Structural aspects of the synthetic oxygen-carrier NN′-ethylenebis-(salicylideneiminato)cobalt(II). Part II. Crystal and molecular structure of the monopyridine complex
- 1 January 1970
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 2411-2415
- https://doi.org/10.1039/j19700002411
Abstract
The crystal structure of the monopyridine complex of NN′-ethylenebis(salicylideneiminato)cobalt(II), [Co(salen)-(py)], has been determined by a three-dimensional X-ray analysis. The crystals are orthorhombic, space group Cmc21, with a= 20·22, b= 12·44, c= 7·23 Å, Z= 4. The structure was solved by the heavy-atom method and refined by the anisotropic least-squares method to an R of 0·071 using 539 independent reflexions. The crystals consist of [Co(salen)(py)] molecules in which the cobalt atom has a pyramidal co-ordination polyhedron. The apical position is occupied by a pyridine molecule parallel to the CH2–CH2 bond. The two chemically equivalent halves of the ‘salen’ ligand and half of the pyridine molecule are related by a crystallographic mirror plane. The inactivity of this compound towards oxygen absorption in the solid state is discussed on the basis of the crystal packing.Keywords
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