SYNTHESIS, NMR, AND STRUCTURAL CHARACTERIZATION OF THE [NI9PT3(CO)21H4-4]N-, [NI9PT3(CO)21H4-3]N-, [NI9PT3(CO)21H4-2]N- ANIONIC CLUSTERS

The preparations of bimetallic carbonyl clusters having the general formula [Ni9Pt3(CO)21H-n]n- (n = 4, 3, 2) are described. X-ray studies on [NEt4]3[Ni9Pt3(CO)21H] show that it is isostructural with [Ni12(CO)21H]3-, with the platinum atoms occupying the inner triangle of the central Ni3Pt3 planar triangulated array. The interstitial coordination of the hydride atoms in these compounds is inferred from 1H and 195Pt NMR and X-ray data.