Open AccessEnantiomeric bis(μ‐ N , N ′‐hexamethylenedisalicylaldiminato)dicopper(II) complexes
Author(s) -
Friščić Tomislav,
Lough Alan J.,
Ferguson George,
Kaitner Branko
Publication year - 2002
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
eISSN - 1600-5759
pISSN - 0108-2701
DOI - 10.1107/s0108270102006297
Subject(s) - crystallography , thermogravimetric analysis , differential scanning calorimetry , crystallization , chemistry , enantiomer , crystal structure , infrared spectroscopy , hexane , space group , diffraction , stereochemistry , x ray crystallography , physics , organic chemistry , optics , thermodynamics
The title dimeric complex, bis{μ‐2,2′‐[hexane‐1,6‐diylbis(nitrilomethylidyne)]diphenolato‐1:2κ 4 O , N : N ′, O ′}dicopper(II),[Cu 2 (C 20 H 22 N 2 O 2 ) 2 ], has been investigated by single‐crystal X‐ray diffraction, by thermogravimetric analysis and differential scanning calorimetry, and also by FT–IR spectroscopy. Different synthetic and crystallization procedures gave crystals which were quite different in appearance, and it was initially thought that these were different polymorphic forms. Subsequent structure determination showed, in fact, serendipitous preparation of crystals in the P 4 1 space group by one method and in space group P 4 3 by the other. In these enantiomorphic structures, the Cu atoms have a distorted flattened tetrahedral coordination, with Cu—N and Cu—O distances in the ranges 1.954 (4)–1.983 (4) and 1.887 (4)–1.903 (4) Å, respectively.