Homobimetallic vanadium d1–d1 complexes: structure and magnetism
Abstract
From Me3SiCC–CCSiMe3 and Ph2PCC–CCPPh2 diynes and vanadocene VCp2, homobimetallic vanadium d1–d1 complexes are synthesized and characterized by X-ray crystal structures of (Cp2V)2(1-2η:3-4η-RCC–CCR), (R = SiMe3 1 PPh2 2); magnetic moments of both complexes from 300 to 2 K indicate an antiferromagnetic J exchange coupling of –10.5 and –59.8 cm–1 for 1 and 2, respectively.