Preparation, X-ray crystal and electronic structure of the novel raft cluster [NbAuH2{C5H4(SiMe3)}2]3

The reaction of (C5H4SiMe3)2NbH3 with Au[N(SiMe3)2]PPh3 produces the novel raft cluster [NbAuH2{C5H4(SiMe3)}2]3 in high yield; the structure consists of a gold triangle surrounded by 3 Cp′2Nb groups (Cp′= C5H4SiMe3) and 6 bridging hydrides [Au–Au 2.7635(20), 2.7571(18), and 2.7801(25)A; Nb–Au 3.0321(25), 3.0326(25), and 2.9891(18)A], MO calculations indicate a striking electronic stabilization of this geometry which may be of importance in other gold hydrides.

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