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A Self‐Assembling Triple‐Helical Co 2 II Complex : Synthesis and Structure
Author(s) -
Williams Alan F.,
Piguet Claude,
Bernardinelli Gérald
Publication year - 1991
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199114901
Subject(s) - octahedron , cobalt , perchlorate , denticity , crystallography , chemistry , coordination sphere , coordination geometry , octahedral molecular geometry , stereochemistry , crystal structure , molecule , inorganic chemistry , ion , hydrogen bond , organic chemistry
Not a simple tetradentate, but rather a bis(bidentate) coordination is revealed for L (L = bis[1‐methyl‐2(6‐methyl‐2‐pyridyl)benzoimidizol‐5‐yl]methane) and is attributed to the inflexibility of its aromatic rings. In its reaction with cobalt(II) perchlorate an orange salt is produced, in which the three ligands wind about the Co–Co axis in a helical fashion. Both Co atoms have an octahedral coordination geometry, in which the octahedron is flattened along the C 3 axis. The Co 2 complex is represented schematically on the right (black, Co; white, coordinated N atoms of L).