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Journal of Structural Chemistry

2013 year, number 1

CRYSTAL STRUCTURES OF ALLYLTRIPHENYL-PHOSPHONIUM HALOGENOCUPRATES(I)

G. V. Noshchenko, N. F. Salivon, B. Zarychta, V. V. Olijnyk
Keywords: crystal structure, copper(I), allyl phosphonium, stacking, weak hydrogen bonds, phenyl embrace, homoconjugation, hyperconjugation

Abstract

Alternating-current electrochemical synthesis is used to obtain for the first time halogenocuprates of an allyl derivative of phosphonium of the composition (CH2=CHCH2(C6H5)3P)CuX2 (X = Br (I), Cl (II)). Compound I crystallizes in the space group P21, a = 9.6341(3) Å, b = 12.4167(4) Å, c = 9.9618(4) Å, β = 117.484(5)°, Z = 2. Compound II crystallizes in the space group Р21/n , a = 9.9725(5) Å, b = 15.4586(8) Å, c = 13.7557(5) Å, β = 90.429(4)°, Z = 4. In the structures of I and II quasilinear CuX2 anions are held by С–H⋯Х hydrogen bonds inside a framework formed by the stacking of phenyl groups from СH2=СHCH26Р5)3P+ cations. Allyl groups are not involved in coordination with copper (I) atoms.