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Ultraviolet resonance Raman spectroscopy analysis of carbonyl groups present after different bleaching stages for various bleach sequences
(2019-02-01)
Different bleaching reagents have different efficiencies of removing chromophore groups from chemical pulps. The objective of this work was to evaluate the effect of different bleaching sequences on the removal of chromophore ...
Spectroscopic studies of heterobimetallic carbonyls cis-[Fe(CO)(4)(HgX)(2)], X = Cl, Br, I.
(Soc Brasileira Quimica, 1999-11-01)
cis-[Fe(CO)(4)(HgX)(2)], X=Cl, Br, I, The series of compounds cis-[Fe(CO)(4)(HgX)(2)], X=Cl, Br, I shows an octahedral geometry around the iron atom with the two HgX groups cis to each other, In this paper the assignment ...
Predicting the reaction mechanism of nucleophilic substitutions at carbonyl and thiocarbonyl centres of esters and thioesters
(2012)
In nucleophilic substitution reactions at carbonyl centres, there are two possible channels. The first one occurs when the attack of nucleophilic agents takes place simultaneously with the departure of the nucleofuge. This ...
Predicting the reaction mechanism of nucleophilic substitutions at carbonyl and thiocarbonyl centres of esters and thioesters
(John Wiley & Sons, 2012)
In nucleophilic substitution reactions at carbonyl centres, there are two possible channels. The first one occurs when the attack of nucleophilic agents takes place simultaneously with the departure of the nucleofuge. This ...
Small angle X-ray scattering and IR spectroscopy study of metal carbonyl complexes immobilized on a silica gel surface chemically modified with piperazine
(Elsevier B.V., 1996-01-01)
The carbonyl complexes [WCl(CO)(3)(bipy) (HgCl)] (1), [Fe(CO)(4)(HgCl)(2)] (2) and W(CO)(6)] (3) were immobilized on a silica gel surface organofunctionalized with piperazine groups. The products obtained were studied by ...
Small angle X-ray scattering and IR spectroscopy study of metal carbonyl complexes immobilized on a silica gel surface chemically modified with piperazine
(Elsevier B.V., 1996-01-01)
The carbonyl complexes [WCl(CO)(3)(bipy) (HgCl)] (1), [Fe(CO)(4)(HgCl)(2)] (2) and W(CO)(6)] (3) were immobilized on a silica gel surface organofunctionalized with piperazine groups. The products obtained were studied by ...
Photoremoval of Protecting Groups: Mechanistic Aspects of 1,3- Dithiane Conversion to a Carbonyl Group
(American Chemical Society, 2015-02)
Photodeprotection of 1,3-dithianes in the presence of thiapyrylium was performed to return to the parent carbonyl compound, and the mechanism was studied by steady state photolysis, laser flash photolysis, and theoretical ...
Low cost selective sensor for carbonyl compounds in air based on a novel conductive poly(p-xylylene) derivative
(ELSEVIER SCIENCE BV, 2009)
A novel poly(p-xylylene), PPX, derivative bearing phenyl side groups was electrochemically synthesized in 85% yield. The polymer, poly(2-phenyl-p-xylylene) (PPPX), presented a major fraction (88%) soluble in common organic ...
The effect of carbonyl group in the asymmetry of3,4J CH coupling constants in norbornanones
(John Wiley & Sons Ltd, 2008-02)
A rationalization of the known difference between the 3,4J C4H1 and 3,4JC1H4 couplings transmitted mainly through the 7-bridge in norbomanone is presented in terms of the effects of hyperconjugative interactions involving ...
Lipid damage is the best marker of oxidative injury during the cardiac remodeling process induced by tobacco smoke
(2018-11-16)
BACKGROUND: Oxidative stress is one potential mechanism that explain the direct effects of smoking on cardiac remodeling process. However, no study has compared different myocardial products of macromolecule oxidation after ...