Journal ArticleDOI
Structural aspects of the synthetic oxygen-carrier NN′-ethylenebis-(salicylideneiminato)cobalt(II). Part II. Crystal and molecular structure of the monopyridine complex
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In this paper, 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.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 A, 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.read more
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Journal ArticleDOI
Advancement in stereochemical aspects of Schiff base metal complexes
TL;DR: In this paper, the authors look back upon the development of coordination chemistry in the past several decades, during the career of the author, and possibly see how and through what accomplishments the present coordination chemistry has been built up.
Book ChapterDOI
Nature and dynamics of the spin-state interconversion in metal complexes
TL;DR: In this article, the Bragg and Williams approximation of the Ising model is used to describe spin-state transitions in metal complexes which are driven by a change of temperature T or pressure p are always associated with a considerable reorganization of molecular geometry, the change involves metal-ligand bond lengths R, bond angles and a variation of ligand orientation.
Journal ArticleDOI
N,N'-ethylenebis(salicylideneiminato) transition metal ion chelates
M.D. Hobday,Thomas D. Smith +1 more
Journal ArticleDOI
Linear Tricobalt Compounds with Di(2-pyridyl)amide (dpa) Ligands: Temperature Dependence of the Structural and Magnetic Properties of Symmetrical and Unsymmetrical Forms of Co3(dpa)4Cl2 in the Solid State
Rodolphe Clérac,F. Albert Cotton,Lee M. Daniels,Kim R. Dunbar,Kristin Kirschbaum,Carlos A. Murillo,A. Alan Pinkerton,and Arthur J. Schultz,Xiaoping Wang +8 more
TL;DR: The linear trinuclear compound Co3(dpa)4Cl2 (1; dpa = di(2-pyridyl)amide anion) crystallizes from CH2Cl2 solution in two forms simultaneously as mentioned in this paper.
Journal ArticleDOI
Structure of a Monomeric Oxygen-carrying Complex
G. A. Rodley,Ward T. Robinson +1 more
TL;DR: The structure of a cobalt oxygen complex, analogous to Co(acacen)(B)O2, that provides information on the metal–oxygen linkage, relevant to the structures of oxymyoglobin and oxyhaemoglobin is reported.
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