Synthesis and structural diversity of 2-pyridylmethylideneamine complexes of zinc(II) chloride
摘要:
The addition reactions of zinc(II) chloride to N-substituted pyridine-2-carbaldimines [Py-CH=NR, R = Me (1a), Ph (1b), Bz (1c), allyl (1d)] lead to different complexes dependent on the N-bound substituent R. The 1:1 complexes show molecular structures of the type [(Py-CH=NR) ZnCl2] for R = methyl (2a), phenyl (2b), and allyl (2d) with a distorted tetrahedral environment for the zinc atom. The zinc complex with the N-methylated pyridine-2-carbaldimine also forms a dimer of the type [(Py-CH=NR)ZnCl2](2) (2a)(2) with a square pyramidal coordination sphere of zinc. A 3: 2 stoichiometry is observed for R = benzyl and an ion pair of the type [Zn(Py-CH=NR)(3)](2+) [ZnCl4](2) (2c) is found in the solid state. (C) 2009 Elsevier B. V. All rights reserved.