ID 1414
FullText File
Title Alternative
On the Substituent-induced Chemical Shifts of the Side Chain Carbons in the para-Substituted Propylbenzenes, 2-Methylpropylbenzenes, and 2, 2-Dimethylpropylbenzenes
Authors
Kusuyama, Yoshiaki
Fukunaga, Megumi
Kamatani, Misako
Arimoto, Kayo
Hashimoto, Rina
Yukawa, Shinako
Morioka, Hidehito
Yamabata, Shinji
Teragishi, Etsu
Takiguchi, Mieko
Inoue, Yasue
Amatu, Kazumi
DOI
Journal Title
Bulletin of the Faculty of Education, Wakayama University. Natural science
ISSN
13424645
NCID
AN00257977
Volume
54
Start Page
17
End Page
22
Published Date
2004-02-27
Language
eng
Abstract
標記の化合物の炭素-1 3核磁気共鳴スペクトルを測定し、側鎖炭素の化学シフト(SCS)を決定した。A, Bの2-位の炭素は置換基電子効果の解釈では逆の方向性を示し、Aにおいて顕著であった。他方Cの2-位の炭素は正の方向性を示した。A, BにおけるC_2の置換基効果は2位の炭素-水素結合の分極により生じたものである。
Abstract Alternative
The substituent-induced chemical shifts (SCS) for the side chain carbons in a number of the para substituted propylbenzenes (A), 2-methylpropylbenzenes (B), and 2, 2-dimethylpropylbenzenes (C) were determined. The SCS of C_2 (β-position to the ring) of A showed clearly an inverse trend in the sense of the substituent electronic effect as good as SCS (^<13>CH_3) of p-substituted ethylbenzenes. SCS (C_2) of B for electron attracting groups by resonance exhibited also an inverse trend while the magnitudes were very small. SCS (C_2) of C showed a normal trend. It was confirmed that the most important factor for the inversed SCS for SCS (C_2) for the ethylbenzenes, A, and B was the polarization of the C_2-H bond induced by the substituted phenyl moiety.
Content Type
Departmental Bulletin Paper
Text Version
publisher
Accession No.
KJ00004258254