moieties. The generation of 5 represents the first example of the insertion of a heterocumulene into a Ge–C bond, which may be favored by the activation of the isocyanate group by the Lewis acidic Al atom and the increased polarity of the N=C=O fragment as determined by NBO calculations. The reactions of the digermanes 4 with heterocumulenes were unselective and afforded inseparable mixtures. Treatment
所述dialkynylgermane的Ph
铝氢化2葛(C≡C吨丁基)2(1)和digermanes博士Ñ(吨BuC≡C)3- Ñ戈葛(C≡C吨丁基)-3- ñ博士Ñ(2A:n = 2; 2b:n = 1),当量为2当量的H–Al t Bu 2或H–AlEt 2时,得到混合的Al / Ge化合物Ph 2 Ge [C(Al t Bu 2)= CH‐ t Bu] 2(3),[Ph 2 GeC(Al t Bu 2)= CH- t Bu] 2(4a)和[Ph 2 GeC(AlEt 2)= CH- t Bu] 2(4b)。2b与两种
氢化铝的反应提供了不可分离的产物混合物。3通过逆
氢化铝与异聚
枯烯反应。异
氰酸苯基
酯使C = N基团插入到生成的Ge–C(≡C– t Bu)键中(5),而异
硫氰酸苯基
酯的
NCS和NCN基团和
碳二
亚胺插入Al–C
乙烯基键中(6和7)与未受影响的终端的Ge-C≡C-吨卜部分。生成