نتایج جستجو برای: isomerisation

تعداد نتایج: 423  

Journal: :European Journal of Organic Chemistry 2022

The Front Cover shows the influence of reaction solvent on purin-2-yl Grignards with carbonyl compounds. In ether (THF), gives 8-carbinol products due to a rapid isomerisation purin-8-yl, whereas performing in dichloromethane stops and yields 2-carbinols good yields. contrast aldehydes, reactions ketones require prior complexation LaCl3.2LiCl before addition Grignard reagent. More information c...

Journal: :Dalton transactions 2014
G Bauer M Nieger D Gudat

Group-13 metal acetylacetonates [M(acac)3] (M = Al, Ga, In) or Al(OiPr)3 react with a complex [Pd(catphosH)2] that may act as chelating ligand towards a second metal, or with a mixture of catechol phosphine (catphosH2) and [PdCl2(cod)], to give heterometallic complexes featuring either dinuclear M(catphos)2Pd or trinuclear M{(catphos)2Pd}2 motifs. Characterisation of the products by crystallogr...

Journal: :Dalton transactions 2012
Paul V Bernhardt Manuel Martínez Carlos Rodríguez Marta Vazquez

The Fe(III) abstraction from Fe(III)/DFO and Fe(III)/EDTA complex systems by thiosemicarbazone ligands derived from 2-acetylpyridine has been studied from a kinetico-mechanistic perspective at relevant pH conditions and at varying temperatures and buffer solutions. The reactions have been found to be extremely dependent on the dominant E/Z isomeric form of the TSC ligands present in the reactio...

2014

The degradation and/or isomerisation of lycopene have an important influence on its bioavailability and bioactivities. Existing studies have shown that the configuration profiles and stability of lycopene will be changed because of heat processing, but the relationship between the structure conversion of lycopene and the intensity of heat treatment is yet to be further studied. To simplify the ...

2011
R. Lloyd T. W. Hansen W. Ranke F. C. Jentoft R. Schlögl

Nanocrystalline thin films of the alkane skeletal isomerisation catalyst sulfated zirconia were successfully deposited on a silicon substrate in order to allow the application of surface science techniques. Thermal treatment of the films was optimised to chemically mimic the powder preparation process, resulting in films possessing the essential features (including tetragonal phase, nanocrystal...

2013

The degradation and/or isomerisation of lycopene have an important influence on its bioavailability and bioactivities. Existing studies have shown that the configuration profiles and stability of lycopene will be changed because of heat processing, but the relationship between the structure conversion of lycopene and the intensity of heat treatment is yet to be further studied. To simplify the ...

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