Transition Metal Chemistry of Quinuclidinone-Containing Ligands. V. Crystal Structure of Dichloro[trans-2-(2-quinolyl)methylenequinuclidin-3-one]cobalt(II)
The crystal structure of the title compound has been determined from 2829 independent reflections measured by diffractometer. Crystals are triclinic, space group P1, with the (non-conventional) unit-cell parameters, a = 9.492(4), b = 9.754(5), c = 9.243(5) Å, α = 89.91(5)°, ß = 90.28(5)°, γ = 108.30(2)°, and Z = 2. The structure was solved by Patterson and Fourier techniques, and refined by full-matrix least-squares methods to R = 3.4%. The compound consists of cobalt(II) ions co-ordinated in a pseudotetrahedral manner to the two nitrogen donor atoms in the ligand and to the two chloride ions. The two Co-Cl distances are slightly different [2.219(1) and 2.227(1) Å], and the Co-N (quinoline) bond distance [2.014(2) Å] is somewhat shorter than Co-N (quinuclidinone) [2.064(2) Å]. The bond angles about Co are distorted from their pure tetrahedral value, the smallest being [100.35(9)°] the chelate 'bite' angle. The ligand is almost planar (excluding the two ethylene bridges), and the molecule therefore possesses an approximate mirror plane bisecting the Cl-Co-Cl angle.
G. J. Long and E. O. Schlemper, "Transition Metal Chemistry of Quinuclidinone-Containing Ligands. V. Crystal Structure of Dichloro[trans-2-(2-quinolyl)methylenequinuclidin-3-one]cobalt(II)," Journal of the Chemical Society, Dalton Transactions, no. 2, pp. 96-100, Royal Society of Chemistry, Jan 1975.
The definitive version is available at http://dx.doi.org/10.1039/DT9750000096
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