ISSN:
1572-8854
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The crystal and molecular structure of 4,4′-dichloro-diphenyl sulphone (A), 4,4′-dibromodiphenyl sulphone (B) and 4,4′-diiododiphenyl sulphone (C) have been determined from three-dimensional MoKα. diffractometer data. These structures are isomorphous in the monoclinic space groupI2/a, with four molecules per unit-cell. The cell dimensions ofA,B andC area = 20.216 (4),b = 5.004(1),c = 12.248(2) Å, β = 90 °34′(1);a = 20.813(10),b = 5.055(3),c = 12.421(9) Å, β = 92 °46′(2) anda = 19.762(8),b = 4.947(2),c = 14.480(5) Å, β =103 ° 18′(1), respectively. Least-squares refinements converged toR-factors of 6.0% over 925 reflections, 6.8% over 1273 reflections and 3.8% over 995 reflections forA,B andC, respectively. The S—O bond lengths are 1.432(3), 1.453(5) and 1.445(7) Å and the S—C bond lengths 1.766(4), 1.764(6) and 1.756(7) Å inA,B andC, respectively. The C—Cl, C—Br and H—-I bond lengths are 1.748(5), 1.905(6) and 2.103(7) Å, respectively. The dihedral angle between the plane of each aromatic ring and the C—S—C plane is 84.6 ° inA, 83.8 ° inB and 86.9 ° inC. Intermolecular Br―Br and I―I contacts of 3.65 and 3.90 Å are considerably shorter than the van der Waals contacts given by Pauling.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01636043
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