Layered structures constructed by second-sphere coordination via N–H ··· Cl and C–H ··· Cl hydrogen bonding: synthesis and crystal structures of tribenzylamine and [MCl6] (M = Sn, Re, and Te)

Abstract

A series of second-sphere coordination complexes of tribenzylamine (L 1 ) and [MCl6] (M = Sn, Re, Te) have been synthesized and characterized by spectroscopic techniques (IR, NMR) and single-crystal X-ray diffraction. The main driving force for the encapsulation of [MCl6] and recognition with L 1 is the second-sphere coordination of metal halides by the amide protons of the ligand via hydrogen bonding (N–H ··· Cl–M and C–H ··· Cl–M); new layered structures are described. Thermal stability and irreversible behavior of second-sphere coordination complexes [L 2 ] · 0.5[TeCl6]2− · HCl · (H3O)+ · 0.5H2O (L 2 = N,N,N′,N′-tetrabenzyl-ethylenediamine) in contact with water vapor are also described.