title: Linear copper 'chain' complexes with bulky tritopic hydrazone ligands--structural and magnetic studies.
abstract: Tritopic 2,6-picolyl-bis-hydrazone ligands with bulky terminal groups derived from phenyl-pyridyl ketone do not form the expected [3 x 3] grids on reaction with copper(II), but instead form Cu8 'pinwheels', and in the present case linear trinuclear, pentanuclear and chain structures also. Direct bridging between copper ions occurs through micro2-N-N diazine groups, and longer O-C-N hydrazone connections, leading to moderately strong antiferromagnetic exchange between adjacent metal centres. Structural and magnetic properties are discussed in the context of specific orthogonal and non-orthogonal bridges, which can be distinguished and quantified.
authors: Department of Chemistry, Kent State University, Salem Campus, Salem, OH 44460, USA. standon@kent.edu
authors: Santokh S
authors: SS
authors: Tandon
authors: Louise N
authors: LN
authors: Dawe
authors: Victoria A
authors: VA
authors: Milway
authors: Julie L
authors: JL
authors: Collins
authors: Laurence K
authors: LK
authors: Thompson