"8"^^ . . "Pataridis, Statis" . "Tkadlecov\u00E1, Marcela" . . . . . . . . . "Blechta, V." . "Ring-substituted benzohydroxamic acids: 1H, 13C and 15N NMR spectra and NH-OH proton exchange" . "000229841700005" . . . . "7"^^ . "Ring-substituted benzohydroxamic acids: 1H, 13C and 15N NMR spectra and NH-OH proton exchange"@en . "Magnetic Resonance in Chemistry" . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . "RIV/60461373:22340/05:00022520!RIV10-MSM-22340___" . "541152" . . "43" . . . "0749-1581" . . "Exner, O." . "RIV/60461373:22340/05:00022520" . . "[284991C456F6]" . . . "Roithov\u00E1, Jana" . "3"^^ . "Schraml, Jan" . "NMR spectra (H-1, C-13, N-15) of para- and meta-substituted benzohydroxamic acids were studied in dry dimethyl sulfoxide solutions. The C-13 chemical shifts were very close to those found by cross-polarization magic angle spinning in solids, the hydroxamic (not hydroximic) structure of which is unambiguous. The hydroxamic structure of these acids in DMSO solutions was proved independently by their N-15 chemical shifts. The N-15 and H-1 chemical shifts of the NH-OH fragment showed excellent mutual dependences and dependences on the nature of the ring substituent. According to these dependences and ab initio energy calculations, all the acids assume the same Z conformation. Proton exchange between hydroxamic OH and NH groups in DMSO proceeded by both intra- and intermolecular exchange and the rates did not exhibit any simple relationship to the substituent constants." . "Ring-substituted benzohydroxamic acids: 1H, 13C and 15N NMR spectra and NH-OH proton exchange" . . "NMR, 1H NMR; 13C NMR; 15N NMR; substituted benzhydroxamic acids; chemical shifts; substituent effects; proton exchange"@en . . . "NMR spectra (H-1, C-13, N-15) of para- and meta-substituted benzohydroxamic acids were studied in dry dimethyl sulfoxide solutions. The C-13 chemical shifts were very close to those found by cross-polarization magic angle spinning in solids, the hydroxamic (not hydroximic) structure of which is unambiguous. The hydroxamic structure of these acids in DMSO solutions was proved independently by their N-15 chemical shifts. The N-15 and H-1 chemical shifts of the NH-OH fragment showed excellent mutual dependences and dependences on the nature of the ring substituent. According to these dependences and ab initio energy calculations, all the acids assume the same Z conformation. Proton exchange between hydroxamic OH and NH groups in DMSO proceeded by both intra- and intermolecular exchange and the rates did not exhibit any simple relationship to the substituent constants."@en . . . "Ring-substituted benzohydroxamic acids: 1H, 13C and 15N NMR spectra and NH-OH proton exchange"@en . "P(GA203/03/1566), P(IAA4072005), P(IAA4072605), P(LB98233), S, Z(AV0Z40720504)" . "22340" . . . "7" . . . "Soukupov\u00E1, L." .