MoIV chloromethylidyne complexes: structure of dicarbonyl(chloromethylidyne)[hydrotris(3,4,5-trimethyl-1-pyrazolyl)borato]molybdenum(IV)

Mo(CC1){B(C6H9N2)3H}(CO)2), Mr = 538.7, orthorhombic, Pbn2l, a=9"179(2), b = 15.899 (3), c = 17.778 (2) A, V = 2595 (1) ,~3, Z = 4, Dx = 1.38 g cm -3, A(Mo Ka) = 0.71073 A, /x = 6.2 cm- 1, F(000) = 1104, T = 291 K, R = 0.028 for 2101 reflections with I> 3tr(/). The Mo atom has octahedral coordination, with principal dimensions Mo--C(chloromethylidyne) 1.798 (5), C--C1 1.680 (6), Mo--C(carbonyl) 1-982 (6), 1.974 (6), Mo--N(trans to chloromethylidyne ligand) 2.268 (4),