曲靖师范学院学报
麯靖師範學院學報
곡정사범학원학보
JOURNAL OF QUJING NORMAL COLLEGE
2012年
3期
23-26
,共4页
氢键%卤键%理论研究
氫鍵%滷鍵%理論研究
경건%서건%이론연구
hydrogen - bond%halogen - bond%theoretical study
通过MP2/aug—cc—pVDZ理论方法计算研究了C6H5X·Y-(x,Y=F,Cl,Br,I)体系中的氢键和卤键.计算表明所有的卤代苯都能与卤素离子形成氢键相互作用,氢键强度顺序为:C6H,F〈C6H5C1〈C6H5Br〈C6H5I;F-〉Cl-〉Br-〉I-.C6H5Cl,C6H5Br,C6H5I能与卤素离子形成卤键相互作用,卤键强度顺序为:C6H5Cl〈C6H5Br〈C6H5I;F-〉Cl-〉Br-〉I-.分析结果可以发现体系中的卤键强度差异要大于氢键,说明在此体系中卤键具有比氢键更大的选择性.
通過MP2/aug—cc—pVDZ理論方法計算研究瞭C6H5X·Y-(x,Y=F,Cl,Br,I)體繫中的氫鍵和滷鍵.計算錶明所有的滷代苯都能與滷素離子形成氫鍵相互作用,氫鍵彊度順序為:C6H,F〈C6H5C1〈C6H5Br〈C6H5I;F-〉Cl-〉Br-〉I-.C6H5Cl,C6H5Br,C6H5I能與滷素離子形成滷鍵相互作用,滷鍵彊度順序為:C6H5Cl〈C6H5Br〈C6H5I;F-〉Cl-〉Br-〉I-.分析結果可以髮現體繫中的滷鍵彊度差異要大于氫鍵,說明在此體繫中滷鍵具有比氫鍵更大的選擇性.
통과MP2/aug—cc—pVDZ이론방법계산연구료C6H5X·Y-(x,Y=F,Cl,Br,I)체계중적경건화서건.계산표명소유적서대분도능여서소리자형성경건상호작용,경건강도순서위:C6H,F〈C6H5C1〈C6H5Br〈C6H5I;F-〉Cl-〉Br-〉I-.C6H5Cl,C6H5Br,C6H5I능여서소리자형성서건상호작용,서건강도순서위:C6H5Cl〈C6H5Br〈C6H5I;F-〉Cl-〉Br-〉I-.분석결과가이발현체계중적서건강도차이요대우경건,설명재차체계중서건구유비경건경대적선택성.
The hydrogen -bond and halogen -bond in C6H5 X . Y- (X, Y = F, Cl, Br, I) have been studied at the MP2/aug - cc - pVDZ level. The computational results indicate that all the C6H5X can interact with Y - by hydrogen- bond. The hydrogen- bond.strength changes in this order,C6H5F 〈 C6H5Cl 〈 C6H5Br 〈 C6H5I; F- 〉 Cl- 〉 Br- 〉 I-. C6H5Cl,C6H5Br,C6H5I can interact with Y- by halogen-bond. The halogen -bond strength changes in this order, C6H5Cl 〈 C6H5Br 〈 C6H5I; F- 〉 Cl- 〉 Br- 〉 I-. The halogen- bond in this system is more selective than hydrogen- bond.