Synthesis and structure of [L][MoIVO(mnt)2] {L = [(C2H5)4N]+, [C5H5NH]+, [(C2H5)3NH]+, [lysinium]2+ and (mnt2-=1,2-dicyanoethylenedithiolate) in relevance to molybdenum cofactor of diverse class of molybdoenzymes

The title compounds [Et4N](2)[(MoO)-O-IV(mnt)(2)] (1), [PyH](2) [(MoO)-O-IV(mnt)(2)] (2) and (C2H5)(3)NH](2)[(MOO)-O-IV(mnt)(2)] (3) and [lysinium][(MOO)-O-IV(mnt)(2)] (4) have been synthesized and crystal structures of 1 and 2 have been determined. 1 crystallizes in space group P21212 with a = 29.948(6) Angstrom, b = 14.779(4) Angstrom, c = 7.373(2) Angstrom, V = 3263.30(1) Angstrom(3) and Z = 4 and the compound 2 crystallizes in space group P2/n with a = 7.460(7) Angstrom, b = 11.449(1) Angstrom, c = 26.657(3) Angstrom, beta = 93.89(3)degrees, V = 2271.52 Angstrom(3), Z = 4. The Mo=O bond (1.71 Angstrom) in 2 is longer than that of (1.67 Angstrom) in 1 is due to hydrogen bond in 2, which controls the reactivity of molybdenum towards trimethylamine N-oxide. (C) 2003 Elsevier B.V. All rights reserved.