New general synthetic strategy of fulvalene homodinuclear zwitterions. Electrochemical behavior of (η:5η5-(C5H3CO 2Me)2)Mo2(CO)6R2 (R = I, Me)

The reaction of Li2[η⁵:η⁵-(C5H 3CO2Me)2)Mo2(CO)6] (from trans-(η⁵:η⁵-(C5H3CO 2Me)2)Mo2-(CO)6) (1) with MeI yields (η⁵:η⁵-(C5H3CO 2Me)2)Mo2(CO)6Me2 (3). The reaction of cis-(η⁵:η⁵-(C5H3CO 2Me)2)Mo2(CO)6 (2) with I2 leads to the formation of (η⁵:η⁵-(C5H3CO 2Me)2)Mo2(CO)6I2 (4). The X-ray structure of 4 has been determined. The reactions of 1 with P-donor nucleophiles (PPhMe2, PPh2Me, P(n-Bu)3, and PMe3) and (η⁵:η⁵-(C10H8)M 2(CO)6 (M = Mo and W) …