The First Example of a Seven-Coordinate Vanadium(III) Thiolate Complex Containing the Hydrazine Molecule, an Intermediate of Nitrogen Fixation

The first example of a seven-coordinate vanadium(III) thiolate
complex, [V(PS3‘ ‘)(N2H4)3] (1), where PS3‘ ‘ = [P(C6H3-3-Me3Si-2-S)3]3-, has been synthesized and characterized. Compound 1
contains a tetradentate ligand (PS3‘ ‘) and three hydrazine
molecules, forming a capped octahedral geometry. A five-coordinate
vanadium(III) complex, [V(PS3)(1-Me-Im)] (2), where PS3 =
[P(C6H4-2-S)3]3- and 1-Me-Im = 1-methyl-imidazole, was also
obtained. Compound 2 adopts a trigonal bipyramidal geometry, in
which the vanadium is ligated by the title ligand, PS3, and one
1-Me-Im molecule.