Monomer–Dimer solution equilibria of 2,4,6-trialkylnitrosobenzenes and 2,4,6-trialkylnitrosobenzene/nitrosobenzene mixtures. A study using one- and two-dimensional NMR techniques
作者： Keith G. Orrell , David Stephenson , James H. Verlaque
DOI: 10.1039/P29900001297
关键词:
摘要: 2,4,6-Trimethylnitrosobenzene in CDCI3 exists as a mixture of monomer and Z- E-azodioxy dimers. The dissociation kinetics both dimers were measured by one-dimensional time-dependent NMR spectroscopy on non-equilibrium solutions, two-dimensional exchange (2D-EXSY) equilibrium solutions. 2,4,6-Tri-t-butylnitrosobenzene is entirely monomeric CDCl3 but forms mixed azodioxy the presence nitrosobenzene. E-dimer followed techniques. activation energy parameters for these equilibria compared with previous data related nitrosobenzene dimethylnitrosobenzene systems.
rsc.org
sci-hub.se 参考文章(24)
Keith G. Orrell, David Stephenson, Thierry Rault, NMR study of the monomer-dimer equilibria of dimethylnitrosobenzenes in solution. Identification of mixed azodioxy dimeric species Magnetic Resonance in Chemistry. ,vol. 27, pp. 368- 376 ,(1989) , 10.1002/MRC.1260270413
S. Macura, R.R. Ernst, Elucidation of cross relaxation in liquids by two-dimensional N.M.R. spectroscopy Molecular Physics. ,vol. 41, pp. 95- 117 ,(1980) , 10.1080/00268978000102601
Edward W Abel, Timothy P.J Coston, Keith G Orrell, Vladimir Šik, David Stephenson, Two-dimensional NMR exchange spectroscopy. Quantitative treatment of multisite exchanging systems Journal of Magnetic Resonance. ,vol. 70, pp. 34- 53 ,(1986) , 10.1016/0022-2364(86)90361-6
Shigeru Terabe, Ryusei Konaka, Spin trapping by use of nitroso-compounds. Part V. 2,4,6-Tri-t-butylnitrosobenzene: a new type of spin-trapping reagent Journal of The Chemical Society-perkin Transactions 1. pp. 369- 374 ,(1973) , 10.1039/P29730000369
Dalziel Ll. Hammick, William A. M. Edwards, Walter S. Illingworth, Frederick R. Snell, 172. The existence of aromatic bisnitroso-compounds of the type R′N2O2R″ Journal of The Chemical Society (resumed). pp. 671- 674 ,(1933) , 10.1039/JR9330000671
CECILY DARWIN, DOROTHY CROWFOOT HODGKIN, Crystal Structure of the Dimer of para-Bromonitrosobenzene Nature. ,vol. 166, pp. 827- 828 ,(1950) , 10.1038/166827A0
Michel Azoulay, Birgitta Stymne, Gunnar Wettermark, Preparation, spectroscopic assignments and relative stabilities of cis and trans species of o,o′-azodioxytoluene in the solid state and in solution Tetrahedron. ,vol. 32, pp. 2961- 2966 ,(1976) , 10.1016/0040-4020(76)80153-6
E.R. Andrew, The narrowing of NMR spectra of solids by high-speed specimen rotation and the resolution of chemical shift and spin multiplet structures for solids Progress in Nuclear Magnetic Resonance Spectroscopy. ,vol. 8, pp. 1- 39 ,(1971) , 10.1016/0079-6565(71)80001-8
David A. Dieterich, Iain C. Paul, David Y. Curtin, Structural studies on nitrosobenzene and 2-nitrosobenzoic acid. Crystal and molecular structures of cis-azobenzene dioxide and trans-2,2'-dicarboxyazobenzene dioxide Journal of the American Chemical Society. ,vol. 96, pp. 6372- 6380 ,(1974) , 10.1021/JA00827A021
Michel Azoulay, Ernst Fischer, Low-temperature proton nuclear magnetic resonance and ultraviolet absorption spectra and photochemistry of the system nitrosobenzene–azodioxybenzene and its methyl derivatives Journal of The Chemical Society-perkin Transactions 1. ,vol. 13, pp. 637- 642 ,(1982) , 10.1039/P29820000637