Bulletin of the Chemical Society of Japan · 1973 · 26 citations · 6 references
Natural SciencesChemistryComputational ChemistryCrystal StructureMaterials ChemistryCrystal ChemistryCrystal LatticeCrystal SymmetryCrystallographyStructure DeterminationX-ray DiffractionCrystal Structure AnalysisCrystal Structure DeterminationCrystal Symmetry AnalysisCrystal Symmetry DeterminationCrystallographic Symmetry AnalysisForm Ii PolymorphsMolecular CrystallographyMonoclinic Unit Cells
Abstract The crystal structures of methylene dibromide and methylene diiodide (Form II) have been determined by the X-ray diffraction method at about −90°C and about −20°C respectively. Both the crystals are isomorphous, with monoclinic space group C2h6–C2/c. Unit cells containing eight molecules have these dimensions: a=12.239(12), b=4.459(15), c=15.212(16) Å, and β=113.54(7)° for methylene dibromide, and a=13.346(3), b=4.720(90), c=16.479(5) Å, and β=114.48(8)° for methylene diiodide. The orientations of the methylene groups have been obtained by lattice-energy calculations.
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The crystal structure of bromoform, CHBr3
Takemi Kawaguchi, K. Takashina, T. Tanaka et al. · Acta Crystallographica Section B · 1972 · 36 citations