Structure and Solid-State Reactivity of a New Polymorph of Tetrakis(4-Vinylpyridine)-Diisothiocyanatocobalt(II).

Abstract

The crystal structure of Co(NCS)24-vinylpyridine4 has been determined by X-ray diffraction methods. The complex crystallizes in space group Pbca, with a = 32.293 (15) A, b = 11.416(6) A, c = 17.033(10) A, and Z = 8. Full-matrix least-squares refinement of positional and thermal parameters for all atoms (H atoms fixed at calculated positions), with 1458 reflections (F > 3.92 sigma (F)) led to R = 0.075 and RW = 0.079. The trans-octahedral complex consists of four vinylpyridine ligands, arranged in a propeller-shape, and two isothiocyanate ligands. Powder diffraction of Co(NCS)2(4-vinylpyridine)2 indicates an isometric cell, with a = 13.77 A. The analogous Ni(II) complexes are isomorphous with the Co(II) complexes, suggesting that the yellow-green complex Ni(NCS)2(4-vpy)2, previously thought to be polymeric, is in fact tetrahedral. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1981
Accession Number
ADA112254

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  • Bruce M. Foxman
  • Harry Mazurek

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  • Brandeis University

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