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The complete 1H, 13C and 15N NMR assignments of two closely related quinoacridinium salts, 8,13-diethyl-6-methyl-8H-quino[4,3,2-kl]acridinium iodide and, 8,13-diethyl-3,6,11-trimethyl-8H-quino[4,3,2-kl]acridinium iodide, are described. The multinuclear 1D NMR and 2D shift-correlated NMR techniques HMQC, HSQC and HMBC were applied, accompanied by ab initio GIAO CPHF calculations of shielding constants.
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Jaroszewska-Manaj et al. (2000) studied this question.
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