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Abstract
Crystals of arsenic tribromide, AsBr3, are orthorhombic, a = 4.33,b = 10.24, c = 12.20 Å, Z = 4, space group P212121. The structure was determined by Patterson and Fourier transform methods from visual intensity data, and the positional and anisotropic thermal parameters were refined by three-dimensional least squares; the final R value was 0.19 for 408 observed reflections. The crystal is built up from discrete AsBr3 molecules, with As–Br = 2.36 ± 0.01 Å, Br–As–Br = 97.7° ± 0.3°. The shortest intermolecular distances are As…Br = 3.72 Å, Br…Br = 3.79 Å, As…As = 4.33 Å.
Published Online: 2010-07-28
Published in Print: 1965-11
