Reactions of amidinate-stabilized germylene chlorides R1Ge(:)Cl (R1 = PhC(NtBu)2) and R2Ge(:)Cl (R2 = PhC(NCy)2, Cy = cyclohexanyl) with trimethylsilylethynyl lithium salt (LLi, L = −C≡CTMS) afforded alkynylgermyl-substituted germylenes R1(:)Ge-GeL3 (1) and [R2GeL2]2Ge(:) (2), respectively. Both of them may undergo the formation of Ge–Ge single bonds with a concomitant 1,2-shift of ethynyl groups. DFT calculations determined the reaction pathways where two possible intermediates (:)GeL2 and RGe(:)L (R = R1, R2) are proposed, which were consistent with the trapping reactions of (:)GeL2 toward IAr–(:)GeL2 (3, IAr = :CN(Ar)CH}2, Ar = 2,6-iPr2C6H3). The reaction of 1 with N3TMS gave a new aminogermylene R1(:)Ge–N(TMS)-GeL3 (4), indicating a reactive Ge–Ge bond.
脒基稳定的亚
甲基氯化物 R1Ge(:)Cl (R1 = PhC(NtBu)2) 和 R2Ge(:)Cl(R2 = PhC(NCy)2,Cy = 环己基)与三甲基
硅乙炔基
锂盐(LLi,L = -C≡CTMS)反应,分别得到了炔基
锗取代的亚
锗 R1(:)Ge-GeL3 (1) 和 [R2Ge
L2]2Ge(:) (2)。这两种化合物都可能形成 Ge-Ge 单键,同时
乙炔基发生 1,2 移位。DFT 计算确定了两种可能的中间产物 (:)Ge
L2 和 RGe(:)L (R = R1、R2)的反应路径,这与 (:)Ge
L2 向 IAr-(:)Ge
L2 (3,IAr = :CN(Ar)CH}2, Ar = 2,6-iPr2C6H3)的捕获反应一致。1 与 N3TMS 反应生成了新的
氨基
锗 R1(:)Ge-N(TMS)-GeL3 (4),表明存在反应性的 Ge-Ge 键。