Synthesis, crystal structure, conductivity and magnetic properties of trifluoromethylated dinuclear copper(II) complexes with tetracyanoquinodimethane

Abstract

A new compound of formula [Cu ₂ L ² ][tcnq] ₃ has been obtained where L ² is the Robson-type binucleating macrocyclic dianionic ligand obtained by condensation of 1,3-diaminopropane and 2,6-diformyl-4-trifluoromethylphenol and tcnq is tetracyanoquinodimethane. A comparison of the spectroscopic, conducting and magnetic properties of this compound with those of related copper–tcnq materials affords a reasonable understanding of the electronic properties. Single crystals of a partially fluorinated compound of formula [Cu ₂ L ³ ][tcnq] ₃ have been obtained. A careful examination of the crystallographic data suggests similar properties for both fluorinated compounds.