Monomeric 2-pyridylbis(trimethylsilyl)methyltin(II) compounds Sn(R)X [= (SiMe3)2C5H4N-2 and = (1), l (2), or (SiMe3)2(3)] were prepared from (LiR)2 and (a) SnCl2 or Sn(OC6H3But2-2,6)2(1), (b) 2SnCl2(2), or (c) Sn[N(SiMe3)2]2(3); their X-ray structures show that the ligands are invariably bonded to tin in a chelating fashion in the crystal with SnâC and SnâNC5H4 bond lengths of 2.35(2) and 2.42(2)(1), 2.32(2) and 2.27(3)(2), and 2.356(8) and 2.299(5)Ã
(3), respectively, but in C6D5CD3 solution there appear to be (n.m.r.) C5H4NâSn dissociative processes (ÎGâ¡ca. 43 ± 2 kJ molâ1).
单体 2-
吡啶基双(三甲基
硅基)
甲基锡(II)化合物 Sn(R)X [= (SiMe3)2 -2 and = (1), l (2)、或 (SiMe3)2(3)] 由 (LiR)2 和 (a) SnCl2 或 Sn(OC6H3But2-2,6)2(1)、(b) 2SnCl2(2) 或 (c) Sn[N(SiMe3)2]2(3) 制备而成;它们的 X 射线结构显示,
配体在晶体中始终以螯合方式与
锡结合,SnâC 和 SnâNC5H4 的键长分别为 2.但在 C6D5CD3 溶液中,似乎存在(n.m.r. )
C5H4NâSn 解离过程(δGâ¡ca. 43 ± 2 kJ molâ1)。