REACTIONS OF THE PENTANUCLEAR MIXED-METAL CLUSTER COMPOUND [RU4RHC(CO)12(ETA(5)-C5ME5)] - SYNTHESIS, CHARACTERIZATION AND CRYSTAL-STRUCTUREOF THE PENTANUCLEAR DERIVATIVE [RU4RHC(CO)11H(ETA(5)-C5ME5)I]
T. Adatia et al., REACTIONS OF THE PENTANUCLEAR MIXED-METAL CLUSTER COMPOUND [RU4RHC(CO)12(ETA(5)-C5ME5)] - SYNTHESIS, CHARACTERIZATION AND CRYSTAL-STRUCTUREOF THE PENTANUCLEAR DERIVATIVE [RU4RHC(CO)11H(ETA(5)-C5ME5)I], Journal of the Chemical Society. Dalton transactions, (7), 1994, pp. 1109-1113
Treatment of the pentanuclear cluster [Ru4RhC(CO)12(eta5-C5Me5)] 1 wit
h an excess of [NEt4][BH4] yielded the monoanion [Ru4RhC(CO)11H (eta5-
C5Me5)] - which has been isolated as its [NEt4]+ salt 2. Reaction of t
he monoanion with iodine solution gave the novel derivative [Ru4RhC(CO
)11H(eta5-C5Me5)I] 3. Compound 3 crystallises in the monoclinic space
group P2(1)/n with a = 1 5.243(3), b = 18.683(3), c = 10.425(2) angstr
om, beta = 90.0(2)-degrees. The five metal atoms adopt a wingtip-bridg
ed butterfly arrangement with the rhodium forming one of the 'hinge' a
toms [Ru-Ru 2.816(1)-2.899(1), Ru-Rh 2.816(1)-2.826(1) Al. The parent
cluster [Ru4RhC(CO)12(eta5-C5Me5)] 1 reacted at room temperature with
the neutral ligands P(OMe)3 and PPh3 to yield compounds [Ru4RhC(CO)10{
P(OMe)3}2(eta5-C5Me5)] 4 (three isomers) and (Ru4RhC(CO)10(PPh3)2(eta5
-C5Me5)] 5. Compound 1 reacts with [N(PPh3)2]Cl to yield the adduct [R
u4RhC(CO)12(eta5-C5Me5)Cl]- which on protonation produces [Ru4RhC(CO)1
2H(eta5-C5Me5)Cl] 6.