Alkyne-bridged clusters

Deprotonation of the alkyne-bridged clusters [RuCo2(CO)9( U3-RC=CH)] (lOOa-d) with triethylamine and further reaction with the organometallic halides [Cp(CO)2FeCl] (101), [Cp(CO)2RuCl] (102), [Cp(PPh3)NiCl] (103) and [Cp(CO)3 MoCl] (104) in presence of catalytic amounts of copper(I) iodide results in... 

Triangular trinuclear systems in which the alkyne bridges two of the three metals have been prepared by reaction of preformed clusters with alkynes, as in Eq. (13),128... 

This cluster, which is a chiral example of the large class of alkyne bridged trinuclear clusters, is obtained from the ternary metal carbonyl RuCo2(CO)i by a two-step sequence involving a capping reaction and a metal exchange, with an overall average yield of 42% ... 

PPhs, R - H, Et, Ph) . The synthesis and molecular structure of the alkyne-bridged mixed-metal butterfly cluster [Co2Rh2-( i-CO) 2(CO) 7 (m4-ti -HC2Bu") (PPhs) 3 have been achieved . The... 

The CC triple bond of the bridging alkyne of cluster (30) is cleaved in a reversible decarbonylation to form the bis-alkylidyne (31). Two molecules of HCCH are incorporated into a ligand in a photochemical reaction of Cp(0C)2Mo( rPPh2)( U"H)Mn(CO)4. A rare U3 ri roethylenearsanediyl complex is formed in the reaction of PPh3=CH2 with the M3-AS cluster As[Mo(CO)2Cp]3. 

A third class of clusters has the alkyne bridging one face of an RU4 puckered square and a main group element fragment capping the opposite face. The alkyne may be bound in the familiar mode as found in [Ru4(/t4-... 

Reactions of alkynes with trinuclear group 6-group 9 clusters incorporating bridging alkylidyne ligands proceeded by coupling the C-donor ligands. 

In organometallic systems in particular, clusters with bridging alkylthiolates are well known, as exemplified by Co2(Cp)2(/i-SCH3)2, which undergoes reactions with alkyne-cobalt complexes to yield trinuclear clusters.170... 

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