Synthesis and crystal structure of cationic complex of ytterbium with organogermanium cuprate anions {[Yb(THF) 6] 2+[(Ph 3Ge) 2Cu] 2−} · 2THF

Abstract

The cationic complex of ytterbium {[Yb(THF) 6] 2+[(Ph 3Ge) 2Cu] 2 −} · THF ( 1) was synthesized by redox transmetallation reaction of Yb with Ph 3GeCu(PPh 3) 3 in the presence of a catalytic amount of YbI 2(THF) 4 and by the exchange reactions of (Ph 3Ge) 2Yb(THF) 4 with Ph 3GeCu(PPh 3) 3 or PhCCCu. X-ray diffraction study has shown that crystals of 1 have an ionic structure composed of isolated [Yb(THF) 6] 2+ cations (YbO 2.350(5), 2.369(4), 2.383(5)Å) and [(Ph 3Ge) 2Cu] − anions (CuGe 2.335(1), 2.339(1)Å: GeCuGe 175.96(5)°). The Yb and Cu atoms in 1 have distorted octahedral and linear coordinations respectively.