Probing Hyperconjugative Aromaticity of Monosubstituted Cyclopentadienes
Probing Hyperconjugative Aromaticity of Monosubstituted Cyclopentadienes
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探讨单取代环戊二烯的超共轭芳香性
DOI:
10.1002/ajoc.201800680
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发表时间:
2018-12
期刊:
影响因子:
--
通讯作者:
Jun Zhu
中科院分区:
文献类型:
--
作者:
Qiong Xie;Tingting Sun;Mesías Orozco-Ic;Jorge Barroso;Yu Zhao;Gabriel Merino;Jun Zhu
Hyperconjugation and aromaticity are two of the most important concepts in chemistry. Mulliken and coworkers combined both terms to explain the stability of cyclopentadiene. Here, we carried out DFT calculations on a series of mono- and disubstituted cyclopentadiene derivatives to investigate their hyperconjugative aromaticity. Our results revealed that one electropositive substituent can induce aromaticity, whereas one electronegative substituent prompts nonaromaticity rather than antiaromaticity. When an electronegative substituent and a transition metal as an electropositive substituent were considered simultaneously, a slightly aromatic cyclopentadiene ring could be achieved, whereas an electropositive substituent of the main group in combination with an electronegative one will produce a nonaromatic cyclopentadiene ring.
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