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Rotational Isomerism in Fluorene Derivatives XIV Conformational Equilibria of 9-Substituted 9-(2-Cyanomethylphenyl) fluorene Derivatives

Technology reports of the Yamaguchi University Volume 4 Issue 2 Page 145-150
published_at 1988-12
KJ00004351107.pdf
[fulltext] 316 KB
Title
Rotational Isomerism in Fluorene Derivatives XIV Conformational Equilibria of 9-Substituted 9-(2-Cyanomethylphenyl) fluorene Derivatives
Creators Nishida Akiko
Creators Shirakawa Shinsuke
Creators Harada Toshinao
Creators Fujisaki Shizuo
Creators Kajigaeshi Shoji
Source Identifiers
A series of 9-substituted 9-(2-cyanomethylphenyl) fluorene derivatives such as 9-hydro-(4), 9-bromo-(5), 9-methoxy-(6) and 9-hydroxy-9-(2-cyanomethylphenyl) fluorene (7) were prepared, and their conformational equilibria (ap⇔sp) were investigated on the bases of their H NMR spectra. It was confirmed that 4 existed as equilibrium mixture (ap/sp=1.5/1) at room temperature, and 7 existed predominantly as the ap-conformer (ap/sp=4.4/1) at -50℃, furthermore, both 5 and 6 existed overwhelmingly as the ap-forms at room temperature and at low temperature, respectively.
Subjects
工学 ( Other)
Languages eng
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1988-12
File Version Version of Record
Access Rights open access
Relations
[ISSN]0386-3433
[NCID]AA0086073X
Schools 工学部