Xj. Lei et al., Synthesis and characterization of (Cp*Ru)(3)Co(CO)(2)(mu(3)-CO)B3H3 (Cp* =eta(5)-C5Me5): A metallaborane with cubane cluster structure, ORGANOMETAL, 19(22), 2000, pp. 4429-4431
Addition of a cobalt carbonyl fragment to (Cp*Ru)(3)(mu -N)(2)B3H6 leads to
hydrogen loss and formation of the highly condensed (Cp*Ru)(3)Co(CO)(2)(mu
3-CO)-B3H3 cluster. Viewed as a 60-electron tetranuclear metal cluster with
six M-M bonds, it completes the series: 64-electron (CpCo)(4)B4H4 with fou
r M-M bonds; 68-electron (CpNi)(4)B4R4 with two M-M bonds.