Structural Investigation by Means of Nuclear Quadrupole Resonance III : Arsenic Tribromide

概要

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The structure of AsBr_3 is investigated by means of nuclear quadrupole resonance at about 10℃, and is compared with Braekken's results of X-ray analysis. AsBr_3 has the orthorhombic symmetry, and the Br-As-Br bond angles are 99°38'±16', 99°14'±18' and 102°51'±13'. The polar angles specifying the directions of the As-Br bonds with respect to the crystal axes are (62°4'±13', 56°9'±8'), (64°7'±15', -61°46'±11'), and (61°54'±8', 180°50'±20). The bond angles are larger than those of Braekken by about 1°. The asymmetry parameter of field gradient at the bromine nucleus is about 0.04±0.02. Single, double, and ionic character of As-Br bond are 61.4%, 1.2% and 37.4%, respectively, and the bond length is deduced to be 3.20 A. These results are consistent with those of X-ray analysis except the slight disagreement in the bond angles.
社団法人日本物理学会の論文
1957-12-05