122295-31-2Relevant academic research and scientific papers
Synthesis and structure of chiral rhenium allyl complexes of the formula (η5-C5H5)Re(NO)(PPh3)(CH 2C(R′)=CHR)
Bodner, Gerardo S.,Emerson, Kenneth,Larsen, Raymond D.,Gladysz
, p. 2399 - 2404 (2008/10/08)
Reaction of Li+[(η5-C5H5)Re(NO)(PPh 3)]- with allyl, methallyl, and cinnamyl chlorides gives η1-allyl complexes (η5-C5H5)Re(NO)(PPh3)(CH 2C(R′)=CHR) (2a-c) in 72-93% yields. Complexes 2 are also prepared (70-84%) by reaction of t-BuO-K+ with alkene complexes [(η5-C5H5)Re(NO)(PPh3)(H 2C=CH-(R′)CH2R)]+ PF6- and are characterized by NMR, IR, and mass spectroscopy. The crystal structure of 2c (monoclinic, P21/n, a = 13.509 (3) A?, b = 14.871 (2) A?, c = 14.698 (3) A?, β = 112.54 (1)°, Z = 4) shows two conformations of the cinnamyl ligand which differ primarily in orientation about the Cα-Cβ bond. Difference 1H NOE experiments on 2c and 2a suggest the presence of analogous conformations in solution.
