Bulletin of the Chemical Society of Japan · 1952 · 92 citations · 3 references
Natural SciencesChemistryCrystal StructureInorganic ChemistryPhysical ChemistryCrystal ChemistryCrystal LatticeCrystal SymmetryCrystallographyMolecular SymmetryStructure DeterminationCrystal Structure AnalysisCrystal Structure DeterminationCrystal Symmetry AnalysisCrystal Symmetry DeterminationMonoclinic LatticesMonoclinic SystemUnit Cell DeterminationUnit Cell Geometry
Abstract The crystal structure of trans-dichlorodiethylenediamine-cobalt (III) chloride hydrochloride has been determined using the rotation method (Fe Kαλ=1.937 a.). The substance crystallizes in a monoclinic lattice with two formula units in the unit cell, the dimensions of which are a= 10.68 a., b=7.89 a., c=9.09 a. with β=110°26. The determined structure seems most easily described as consisting of layers of [Coen2Cl2]+ ions parallel to the plane (100) and those of Cl−, H2O and H+. Two chlorine atoms are co-ordinated to a cobalt atom in trans-positions. The line joining them is perpendicular to the plane in which four nitrogen atoms are found to lie. The dimensions of a complex ion are given. The water molecules probably form a group [H2O···H···H2O]+ together with a proton, O···O distance being 2.66 a. These groups are located between them. The dichroism of the crystal is, discussed on the basis of the determined structure.
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