Structure of Disilylated Acetoacetohydroxamic Acid

0104843 - UCHP-M 20040097 RIV CZ eng J - Journal Article
Schraml, Jan - Hetflejš, Jiří - Šabata, Stanislav - Blechta, Vratislav - Sýkora, Jan - Roithová, Jana
Structure of Disilylated Acetoacetohydroxamic Acid.
[Struktura disilylované acetoacetohydroxamové kyseliny.]
Collection of Czechoslovak Chemical Communications. Roč. 69, č. 7 (2004), s. 1472-1478. ISSN 0010-0765
R&D Projects: GA AV ČR IAA4072005
Institutional research plan: CEZ:AV0Z4072921
Keywords : hydroxamic acid * ketenes * hydroxylamines
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 1.062, year: 2004

As proved by 29Si and 15N NMR spectra, the reaction of N,O-bis(trimethylsilyl)hydroxyl-amine with diketene yields a mixture of E and Z isomers of O,Ó-bis(trimethylsilyl)aceto-acetohydroximic acid ((E)-3 and (Z)-3), and not the conformers of N,O-bis(trimethyl-silyl)acetoacetohydroxamic acid, as believed up to now. In contrast, the acetylation of N,O-dimethylhydroxylamine leads to methyl N-methylacetohydroxamate, analogous to the structure

Bylo spektroskopicky prokázáno, že titulní sloučenina ma strukturu hydroximovou a nikoliv hydroxamovou jak se dosud věřilo. Naproti tomu acetylace vede k analogické struktuře methylacetohydroxamatu
Permanent Link: http://hdl.handle.net/11104/0012105