Structures,Aromaticity and Raman Spectroscopy of Double Hanging Ring Molecules[(GnHn-1^m)(GnHn-1^m)](G=C,Si,Ge;n=3,5,6,7,8;m=+1,-1,0,+1,+2)  

作　　者：SHEN Chen-Fei LIU Zi-Zhong LIU Hong-Xia HAN Li-Nan 沈臣飞;刘子忠;刘红霞;韩立楠(Chemistry and Environment Science College,Inner Mongolia Normal University,Inner Mongolia Key Laboratory of Green Catalysis,Hohhot,Inner Mongolia 010022,China;School of Chemistry and Molecular Engineering,East China Normal University,Shanghai 200062,China)

机构地区：[1]Chemistry and Environment Science College,Inner Mongolia Normal University,Inner Mongolia Key Laboratory of Green Catalysis,Hohhot,Inner Mongolia 010022,China [2]School of Chemistry and Molecular Engineering,East China Normal University,Shanghai 200062,China

出　　处：《Chinese Journal of Structural Chemistry》2020年第2期214-228,184,共16页结构化学（英文）

基　　金：Supported by the National Natural Science Foundation of China(No.21563023);the Graduate Education Innovation Program funded Projects of Inner Mongolia(No.S20161013506);inner Mongolia Normal University Graduate Students'Research&Innovation Fund(No.CXJJS16090)。

摘　　要：Theoretical calculations of Double Hanging Ring Molecule(DHRM) [(GnHn-1^m)(GnHn-1^m)](G=C,Si,Ge;n=3,5,6,7,8;m=+1,-1,0,+1,+2) were performed via Gaussian 09 with the method of Density Functional Theory(DFT). Geometrical optimization, Potential Energy surface Scan(PES), Degree of Aromaticity(DOA) and Nucleus Independent Chemical Shift(NICS) were computed to study the optimal structures and aromaticity of DHRMs. Ring Stretching Vibration Raman Spectroscopy(RSVRSF) was predicted to seek the relation between RSVRSF and aromaticity of DHRMs. The results show optimal structures of DHRMs[(GnH(n-1)~m)(GnH(n–1)~m)](n = 3, 5~8);DA = 90° is the stable structure when n = 3, 7, 8;while n = 5 corresponds to DA = 30°, n = 6 corresponds to DA = 50°;the correlation between DOA and NICS of DHRMs is quadratic;the value of RSVRSF of DHRM approximates to its corresponding single ring molecule, which could act as characteristic frequency of ring molecule to identify its aromaticity;the correlation between RSVRSF and DOA is quadratic, and that between RSVRSF and NICS is linear.

关 键 词：DOUBLE HANGING RING molecule(DHRM) degree of aromaticity(DOA) nucleus independent chemical Shift(NICS) RING stretching vibration Raman spectroscopy(RSVRSF) 

分 类 号：O625[理学—有机化学] O641.121[理学—化学]