[(Me3B3N3H2)Li(pmdta)] (2c) is monomeric. The N-lithiation leads to a distortion of the planar B 3 N 3 ring system: the B-N bonds at the metallated N atoms are short, the next opposite B-N pair is the longest, followed by a shorter B-N bond involving the B atom in the para position. However, all B-N bonds are longer than in the parent compound 1. Reaction of tBu 3 B 3 N 3 H 3 (3) with tBuLi in the presence
三甲基环
硼氮烷 (Me 3 B 3 N 3 H 3 , 1) 在己烷溶液中通过烷基交换与 RLi (R = nBu, tBu) 反应,得到
硼嗪 Me 3 - n R n B 3 N 3 H 2 的混合物。相比之下,1 到 Me 3 B 3 N 3 H 2 Li (2) 的去质子化发生在用二
乙醚溶液中的 MeLi 或与
四甲基乙二胺 (TME
DA)、五甲基
二乙三胺 (
PMDTA) 复合的 RLi (R = nBu, tBu) 或三甲基六氢三嗪 (
TMTA) 的己烷溶液,得到 2. [(Me 3 B 3 N 3 H 2 )Li(OEt 2 )] (2a), [(Me 3 B 3 N 3 H 2 )Li(
TMThref=https://www.molaid.com/MS_21891929 target="_blank">TMta) 的溶剂化物] (2c) 和 [(Me 3 B 3 N 3 H 2 Li) 4 (TMe
DA) 3 ] (2b) 包含 2 的二聚单元。在 2b 的情况下,这些二聚体中的两个由一个 TMe
DA