The synthesis of triangulo-trimetal complexes containing both iron(II) and vanadium(II)

Reactions between a variety of vanadium(II) and iron(II) starting materials in tetrahydrofuran (thf) solution afforded di-, tri-, and tetra-nuclear complexes containing thf or N,N,N ' ,N ' -tetramethylethylenediamine (tmen) as ligands. Most products were ionic and contained the two metals in different structural units, cation or anion. Trinuclear clusters formulated as [V3-x-FexCl5(tmen)(3)][BPh4](x = 0-3) were obtained and characterised by C, I-I, N and metal analyses, H-1 NMR, Mossbauer, and positive ion FAB and electrospray mass spectroscopies, and magnetic moment measurements in solution. We characterised fully by low-temperature single-crystal X-ray diffraction analysis the mixed-metal triangulo-complex salt [V2Fe(mu -Cl)(3)(mu (3)-Cl)(2)(tmen())3][BPh4]. (C) 2001 Elsevier Science B.V. All rights reserved.