Abstract
The reaction between CpMo(CO) 3 (η 1 -CH 2 COR) (R = H) (1), CH 3 (2)) and isopropylamine in the presence of BF 3 ·Et 2 O produced the η 1 -imine complexes CpMo(CO) 3 (η 1 -CH 2 CR=NCHMe 2 ) (R = H (3), CH 3 (4)). Decarbonylation of 3 and 4 by Me 3 NO yielded the η 3 -azaallyl complexes CpMo(CO) 2 (η 3 -CH 2 CRNCHMe 2 ) (R = H (5), CH 3 (6)). Complex 6 has been further protonated to give the corresponding iminium salt 7. Treatment of 1 with anhydrous NH 2 NH 2 in the presence of BF 3 ·Et 2 O gave an azine complex [CpMo-(CO) 3 ] 2 (μ-η 1 ,η 1 -CH 2 CHNNCHCH 2 -) (8). Decarbonylation of the latter by Me 3 NO yielded a binuclear diazaallyl complex [CpMo(CO) 2 ] 2 (μ-η 3 ,η 3 -CH 2 CHNNCHCH 2 ) (9). In contrast, the reaction of 2 with anhydrous NH 2 NH 2 led to the formation of an acyl complex CpMo(CO) 2 (-CONHN=CMe 2 ) (10). Treatment of 1 with methylhydrazine likewise produced an analogous cyclic acyl complex CpMo(CO) 2 -(-CONMeN=CRCH 3 ) (R = H (11)). Addition of CH 3 CF 3 SO 3 to 11 gives the stable carbene [CpMo-(CO) 2 (=C(OCH 3 )NMeN=CHCH 3 ]CF 3 SO 3 (12). The molecular structures of 6, 7, 10, and 12 have been determined by X-ray diffraction. © 1991 American Chemical Society.