The title compound crystallizes in the monoclinic spacegroup P2(1)/m with a
= 6.796(9), b = 12.145(14), c = 7.749(8)Angstrom, beta = 101.86(1)degrees,
and Z = 2. The crystal structure consists of molecules of [MoCl(CO)(2)(NCM
e)(2)(eta(3)-C3H4Me-2)] with crystallographically imposed C-8 symmetry and
has a pseudo-octahedral geometry, with the pi-allyl group trans- to the chl
oro group and the two cis-carbonyl and acetonitrile groups occupying the eq
uatorial plane.