SEVERE DISTORTION OF PI-ALLYL ORIENTATION IN A MOLYBDENUM COMPLEX CONTAINING A STERICALLY DEMANDING LIGAND - CRYSTAL-STRUCTURE OF -DIMETHYLPYRAZOLYL)BORATO-(PI-CINNAMYL)-DICARBONYL MOLYBDENUM(II)
Vs. Joshi et al., SEVERE DISTORTION OF PI-ALLYL ORIENTATION IN A MOLYBDENUM COMPLEX CONTAINING A STERICALLY DEMANDING LIGAND - CRYSTAL-STRUCTURE OF -DIMETHYLPYRAZOLYL)BORATO-(PI-CINNAMYL)-DICARBONYL MOLYBDENUM(II), Journal of organometallic chemistry, 485(1-2), 1995, pp. 1-5
Steric interaction between a terminal allyl substituent and the proxim
al 3-methyl group of the pyrazole can result in a severe distortion of
the pi-allyl orientation, as diagnosed by the downfield chemical shif
t of the central proton of the allyl group and confirmed by the X-ray
crystal structure of a pi-cinnamyl complex of molybdenum containing hy
drotris-(3,5-dimethylpyrazolyl)borate ligand.