Homobimetallic vanadium d¹–d¹ complexes: structure and magnetism

Abstract

From Me₃SiC[triple bond, length half m-dash]C–C[triple bond, length half m-dash]CSiMe₃ and Ph₂PC[triple bond, length half m-dash]C–C[triple bond, length half m-dash]CPPh₂ 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-RC[double bond, length half m-dash]C–C[double bond, length half m-dash]CR), (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.

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