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Synthesis, Characterization and Crystal Structures of Four Dinuclear Schiff Base Nickel(II) and Copper(II) Complexes with Versatile Bridging Groups
Author(s) -
Qiu XiaoYang,
Liu WeiSheng,
Zhu HaiLiang
Publication year - 2007
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200700132
Subject(s) - chemistry , schiff base , thiocyanate , nickel , copper , azide , crystallography , crystal structure , octahedron , diamine , stereochemistry , polymer chemistry , inorganic chemistry , organic chemistry
Four novel Schiff base nickel(II) and copper(II) complexes, derived from the end‐on ( μ 1,1 ‐N 3 ) azide, end‐to‐end ( μ 1,3 ‐NCS) thiocyanate, or phenolate oxygen bridges, have been synthesized and their crystal structures determined by X‐ray diffraction methods. They are the dinuclear double end‐on azide‐bridged [Ni 2 (L1) 2 (MeCN) 2 ( μ 1,1 ‐N 3 ) 2 ]·MeOH ( 1 ), the dinuclear double end‐on azide‐bridged [Ni 2 (L2) 2 (MeOH) 2 ( μ 1,1 ‐N 3 ) 2 ][Ni 2 (L2) 2 (OH 2 ) 2 ( μ 1,1 ‐N 3 ) 2 ]·MeOH ( 2 ), the dinuclear double end‐to‐end thiocyanate‐bridged [Cu 2 (L3) 2 ( μ 1,3 ‐NCS) 2 ] ( 3 ), and the dinuclear double phenolate O‐bridged [Cu 2 (L4) 2 (NCS) 2 ] ( 4 ), where HL1, HL2, HL3 and HL4 are four tridentate Schiff bases obtained by the condensation of 3,5‐dibromosalicylaldehyde with N ‐ethylethane‐1,2‐diamine, of 3,5‐dichlorosalicylaldehyde with N ‐methylpropane‐1,3‐diamine, of 3‐bromo‐5‐chlorosalicylaldehyde with 2‐aminomethylpyridine, and of 5‐nitrosalicylaldehyde with 2‐aminomethylpyridine, respectively. Each nickel(II) atom in 1 and 2 is in an octahedral coordination, while each copper(II) atom in 3 and 4 is in a square pyramidal coordination. There exists crystallographic inversion centre symmetry in each of the complexes.