Mountford, Andrew J., Lancaster, Simon J., Coles, Simon J., Horton, Peter N., Hughes, David L., Hursthouse, Michael B. and Light, Mark E. (2006) The synthesis, molecular structures, and supramolecular architecture of amine adducts of bis(pentafluorophenyl)zinc. Organometallics, 25 (16), 3837-3847. (doi:10.1021/om060319d).
Abstract
A series of eight adducts of the form (RR'R"N)(2)center dot Zn(C6F5)(2) have been prepared through treatment of the Lewis acid Zn(C6F5)(2) with 2 equiv of the corresponding amine (R = Bu-t or CH2Ph, R' = R" = H; R = R' = Me or CH2Ph, R" = H; R = Me, R' = CH2Ph, R" = H; RR' = cyclo-C4H8 or cyclo-C5H10, R" = H; R = R' = Me, R" = CH2Ph). The solid-state structures of all eight compounds have been elucidated by single-crystal X-ray diffraction. In each case the geometry about the zinc atom is essentially tetrahedral. However, there is considerable variation in the supramolecular architectures in the solid state. A number of types of noncovalent interactions are observed including phenyl-pentafluorophenyl stacking, X-H center dot center dot center dot F-C contacts, and offset face-to-face contacts between pentafluorophenyl rings, giving rise to one-, two-, and three- dimensional supramolecular structures. In our examples we find that no one intermolecular interaction predominates.
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