NUCLEAR QUADRUPOLE RESONANCE ZEEMAN STUDY OF POLYCRYSTALLINE GROUP 4A TETRACHLORIDES

被引:20
作者
GRAYBEAL, JD
GREEN, PJ
机构
[1] Department of Chemistry, West Virginia University, Morgantown
[2] Virginia Polytechnic Institute, Blacksburg
关键词
D O I
10.1021/j100843a029
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The asymmetry parameters of the electric field gradients at the chlorine nuclei in four group IVa tetrachlorides have been determined by employing a polycrystalline Zeeman analysis of their nuclear quadrupole resonance transitions. The parameters found were: CCl4 (<0.10), SiCl4 (0.45), GeCl4 (0.35), and SnCl4 (0.25). The magnitudes of these parameters for the latter three compounds are larger than can be rationalized on the basis of intermolecular bonding alone. It is believed that these large values provide additional evidence for the existence of dπ-pπ bonding in these compounds.
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页码:2948 / &
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