. "Struktura azokopulovan\u00FDch N-alkyl enaminon\u016F odvozen\u00FDch od acetylacetonu a benzoylacetonu v pevn\u00E9 f\u00E1zi a v roztoku"@cs . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . "A series of azo coupling products have been prepared by reaction of substituted benzenediazonium tetrafluoroborates with N-alkyl 4-aminopent-3-en-2-ones or 3-amino-1-phenylbut-2-en-1-ones. The structure and tautomerism of the reaction products were studied by means of single-crystal X-ray study and by NMR spectroscopy in deuteriochloroform solution. The azo coupling products obtained from 4-methylaminopent-3-en-2-ones (3a?i) exist in CDCl3 solution as E/Z isomer mixtures with the Z isomer strongly predominating. The major isomer is a mixture of enamino?azo and imino?hydrazo tautomers with the former predominating. The proportion of the azo form depends on substitution of the benzene ring of the diazonium salt and decreases in the order of MeO > Me > Br > NO2. The position of tautomeric equilibrium is practically unaffected by switching from 4-methylaminopent-3-en-2-ones to 3-methylamino-1-phenylbut-2-en-1-ones. In the solid phase, the azo form always predominates; substitution of diazonium sa" . "azo coupling; N-alkylenaminones; X-Ray; NMR"@en . "A series of azo coupling products have been prepared by reaction of substituted benzenediazonium tetrafluoroborates with N-alkyl 4-aminopent-3-en-2-ones or 3-amino-1-phenylbut-2-en-1-ones. The structure and tautomerism of the reaction products were studied by means of single-crystal X-ray study and by NMR spectroscopy in deuteriochloroform solution. The azo coupling products obtained from 4-methylaminopent-3-en-2-ones (3a?i) exist in CDCl3 solution as E/Z isomer mixtures with the Z isomer strongly predominating. The major isomer is a mixture of enamino?azo and imino?hydrazo tautomers with the former predominating. The proportion of the azo form depends on substitution of the benzene ring of the diazonium salt and decreases in the order of MeO > Me > Br > NO2. The position of tautomeric equilibrium is practically unaffected by switching from 4-methylaminopent-3-en-2-ones to 3-methylamino-1-phenylbut-2-en-1-ones. In the solid phase, the azo form always predominates; substitution of diazonium sa"@en . "Pretto, Loretta" . "3"^^ . . "1144-0546" . "New Journal of Chemistry" . . . . "Mach\u00E1\u010Dek, Vladim\u00EDr" . "Structure of Azo Coupling Products from N-Alkylenaminones Derived from Acetylacetone and Benzoylacetone in Solid Phase and in Solution" . . . "3" . "Structure of Azo Coupling Products from N-Alkylenaminones Derived from Acetylacetone and Benzoylacetone in Solid Phase and in Solution"@en . "6"^^ . . "P(GA203/07/0469), Z(MSM0021627501)" . "RIV/00216275:25310/07:00005758" . . . . "31" . "Bertolasi, Valerio" . "Structure of Azo Coupling Products from N-Alkylenaminones Derived from Acetylacetone and Benzoylacetone in Solid Phase and in Solution"@en . . "Struktura azokopulovan\u00FDch N-alkyl enaminon\u016F odvozen\u00FDch od acetylacetonu a benzoylacetonu v pevn\u00E9 f\u00E1zi a v roztoku"@cs . "RIV/00216275:25310/07:00005758!RIV08-MSM-25310___" . . "10"^^ . . "Reakc\u00ED substituovan\u00FDch benzendiazonium-tetrafluorobor\u00E1t\u016F s N-alkyl 4-aminopent-3-en-2-ony resp. 3-amino-1-fenylbut-2-en-1-ony byla p\u0159ipravena \u0159ada produkt\u016F azokopulace. Struktura a tautomerie reak\u010Dn\u00EDch produkt\u016F byla studov\u00E1na pomoc\u00ED single crystal X-ray study a pomoc\u00ED NMR spektroskopie v roztoku deuteriochloroformu. Produkty azokopulace na 4-methylaminopent-3-en-2-ony (3a?i) existuj\u00ED v roztoku CDCl3 jako sm\u011Bs E/Z izomer\u016F, kde izomer Z siln\u011B p\u0159eva\u017Euje. Majoritn\u00ED izomer je sm\u011Bs\u00ED enamino-azo a imino-hydrazo tautomer\u016F, kde prvn\u011B jmenovan\u00FD p\u0159eva\u017Euje. Obsah azoformy z\u00E1vis\u00ED na substituci benzenov\u00E9ho j\u00E1dra diazoniov\u00E9 soli a kles\u00E1 v po\u0159ad\u00ED OMe > Me > Br > NO2. P\u0159echod od 4-methylaminopent-3-en-2-on\u016F k 3-methylamino-1-phenylbut-2-en-1-on\u016Fm nem\u00E1 na polohu tautomern\u00ED rovnov\u00E1hy prakticky \u017E\u00E1dn\u00FD vliv. V pevn\u00E9 f\u00E1zi v\u017Edy p\u0159eva\u017Euje azoforma, substituenty na diazoniov\u00E9 soli a na dus\u00EDku N3 nemaj\u00ED na polohu tautomern\u00ED rovnov\u00E1hy v\u00FDznamn\u00FD vliv. Produkty azokopulace v\u017Edy existuj\u00ED ve form\u011B jedin\u00E9ho izomeru Z. V\u0161echny"@cs . "Ly\u010Dka, Anton\u00EDn" . "452910" . "429-438" . . "\u0160im\u016Fnek, Petr" . . . "Structure of Azo Coupling Products from N-Alkylenaminones Derived from Acetylacetone and Benzoylacetone in Solid Phase and in Solution" . . . "Svobodov\u00E1, Mark\u00E9ta" . "25310" . "[D0812D3A7DD1]" . .