Buscar
Mostrando ítems 21-30 de 197
Trifluoroselenoacetic acid, CF3C(O)SeH: Preparation and properties
(American Chemical Society, 2010-09-29)
The hitherto unknown trifluoroselenoacetic acid was prepared through the reaction of trifluoroacetic acid with Woollins' reagent. The compound was fully characterized by mass spectrometry, 1H, 19F, 77Se, and 13C NMR, ...
Matrix-isolation FTIR, theoretical structural analysis and reactivity of amino-saccharins: N-(1,1-dioxo-1,2-benzisothiazol-3-yl)-N-methyl amine and -N,N-dimethyl amine
(Elsevier Science, 2009-12)
In this work, two novel amino-substituted derivatives of saccharin, N-(1,1-dioxo-1,2-benzisothiazol-3- yl)-N-methyl amine (MBAD) and N-(1,1-dioxo-1,2-benzisothiazol-3-yl)-N,N-dimethyl amine (DMBAD), were synthesized and ...
Preparation and properties of two novel selenoacetic acids: HCF 2C(O)SeH and ClCF 2C(O)SeH
(American Chemical Society, 2012-02-03)
The novel selenocarboxylic Se-acids, HCF 2C(O)SeH and ClCF 2C(O)SeH, were prepared by treating the corresponding carboxylic acids with Woollins' reagent. The boiling points were extrapolated from the vapor pressure curves ...
The Structure and Conformation of (CH3)3CSNO
(Wiley VCH Verlag, 2015-07)
The gas-phase molecular structure of (CH3)3CSNO was investigated by using electron diffraction, allowing the first experimental geometrical parameters for an S-nitrosothiol species to be elucidated. Depending on the ...
Silver colloidal nanoparticles: Effect on matrix composition and structure of Candida albicans and Candida glabrata biofilms
(2013-04-01)
Aim: The aim of this study was to assess the effect of different silver nanoparticles (SN) concentrations on the matrix composition and structure of Candida albicans and Candida glabrata biofilms. Methods and Results: ...
Source of slow lithium atoms from Ne or H-2 matrix isolation sublimation
(AMER INST PHYSICSMELVILLE, 2012-04)
We have studied, via laser absorption spectroscopy, the velocity distribution of Li-7 atoms released from cryogenic matrices of solid neon or molecular hydrogen. The Li atoms are implanted into the Ne or H-2 matrices - ...
Methyl 3-methyl-2H-azirine-2-carboxylate photochemistry studied by matrix-isolation FTIR and DFT calculations
(American Chemical Society, 2006-08)
The aliphatic 2H-azirine, methyl 3-methyl-2H-azirine-2-carboxylate (MMAC), has been synthesized and its monomeric form investigated by IR spectroscopy in an argon matrix, at 10 K, as well as theoretically (DFT/B3LYP/6-31 ...
Substituent effects on the photolysis of methyl 2-carboxylate substituted aliphatic 2H-azirines
(Elsevier Science, 2007-05)
In this study, the UV induced photochemical reactions of two 2H-azirines – methyl 2-chloro-3-methyl-2H-azirine-2-carboxylate (MCMAC) and methyl 3-methyl-2H-azirine-2-carboxylate (MMAC) – isolated in argon matrices are ...
Photochemistry of 1-phenyl-tetrazolone isolated in solid argon
(Elsevier Science Sa, 2006-12)
The molecular structure, vibrational spectra, tautomerism and photochemistry of the derivative of tetrazole, 1-phenyl-tetrazolone (C7H6N4O;PT) have been studied by FT-IR matrix isolation spectroscopy and DFT/B3LYP/6-311++G(d,p) ...
Amino→Imino Tautomerization upon in Vacuo Sublimation of 2-Methyltetrazole Saccharinate as probed by Matrix Isolation Infrared Spectroscopy
(American Chemical Society, 2013-03)
The amino−imino tautomerization of the nitrogen-linked conjugate 2-methyltetrazole-saccharinate (2MTS) was observed upon sublimation of the compound in vacuo. As shown previously by X-ray diffraction [Ismael, A.; Paixao, ...