Electron spin resonance studies on bis(chloroalkoxy)bis(η-cyclopentadienyl)vanadium(IV) complexes

Abstract

The e.s.r. spectra of [V(OCH₂CH₂Cl)₂(η-C₅H₅)₂] and [V(OCHMeCH₂Cl)₂(η-C₅H₅)₂] were determined at room temperature and as frozen solutions at 120 K. From g_x= 1.985, g_y= 1.975, and g_z= 2.002 and (⁵¹V)A_x=–77, A_y=–125, A_z=–17 G, the molecular coefficients of the a₁ ground state and the usual e.s.r, parameters χ, P, K, 〈r^–3〉, and ξ were calculated and compared with the literature data for related [VX₂(η-C₅H₅)₂](X = Cl, Et, or OCN) derivatives. The importance of the role of the solvent on spectral features has been demonstrated.