Weak Magnetic Coupling of CoordinatedVerdazyl Radicals through Diamagnetic MetalIons. Synthesis, Structure, and Magnetism of aHomoleptic Copper(I) Complex
The synthesis and characterization of a copper(I) complex containing two-coordinated chelating verdazyl radicals are described. The structure (shown) consists of a distorted tetrahedral geometry at the copper ion; the angle between the planes defined by the two verdazyl rings is nearly 116°. Variable-temperature magnetic-susceptibility data for the complexes were obtained, the analysis of which revealed very weak intramolecular magnetic coupling between the two-coordinated radicals.