An electron-rich olefin as a source of co-ordinated carbene; synthesis of trans-PtCl₂[C(NPhCH₂)₂]PEt₃

Abstract

Sziinmary Interaction of the appropriate electron-rich WE have examined the possibility of preparing transitionolefin and chloride bridged RX1 dimer has yielded the metal carbene complexes using neutral precursors as sources unreactive hans-Pt.ll carbene complex (I) which is of the organic ligand. (For previous synthesis see ref. 1 believed to isomerise thermally to the cis-isomer; the and 2, and possible trapping experiments, ref. 3 and 4.) structure of the trans-coniplex is established inter alia by a Di-~-chlorodichlorobis(triethylphosphine)diplatinum( 11) is single crystal X-ray analysis.known to react readily with ligands, forming mononuclear

Contributions to the chemistry of carbenemetal chemistry

“…Such studies on carbenemetal complexes and related chemistry were particularly vigorously pursued in the period 1971 (cf. the first publication [5]) to 1985. We reviewed transition metal carbene complexes in 1972 [6], their role as reaction intermediates in 1973 [7], optically active EROs and their metal complexes in asymmetric synthesis and catalysis in 1981 [8], and the coordination chemistry of nucleophilic carbenes (and dialkylstannylenes) in 1975 [9] and of EROs in 1988 [10].…”

Functionalised Saturated‐Backbone Carbene Ligands: Yttrium and Uranyl Alkoxy–Carbene Complexes and Bicyclic Carbene–Alcohol Adducts

“…It should be noted, however, that saturated NHC complexes were also studied in Lapperts original work on the synthesis of metal carbene complexes from electron-rich olefins, for example in the synthesis of trans-[PtCl 2 {CA C H T U N G T R E N N U N G (NPhCH 2 ) 2 }PEt 3 ]. [11] Nolan has examined the differences between saturated and unsaturated NHCs in Group 10 complexes by analysing the stretching frequency in [(NHC)Ni(CO) 3 ] adducts. He finds that within the group, the s-donor properties of unsaturated and saturated NHCs are almost the same.…”

Synthesis of silver(I) and palladium(II) N-heterocyclic carbene complexes and their use as catalysts for the direct C5 arylation of heteroaromatic compounds

“…After these initial reports, most chemists except Lappert et al [3] directed little attention toward NHC ligands for the next two decades. The isolation of the first stable NHC species in 1991 by Arduengo [4] and utilization of NHC complexes in catalysis led to a renewed interest in NHC chemistry.…”