T. Ren, Steven Radak, Yuhua Ni
Jul 1, 2002
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0
Influential Citations
17
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Journal
Journal of Chemical Crystallography
Abstract
AbstractCrystal structures of four diphenylformamidines bearing phenyl substituents ortho-CH3O (1), ortho-C2H5O (2), meta-CH3O (3), and meta-nBuO (4) are reported. In each of the structures, formamidine exists as an unsymmetrical cyclic hydrogen bond dimer, and the geometry of the amidine unit is consistent with the localized C–N and C=N bonds. Interesting conformations due to the orientation of aryl groups were also observed. Crystal Data: 1, orthorhombic, Pbca, a = 11.297(1) Å, b = 15.092(1) Å, c = 16.380(2) Å, V = 2792.6(4) Å3, Z = 8; 2, triclinic, P $$\overline 1$$ , a = 9.651(1) Å, b = 11.974(1) Å, c = 14.583(2) Å, α = 101.789(2)°, β = 99.320(2)°, γ = 99.048(2)°, V = 1595.9(3) Å3, Z = 4; 3, orthorhombic, Pbca, a = 15.562(2) Å, b = 8.626(1) Å, c = 20.110(2) Å, V = 2699.4(5) Å3, Z = 8; 4, monoclinic, P21/c, a = 14.525(2) Å, b = 15.534(2) Å, c = 8.818(1) Å, β = 93.113(2)°, V = 1986.6(4) Å3, Z = 4.