Triphenylphosphine-catalyzed .eta.1-.eta.3-allyl complex tranformation via carbonyl insertion into an .eta.1-allyl complex including the structural analysis of (.eta.5-C5H5)Mo(CO)2(PPh3)COCH2CH:CHMe

trans-Acetyldicarbonyl(η5-cyclopentadienyl)[tris(furan-2-yl)phosphane-κP]molybdenum(II)

“…These contacts between the acetyl carbonyl and hydrogen atoms may contribute to the unusual geometry adopted by the acetyl ligand, where the carbonyl points down, away from the Cp ring. In related structures reported by this laboratory (Whited et al, 2012) and others (Churchill & Fennessey, 1968;Michelini-Rodriguez et al, 1993;Adams et al, 1997Adams et al, , 2000, the carbonyl points up toward the Cp ring. These hydrogen-bonding interactions lead to the formation of layers parallel to (100), as shown in Fig.…”

“…For synthetic details for a related complex, see: Gladysz et al (1979). For related structures, see: Churchill & Fennessey (1968); Barnett et al (1972); Michelini-Rodriguez et al (1993); Adams et al (1997Adams et al ( , 2000; Whited et al (2012).…”

Cyclopentadienyl Complexes of Chromium, Molybdenum and Tungsten

“…521 I t is well known that treatment of [M(CO) 3 Cp]~ (M = Mo, W) with allyl halides produces initially a-allyl tricarbonyl complexes, which can then be decarbonylated to the corresponding T| 3 -allyls by photolysis; an alternative procedure uses Me^NO to effect this conversion. 525 527 In an interesting related reaction of the carbonyl anion with epibromohydrin, BrCH 2 CHCH 2 O, in the presence of PPh 3 , the 2-furyl complex [Mo(C=CHCH=CHO)(CO) 2 (PPh 3 )Cp] was formed, whereas in the absence of PPh 3 the product was [Mo(CO) 2 (a,ii 2 -COOCH 2 CH=CH 2 )Cp]. 528 In the same way as for the allyl complexes, a-pentadienyl and hexadienyl species [Mo(CH 2 CH=CHCH=CHR)(CO) 3 Cp] (R = H, Me) have been made and converted to i} 3 and t| 5 -complexes.…”