نتایج جستجو برای: alkylbenzenes
تعداد نتایج: 220 فیلتر نتایج به سال:
A low-conversion poly(butyl methacrylate-co-ethylene dimethacrylate)-based polymer monolithic column was prepared by ultraviolet (UV) irradiation for a short time at a low temperature (-15°C). By UV irradiation for 2 min, the monolithic column exhibited a high permeability of 5.6 × 10(-13) m(2) and a high column efficiency of over 100000 plates m(-1). At this polymerization time, the conversi...
Among the Basidiomycetes the species of the genus Coprinus have black spores and hymenia that, at maturity, are transformed through autodigestion into a black or inky fluid that drops from the pileus and blackens the soil beneath the fruiting structures. The melanins from three different species of Coprinus have been characterized by spectroscopic techniques, including cross-polarization, magic...
Abstract Strategies that enable intermolecular site-selective C–H bond functionalisation of organic molecules provide one the cornerstones modern chemical synthesis. In chloroalkane synthesis, such methods for aliphatic chlorination have, however, remained conspicuously rare. Here, we present a copper(I)-catalysed synthetic method efficient C( sp 3 )–H ketones, ( E )-enones and alkylbenzenes by...
The ortho-benzyne diradical, o-C(6)H(4) has been produced with a supersonic nozzle and its subsequent thermal decomposition has been studied. As the temperature of the nozzle is increased, the benzyne molecule fragments: o-C(6)H(4)+Delta--> products. The thermal dissociation products were identified by three experimental methods: (i) time-of-flight photoionization mass spectrometry, (ii) matrix...
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