title: The seven-membered nickelacycle [NiBr=(o-CH=C(CF3)C6H4CH2PPh2-kappa2C,P)(PPh(CH2Ph)2)].
abstract: The crystal and molecular structures of the title compound, 3-bromo-3-(dibenzylphenylphosphonio)-2,2-diphenyl-5-trifluoromethyl-1H-benzo[e][1,2]phosphanickelepine, [NiBr(C(22)H(17)F(3)P)(C(20)H(19)P)], which was obtained as the major regioisomer from insertion of HCCCF(3) into the Ni-C bond of the five-membered phosphanickelacycle [NiBr(o-C(6)H(4)CH(2)PPh(2)-kappa2C,P)(PPh(CH(2)Ph)(2))], have been determined. Principal geometric data include the Ni-X bond lengths Ni-Br 2.3343 (4) A, Ni-P 2.1867 (7) and 2.2094 (7) A, and Ni-C 1.882 (3) A, and the two trans angles P-Ni-P 171.55 (3) degrees and Br-Ni-C 176.88 (9) degrees.
authors.affiliation: Research School of Chemistry, Australian National University, ACT 0200, Australia. alison.edwards@anu.edu.au
authors.forename: Alison J
authors.initials: AJ
authors.lastname: Edwards
authors.forename: Eric
authors.initials: E
authors.lastname: Wenger