Abstract

This review summarizes experimental and theoretical studies of transition metal complexes with two types of novel metal-carbon bonds. One type features complexes with carbones CL2 as ligands, where the carbon(0) atom has two electron lone pairs which engage in double (σ and π) donation to the metal atom [M]⇇CL2. The second part of this review reports complexes which have a neutral carbon atom C as ligand. Carbido complexes with naked carbon atoms may be considered as endpoint of the series [M]-CR3 → [M]-CR2 → [M]-CR → [M]-C. This review includes some work on uranium and cerium complexes, but it does not present a complete coverage of actinide and lanthanide complexes with carbone or carbide ligands.

Highlights

  • Transition metal compounds with metal-carbon bonds are the backbone of organoTransition metal compoucnhdesmwistirtyh. mMeotlaelc-ucalersbownitbhoMnd-sC asriengtlheebboancdksbaornee aolrfeoadrgyankonmowetnalslincce 1849 when Fra chemistry

  • If the Lewis acid A has an occupied π orbital, it would lead to π repulsion with the π lone pair of the carbone CL2, whereby the repulsive interaction is reduced if L is a good π acceptor (Figure 1c)

  • This review summarizes in its second part the research in transition metal complexes with a naked carbon atom as ligand [M]-C that has been accomplished since 2002

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Summary

Introduction

Transition metal compoucnhdesmwistirtyh. mMeotlaelc-ucalersbownitbhoMnd-sC asriengtlheebboancdksbaornee aolrfeoadrgyankonmowetnalslincce 1849 when Fra chemistry. The first part of this review summarizes experimental and theoretical work about transition metal complexes with carbone ligands [M]-CL2. This review summarizes in its second part the research in transition metal complexes with a naked carbon atom as ligand [M]-C that has been accomplished since 2002. Selected transition metal compounds with the carbone 1a as two electron donor ligand; (a) MI, (b) CdI2, (c) UCl4, (d) Fe(N{SiMe3}2), (e) ZnI2. Transition metal complex with the carbone 1c as two and four electron donor ligand. Selected transition metal compounds with the carbone 1a as four electron donor ligand. Selected transition metal complex with the carbone 1e as two electron donor ligand.

C OSiMe3
31 P3311NPP MNNMRMRR
Carbodicyclopropenylidene
Carbodicarbenes
C Ag NMe
Conclusions

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