1,721,141 research outputs found
Vanadium catalyzed oxidation with hydrogen peroxide
Full text linkVanadium peroxides are known as very effective oxidants af different organic and inorganic substrates. In this short account reactivity, structural and mechanistic studies concerning the behaviour of peroxovanadates toward a number of different substrates are collected. Homogeneous and two-phases systems are presented, in addition, interesting synthetic results obtained with the use of ionic liquids as reaction media are also presented
Ferrocene in agriculture: from agrochemicals and soil remediation to selective chemosensors
No full textFerrocene and derivatives find numerous application in agriculture, both as agrochemicals and as catalysts for selective synthesis of agrochemicals. Moreover, they can be used as surfactants in soil remediation and as selective colorimetric and electrochemical chemosensors for analytes of interest in agriculture
Su alcuni aspetti del biochimismo ruminale e del flusso dei digesta negli Ovini e Caprini.
No full textEffetti dell’integrazione alimentare con sanse d’olive sulla composizione in acidi grassi del latte bovino
No full textLa carta geomorfologica della Pianura Padana e la sua applicazione alla Carta della Vulnerabilità Regionale degli Acquiferi: criteri tecnici e metodologici.
No full textSTUDIO DI RITMI RIPRODUTTIVI ADATTATI ALLA FISIOLOGIA DELLA CONIGLIA FATTRICE. 1. IL PROFILO EMATICO DI NEFA COME INDICATORE DELLA CONDIZIONE CORPOREA E RELAZIONE CON L'EFFICIENZA RIPRODUTTIVA
No full textThe addition of 2,4-dinitrobenzenesulfenyl chloride to some alkyl-substituted vinylferrocenes
No full textThe addition of 2,4-dinitrobenzenesulfenyl chloride to alkyl-substituted vinylferrocenes has been investigated in CH2Cl2, 1,1,2,2-tetrachloroethane and acetic acid solutions. Product analyses were carried out by VPC and PMR techniques and reaction rates measured by a spectrophotometric method. The orientation appears to be determined by the structural features of the intermediate episulfonium ion rather than by the site of the primary attack of the electrophile on the starting substrate. A comparison with the results previously obtained with the methoxymercuration reaction has a bearing on the mechanism of the latter reactio
Reaction of ethynylferrocene with arenesulphenyl chlorides
No full textThe reaction of ethynylferrocene with arenesulphenyl chlorides [ArSCl; Ar = Ph, p-ClC6H4, p-MeC6H4, p-MeOC 6H4, p-NO2C6H4, or 2,4-(NO2)2C6H3] follows an unusual pathway; the main outcome is substitution of the acetylenic proton, rather than electrophilic addition to the triple bond. The following compounds were isolated and identified: FcC≡CSAr, FcCCl=CHSAr, and FcCCl=CH2 or FcCOCH3 (Fc = ferrocenyl), depending on the reaction conditions. A mechanistic scheme is proposed
Chimica consapevole, responsabile, sostenibile: la sfida entra nella scuola
Full text linkConscious, Responsible, Sustainable Chemistry. The Challenge Goes to School
Green chemistry is more and more diffuse in academics, its principles are gaining favor and followers among scientists, aware of the huge problems related
to environment depletion and not renewable energetic sources. It is time that green chemistry principles enter the school and thereby the society. After a brief
presentation and explanation of green chemistry principles, a number of successful practical applications is reported
- …
