Pyridine-type complexes of transition-metal halides. III: Structural and thermal relationships among the cobalt(II) complexes with halide ions and 2-, 3-, and 4-Methylpyridine, the crystal structure of dibromotetrakis (3-methylpyridine)cobalt(II)

G. Kenessey, L. Párkányi, P. E. Werner, G. M. Keserü, T. Wadsten, L. Bihátsi, G. Liptay

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The correlation between structure and thermal properties of halogeno methylpyridine cobalt(II) is described. The ternary mixed tetrakis-derivatives and the tetrahedral bis-complexes of cobalt(II) chlorides and bromides formed with picolines are structurally very similar to the cadmium(II) and nickel(II) analogues, the iodides are somewhat different, however. On the basis of the characteristic correlation between the densities calculated from powder diffraction data and the molecular weights, the densities of a few thermal intermediates, which have not yet been prepared, are predicted. The square bipyramidal structure of dibromotetrakis(3-methylpyridine)cobalt(II) is described, and the deformation of the octahedra is discussed in detail. Structural study was extended by molecular mechanics (MM+ and MMX) and molecular orbital (SINDO1) calculations.

Original languageEnglish
Pages (from-to)123-128
Number of pages6
JournalStructural Chemistry
Volume5
Issue number2
DOIs
Publication statusPublished - Apr 1 1994

Keywords

  • Transition-metal halide methylpyridine complexes
  • X-ray crystallography
  • X-ray powder diffraction
  • molecular mechanics and molecular orbital calculations
  • thermal analysis

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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