF MULTIDENTATE ISOCYANIDE LIGANDS", Angewandte Chemie, International Edition in English, 32(5), 1993, pp. 650-665

Abstract

In spite of the excellent ligation properties of isocyanides, until afew years ago there was only a small number of known multidentate ligands of this type. One of the reasons for this lack of interest, when compared to monodentate isocyanides, was the linear arrangement of theM-C=N-R group, which usually inhibits the formation of mononuclear chelate complexes and leads to the formation of multinuclear or polymeric metal complexes. In these, the multidentate ligand acts in a monodentate fashion towards each metal atom. Only recently has a series of polyisocyanides with large ligand backbones been synthesized successfully. Bidentate isocyanides can bridge two metal atoms or react to give chelates with only one metal center. Tripodal ligands form mono- or binuclear complexes, in which the largest organometallic rings observed to date occur (up to 36 atoms). This class of ligands promises to be interesting for the synthesis of stable, diagnostically important technetium complexes of the type [Tc(CNR)6]+. There also appear to be applications for tripodal isocyanides in catalysis. A facial, chiral Cr(CNR)3 unit might be able to catalyze the hydrogenation or isomerization of prochiral double bonds. It is even possible to bind triisocyanides with suitable backbones to carbonyl trimetal clusters, thereby stabilizing them, or making selective cluster formation possible. Coordinated isocyanides can be transformed readily into carbene ligands, which, inthe future, could lead to complexes with polycarbene ligation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 01:31:25