Abstract
The monosubstituted complex [MoO2Cl2{κ2-O,O′-{4,5-(P(O)Ph2)2tzH}}] (tz=1,2,3-triazole) (4) and [Mo(NtBu)2{κ2-N,S-{4,5-(P(S)Ph2)2tz}}2] (12), and the disubstituted complexes, [MoO(NtBu){κ2-O,N-{4,5-(P(O)Ph2)2tz}}2] (8) and [Mo(NtBu)2{κ2-N,E-{4,5-(P(E)Ph2)2tz}}2] [E=O(9), S(10), Se(11)] were prepared using the corresponding ligands [{(4,5-(P(E)Ph2)2tz}H] [E=O(1), S(2), Se(3)] and molybdenum precursors, MoXYCl2(dme) (X=Y=O; X=O, Y=NtBu; X=Y=NtBu, dme=dimethoxyethane). The disubstituted complexes 4, 8, 9 and 11 were obtained regardless of the ligand/metal ratio used in the reaction (1:1 or 2:1). Complexes 8 and 9 exhibit one type of geometric isomer in solution while 10 and 11 show two types of isomers in solution. In these compounds at least one isomer with C2 symmetry is observed. Complexes 4, 8, 9 and 10 were characterized by X-ray diffraction analysis.
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