ChemInformVolume 20, Issue 24 Preparative Organic Chemistry ChemInform Abstract: Regioselective Liquid-Phase Toluene Nitration with Modified Clays as Catalysts. A. CORNELIS, A. CORNELIS Lab. Chim. Fine Interfaces, Inst. Chim. Org., Univ., 4000 Liege, BelgiumSearch for more papers by this authorA. GERSTMANS, A. GERSTMANS Lab. Chim. Fine Interfaces, Inst. Chim. Org., Univ., 4000 Liege, BelgiumSearch for more papers by this authorP. LASZLO, P. LASZLO Lab. Chim. Fine Interfaces, Inst. Chim. Org., Univ., 4000 Liege, BelgiumSearch for more papers by this author A. CORNELIS, A. CORNELIS Lab. Chim. Fine Interfaces, Inst. Chim. Org., Univ., 4000 Liege, BelgiumSearch for more papers by this authorA. GERSTMANS, A. GERSTMANS Lab. Chim. Fine Interfaces, Inst. Chim. Org., Univ., 4000 Liege, BelgiumSearch for more papers by this authorP. LASZLO, P. LASZLO Lab. Chim. Fine Interfaces, Inst. Chim. Org., Univ., 4000 Liege, BelgiumSearch for more papers by this author First published: June 13, 1989 https://doi.org/10.1002/chin.198924106AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume20, Issue24June 13, 1989 RelatedInformation
Intrinsic formation constants for complexes of Na+ ions with a series of polyamines have been determined from23Na NMR measurements in binary mixtures of tetrahydrofuran (THF) and amines. The results show in a totally unambiguous manner a regular decrease in the magnitude of the chelate effect with the number of atoms intervening between the nitrogen ligators. The key assumption, tetracoordination of the cation, is critically examined, and experimental evidence is adduced in its support.