Journal of the Chemical Society, Dalton Transactions p. 1521 - 1528 (1990)
Update date:2022-08-04
Topics:
Burford, Neil
Royan, Bruce W.
Spence, Rupert E. v. H.
Cameron, T. Stanley
Linden, Anthony
Rogers, Robin D.
A number of adducts composed of phosphine oxides and Group 13 Lewis acids R3PO*EX3 (R = Ph, NMe2, or PhO; E = B, Al, or Ga; X = F, Cl, or Br) have been spectroscopically characterised by multinuclear n.m.r. spectroscopy.Three isostructural derivatives have been structurally characterised by X-ray crystallography.Crystal data (all hexagonal, space group <*>3, Z = 6): Ph3PO*AlCl3, a = 13.663(2), c = 18.258(2) Angstroem, R = 0.062; Ph3PO*AlBr3, a = 14.021(6), c = 18.387(3) Angstroem, R = 0.041; Ph3PO*GaCl3, a = 13.753(6), c = 18.345(6) Angstroem, R = 0.079.The structures show a uniquely linear or almost linear P-O-E backbone, which lies on the three-fold axis, in contrast to the bent structures observed for the corresponding BF3 adducts and other related systems.Short Al-O bonds
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