:How long a C–C bond can be? An example of extraordinary long C–C single bond in 1,2-diarylamino-o-carborane论文

:How long a C–C bond can be? An example of extraordinary long C–C single bond in 1,2-diarylamino-o-carborane论文

本文主要研究内容

作者(2019)在《How long a C–C bond can be? An example of extraordinary long C–C single bond in 1,2-diarylamino-o-carborane》一文中研究指出:How long a C-C bond can be? A question has long fascinated chemists. This work reports an example of extraordinary long C-C bond distance of 1.990(4) ? observed in single-crystal X-ray structure of 1,2-(NHMes)2-o-carborane(2; Mes = 2,4,6-trimethylphenyl). DFT calculations show that hyperconjugation of lone pairs of the nitrogen atoms into the empty σ~* orbital of the cage C-C bond is the origin of the bond elongation. Such hyperconjugation can be suppressed if the two nitrogen atoms in 2 are linked to a Lewis acidic germanium(Ⅱ) center.

Abstract

How long a C-C bond can be? A question has long fascinated chemists. This work reports an example of extraordinary long C-C bond distance of 1.990(4) ? observed in single-crystal X-ray structure of 1,2-(NHMes)2-o-carborane(2; Mes = 2,4,6-trimethylphenyl). DFT calculations show that hyperconjugation of lone pairs of the nitrogen atoms into the empty σ~* orbital of the cage C-C bond is the origin of the bond elongation. Such hyperconjugation can be suppressed if the two nitrogen atoms in 2 are linked to a Lewis acidic germanium(Ⅱ) center.

论文参考文献

  • [1].Evanescent wave of extraordinary beam at uniaxial crystal surfaces[J]. 贾光一.  Optoelectronics Letters.2011(03)
  • [2].Spatial modulation of Gaussian beam in BaTiO3:Ce crystal with external electric field[J]. 谢平,戴建华,武建劳,杨乾锁,王鹏业,朱镛,张洪钧.  Science in China,Ser.A.1996(11)
  • [3].Graphene—From basic science to useful technology[J]. Zhongfan Liu.  National Science Review.2015(01)
  • [4].Professor Henry N.C. Wong, extraordinary synthetic chemist and great mentor[J]. Zhen Yang,Xuechen Li.  Chinese Chemical Letters.2019(08)
  • [5].其它[J].   中国光学与应用光学文摘.1997(01)
  • [6].Wafer-Thin Electronics[J]. ALEXER STIRN.  Bulletin of the Chinese Academy of Sciences.2014(02)
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