Monocyclooctatetraenyluranium(IV) borohydrides. Crystal structure of (η-C8H8)U(BH4)2(OPPh3)

Article abstract of DOI:10.1016/0022-328X(90)85375-9

U(BH4)4 has been shown to react with (COT)2U (COT = η-C8H8) or cyclooctatetraene to give the monocyclooctatetraenyl complex (COT)U(BH4)2 (III), which has been converted into the Lewis base adducts (COT)U(BH4)2L (L = PPh3, V; THF, VI: OPPh3, VII) and the mixed ring derivatives (COT(Cp)U(BH4)L (Cp = η-C5H5; L = THF; OPPh3.VIII).The crystal structure of VII shows it to have a three-legged piano stool configuration.