Crystal and molecular structures oftrans-dichloro-(ethylene) (4-methylpyridine)platinum(II) andtrans-dichloro(ethylene) (2,4,6-trimethylpyridine)platinum(II) |
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Authors: | F Caruso R Spagna L Zambonelli |
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Institution: | (1) Laboratorio di Strutturistica Chimica Giordano Giacomello CNR, Area della Ricerca, C.P. 10, 00016 Monterotondo Stazione (Roma), Italy |
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Abstract: | The crystal and molecular structures oftrans-PtCl2(C2H4)(4-MeC5H4N)] (I) andtrans-PtCl2(C2H4)(2,4,6-Me3C5H2N)] (II) have been determined by single-crystal x-ray methods.I crystallizes in space groupP21/c witha= 4.991(1), b=21.658(3), c=10.675(3) Å, =110.17(2) °,Z=4;II is orthorhombic (Pbca) witha=10.295(6),b=12.393(8),c=20.370(10) Å,Z=8.Full-matrix least-squares refinements have given finalR factors of 0.053 (1520 reflections) forI and 0.042. (1412 reflections) forII. The intensities were recorded by counter methods, and only those reflections havingI>3(I) were used in the analyses.In both complexes, platinum is four-coordinate with the two chlorine atoms, the double bond of the ethylene, and the nitrogen atom of the substituted pyridine. The two structures are discussed in terms of the arrangement of the pyridine ligand with respect to the PtCl2(C2H4) moiety. |
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