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本文标题化合物的溶液与晶体的可见-紫外吸收光谱,后者比前者有很大的红移,说明二亚噻喃的π电子体系之间有显著的分子间相互作用.在苯溶液中测得此合物的电偶极矩是1.90D,证明此化合物是顺式构型.
The UV-Vis absorption spectra of the title compound solution and the crystal, which are greatly red-shifted from the former, show that there is a significant intermolecular interaction between the bis-thiopyran π electron systems. The dipole moment of this compound is 1.90D, which indicates that the compound is in cis configuration.