= 600 Hz). IR: 1512 (s), 1440 (s), 1355 (w), 1301 (w), 1282 (s), 1209 (m), 1169 (w), 1154 (w), 1096 (w), 1076 (w), 1006 (w), 969 (w), 921 (w), 874 (s), 852 (w), 829 (m), 784 (w), 647 (w), 496 (w), 438 (w) cm"1.Preparation of [Mo(Ntol)(S2CNEt2)2]20. A portion of PPh3 (0.128 g; 0.49 mmol) was added to a stirred solution of MoO(Ntol)(S2CNEt2)2 (0.500 g; 0.97 mmol) in CH2C12 (25 mL) at room temperature. After 12 h, the violet solution was taken to dryness, and the purple residue was triturated with Et20 (3 X 25 mL), collected by filtration, and dried in vacuo. Analysis of the Et20 washings by IR and 31P NMR spectroscopy revealed the presence of Ph3PO. Elemental analysis of the purple product indicates that the dimeric complex is obtained as the CH2C12 solvate.
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