STRUCTURE OF THE 2-PYRIDYLHYDRAZONE OF FERROCENECARBALDEHYDE

Ferrocenecarbaldehyde 2-pyridylhydrazone, [Fe(eta5-C5H5)(eta5-C11H10N3 )], M(r) = 305.17, monoclinic, P2(1)/a, a = 9.972 (1), b = 8.308 (1), c = 17.010 (2) angstrom, beta = 97.371 (4)degrees, V = 1397.7 angstrom 3, Z = 4, D(x) = 1.45 g cm-3, lambda(Mo Kalpha) = 0.71069 angstrom, mu = 10.7 cm-1, F(000) = 632, T = 293 K, R = 0.036 and wR = 0.049 for 22 83 observed reflections. The molecule exhibits an E configuration, has an N=C bond length of 1.274 (4) angstrom and an N-N bond length of 1. 368 (4) angstrom. The cyclopentadienyl rings are eclipsed with Fe-C di stances of 2.037 (4) to 2.051 (3) angstrom, mean 2.042 (4) angstrom. T he cyclopentadienyl rings are essentially parallel. The pyridyl group is not coplanar with the cyclopentadienyl ring, but inclined at an ang le of 27.5 (2)degrees to it.