Derivatives of the closo-Ru4C2 cluster

Reactions of Ru3(CO)10(NCMe)2 with ethyne: molecular structures of some prototypical cluster complexes

“…Complex 4 is similarly the prototype of many related compounds. The first of these was obtained from C 2 Ph 2 20 and its molecular structure was described in 1977. 21 Formal addition of an Ru(CO) 3 fragment to 2 to give 4 is accompanied by reversion of the H atom from the cluster to the alkynyl group to reform the alkyne.…”

Alkyne-substituted homo- and heterometallic carbonyl clusters of the iron, cobalt and nickel triads

“…127 Further substitution with alkyne of the above structures leads to flattened butterflies, or nearly squareplanar structures with two independent alkynes, e.g., Ru^CO^RCzRMR'CaR"). 130 The structure of these complexes has been hypotheszied; whereas an iron homologue, Fe4(CO)u(HC2Et)2 (28), has been studied by X-ray diffraction.125 Also in this complex a -172 (0x-o-x) bonding mode is observed for each alkyne unit.…”

Polynuclear Ruthenium Carbonyl Complexes

“…46 Additional alkyne reacts readily to give 50-60% yields of [Ru 4 (CO)n(PhC 2 R')-(PhC 2 R")] (R = R' = Ph, R" = Me or Et; R = Ph, R' = R" = Me), for which several structures, including (17), have been suggested. The structure of [Ru 4 (CO)i 2 (C 2 Ph 2 )] (16) resembles those of the complexes discussed above.…”