Allylic systems

The preparation of cellulose laurate was investigated through transesterification in 1-allyl-3- methylimidazolium chloride (AmimCl)/dimethyl sulfoxide (DMSO) cosolvent system by using vinyl laurate as an acylation reagent and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as an effective catalyst.

8p vihermione 06-01-2023 4 2   Download

In this work, an ultrasonic-assisted surfactant/ionic liquid aqueous two-phase system (ATPS) extraction method was developed to extract six tetracycline antibiotics from food samples before their chromatographic determination using high performance liquid chromatography. The ATPS was formed with 1-allyl-3-methyl-imidazolium bromide, Triton X-100, and dipotassium hydrogen phosphate. The parameters including type and amount of surfactant, ionic liquid and salt, pH of sample solution, and sonication time were optimized.

12p tudichquannguyet 29-11-2021 11 1   Download

An aqueous two-phase extraction system was constituted using magnetic ionic liquid-nonionic surfactant for phenolic acids and the developed method was applied to apple, grape, pear, and banana samples. Ionic liquids based on imidazolium containing butyl, allyl, and benzyl groups were used for extraction. The parameters influencing the extraction efficiency such as volume of ionic liquids, type and amount of surfactant and salt, ultrasound extraction time, temperature, and sample pH were optimized.

14p tudichquannguyet 29-11-2021 14 1   Download

(nb) the study guide and solutions manual contains detailed solutions to all the problems in the text. learning how to solve a problem is, in our view, more important than merely knowing the correct answer. to that end we have included solutions sufficiently detailed to provide the student with the steps leading to the solution of each problem.

828p alamcaysidau 03-10-2018 44 3   Download

(bq) part 1 book "organic chemistry" has contents: chemical bonding, alkanes, conformations of alkanes and cycloalkanes, alcohols and alkyl halides, structure and preparation of alkenes - elimination reactions, stereochemistry, nucleophilic substitution,... and other contents.

609p bautroibinhyen20 06-03-2017 58 7   Download

(bq) part 1 book "organic chemistry" has contents: structure determines properties, alcohols and alkyl halides, addition reactions of alkenes, stereochemistry, nucleophlic substitution, conlugation in alkadienes and allylic systems, arenes and aromaticity, spectroscopy,... and other contents.

626p bautroibinhyen20 06-03-2017 53 8   Download

(bq) the book brief explanations describing the purpose of each problem and the rationale behind the solutions, helpful notes in the margin highlighting important principles and directing students to further information in the chemical literature.

376p bautroibinhyen20 06-03-2017 50 5   Download

Sodium 2-propenyl thiosulfate, a water-soluble organo-sulfane sulfur com-pound isolated from garlic, induces apoptosis in a number of cancer cells. The molecular mechanism of action of sodium 2-propenyl thiosulfate has not been completely clarified. In this work we investigated, byin vivo and in vitro experiments, the effects of this compound on the expression and activity of rhodanese.

16p galaxyss3 07-03-2013 38 3   Download

This chapter aims to cover theoretical and computational studies on or- ganometallic molecules. Section 2 covers the s-block elements, Section 3 covers the p-block metals and Section 4 covers the d- and f-block metals. Clusters, carbonyls and metal-metal bonded systems containing M-C bonds are included. Cyanide complexes, metal fullerene derivatives, extended systems and organic species on metal surfaces are excluded except where calculations have been performed on model complexes designed to mimic solid state and surface chem- istry....

468p banhkem0908 24-11-2012 66 12   Download