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Pyridine vs. Bipyridine Coordination in PtCl 2 Complexes of 4‐ t Butyl‐4'‐(4‐pyridinyl)‐2, 2'‐bipyridine
Author(s) -
Rank Matthias,
Zabel Manfred,
Winter Rainer F.
Publication year - 2013
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.201300139
Subject(s) - denticity , chemistry , pyridine , bipyridine , ligand (biochemistry) , 2,2' bipyridine , stereochemistry , hydrogen bond , medicinal chemistry , imine , terpyridine , crystallography , ring (chemistry) , molecule , crystal structure , metal , organic chemistry , biochemistry , receptor , catalysis
The reaction of the new terpyridine ligand 4‐ t butyl‐4'‐(4‐pyridinyl)‐2, 2'‐bipyridine L with various sources of “PtCl 2 ” selectively yields either trans‐ [PtCl 2 ( L ) 2 ] ( 1 ) with L bonded in a monodentate fashion via its pendant 4‐pyridyl ring or cis ‐[PtCl 2 ( L )] ( 2 ), where L coordinates in a bidentate fashion through its 2, 2'‐bipyridine subunit. The molecular structures of L and of complex 1 were determined by X‐ray crystallography and exhibit intra‐ and intermolecular hydrogen bonding. We have also converted the dichloro complex 2 into the bis(coumarin thiolate) complex 3 . Owing to their free imine coordination sites, complexes 1–3 constitute interesting building blocks for multimetal structures in a “complexes as ligands” approach. The reductive behaviour of L and of complexes 1–3 has been investigated by cyclic and square wave voltammetry.