Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/107137
Type: Artigo de periódico
Title: Axial/equatorial Populations In α-hetero-substituted Cyclohexanone Oximes And O-methyl Oximes
Author: Ribeiro D.S.
Olivato P.R.
Rittner R.
Abstract: Axial equatorial populations were determined for (E)-2-X-cyclohexanone oximes and O-methyl oxime ethers in chloroform by the Eliel method [X = F, Cl, Br, OCH3, N(CH3)2, SCH3]. A novel approach is presented, which uses 1H NMR data from the protons bonded to C-6. The conformational proportions were also obtained from the C-4 chemical shifts, the Z-isomer spectral parameters being taken as reference for calculation. For both series, all substituents adopt preferentially the axial conformation (86-96%), but the O-methyl oxime ethers present an enhanced axial population compared with the corresponding oximes, owing to the accepted occurrence of a πC=NOH//σ*CX stabilizing interaction. Copyright © 2000 John Wiley & Sons, Ltd.
Editor: 
Rights: fechado
Identifier DOI: 
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-0034239438&partnerID=40&md5=0b40f947b3eb9a37f4ef79feef60b876
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
2-s2.0-0034239438.pdf161.2 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.