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Campbell JA, Raston CL, Varghese JN, White AH. Crystal structures of trans-Dichloro- and Dibromo-bis(2,6-dimethylpyridine)copper(II). Aust J Chem 1977. [DOI: 10.1071/ch9771947] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The crystal structures of
the title compounds have been determined at 295(1) K by X-ray diffraction and
refined by full-matrix least squares to residuals of 0.045 and 0.067 for 1224
and 1955 ?observed? reflections respectively. The compounds are isomorphous
(triclinic, Pī, Z 1). Dichloro compound: a 8.068(2),
b 8.024(2), c 7.646(2) Ǻ, α 93.84(2), β 113.44(2), γ
117.11(2)�. Dibromo compound: a 7.999(2), b 7.921(2), c 7.849(2) Ǻ, α
94.37(2), β 112.85(2), γ 115.99(2)�. The copper atoms are
square-planar coordinated with two halide and two base ligands coordinated
necessarily trans by virtue of the siting of the molecule on a centre of
symmetry. Cu-X, Cu-N are 2.264(2), 2.011(3) (dichloro); 2.425(1), 1.997(4)
Ǻ (dibromo). The plane of the lutidine is almost normal to the CuN2X2
plane.
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Hamon DPG, Raston CL, Taylor GF, Varghese JN, White AH. Crystal structure of Tetracyclo[5,3,1,12,6,04,9]dodecane (iceane). Aust J Chem 1977. [DOI: 10.1071/ch9771837] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The crystal structure of
the title compound, C12H18, has been determined at 295 K
by X-ray diffraction and refined by full-matrix least squares to a residual of
0.049 for 216 ?observed? reflections; molecular geometry has been corrected for
the effects of thermal motion using a rigid body approximation. Crystals are
hexagonal, P63/m, a = 6.582(1), c = 11.843(3) Ǻ, Z = 2, the molecules
occupying a hexagonal close- packed array.
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Allen-Williams AJ, Delaney WT, Furina R, Maslen EN, O'Connor BH, Varghese JN, Young Fook Hong. Charge-density analyses for molecular crystals using Bragg diffraction data: the effects of error. ACTA ACUST UNITED AC 1975. [DOI: 10.1107/s0567739475000198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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