摘要
用沸点升高法测定了卤化四丁铵在有机溶剂中的平均聚集度。发现溴化四丁铵在苯中的聚集度远大于在氯仿中的。说明溶剂的极性起着首要作用。在氯仿中聚集度的大小顺序为碘化四丁铵>溴化四丁铵>氰化四丁铵。 还测定了溴化与碘化四丁铵混合溶液的聚集度。测得值显著大于它们单独存在时的值。认为存在离子对的渔合聚集体。
The average aggregation number (A) of tetrabutylammonium halides in organic solvent has been determined ebulliometrically. A of tetrabutylammonium bromide in benzene is much larger than that in chloroform (Fig.1), it seems that the polarity of the solvent is the major factor.In chloroform, A decreases in the order. iddide>bromide>chloride (Fig.2).When the quaternary ammonium salts exist as mixtures under phase-transfer reaction conditions, and A of the mixed bromide and iodide is determined and is found larger than each alone when there were no interaction between different ion pairs. We consider the ion pairs existing as mixture aggregate (see Table).
作者
沈雨生
刘玺玉
刘景君
刘秀杰
Shen Yusheng;Liu Xiyu;Liu Jinjun;Liu Xiujie(Department of Chemistry,Jilin University,Changchun)
出处
《高等学校化学学报》
SCIE
EI
CAS
1983年第4期504-506,共3页
Chemical Journal of Chinese Universities
