The first ditungsten(II,II) complexes with amine ligands of the formula W2C
l4 (NH2R)(4) (R=Pr-n (1), Bu-t (2), Cy (3)) have been prepared by reduction
of a tungsten(IV) compound with potassium graphite in the presence of the
appropriate amine. The X-ray crystal structure determination of 3 revealed
a quadruply-bonded ditungsten molecule-having D-2d geometry and a trans arr
angement of the amine Ligands on each metal atom. (C) 1999 Elsevier Science
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