Ac. Hillier et al., Reduction of rhenium decacarbonyl by samarium(II): synthesis and structureof the spiked triangular anion [HRe4(CO)(17)](-), J ORGMET CH, 588(2), 1999, pp. 200-204
The reaction of [Sm(Tp(2)(Me,Me))] With [Re-2(CO)(10)] gives [Sm(Tp(2)(Me,M
e))]Re(CO)(5), which on further heating gives moderate yields of [Sm(Tp(Me,
Me))(2)](2)[Re-4(CO)(17)]. Crystallization from toluene yields [Sm(Tp(Me,Me
))(2)][HRe4(CO)(17)], which has been crystallographically characterized. It
consists of a 64-electron cluster that adopts a spiked triangular structur
e with the hydride bridging two metal atoms in the equatorial plane of the
cluster. A mechanism for the formation of these tetranuclear clusters is pr
oposed. (C) 1999 Elsevier Science S.A. All rights reserved.