ditriflato-diborane B2(hpp)2(OTf)2 (hpp = 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-α]pyrimidinate), novel symmetric and unsymmetric diboranes B2(hpp)2X2 and B2(hpp)2XY with X,Y = Br, NCS, N3 or OTf are synthesized by substitution reactions with SN1 mechanisms. The stability of the unsymmetric diboranes with respect to dismutation equilibria is evaluated.
从富电子二
三氟甲磺酸乙
硼烷 B 2 (hpp) 2 (OTf) 2 (hpp = 1,3,4,6,7,8-hexahydro-2 H -pyrimido [1,2- α ]pyrimidinate)开始,新颖对称和非对称乙
硼烷 B 2 (hpp) 2 X 2和 B 2 (hpp) 2 XY X,Y = Br,
NCS, N 3或 OTf 通过 S N 1 机制的取代反应合成。评估了不对称乙
硼烷相对于歧化平衡的稳定性。