نتایج جستجو برای: t but ammonium iodide
تعداد نتایج: 2640063 فیلتر نتایج به سال:
Dibenzoylperoxide emerged as a versatile oxidant for quaternary ammonium iodide or bromide-catalyzed reactions of phenol derivatives with NaN3. While the use iodides allowed efficient benzylic azidations under these oxidative conditions, bromides dearomative instead. Both approaches have been successfully applied to different and first proof-of-concept an enantioselective variant using chiral q...
A four-component synthesis of 2-phenyl-9H-pyrimido[4,5-b]indoles was developed using indole-3-carboxaldehydes, aromatic aldehyde and ammonium iodide as the raw materials under transition-metal-free conditions. The pyrimidine ring formed in one pot through [4 + 2] annulation reaction. Four C–N bonds were promoted by iodine additives. This work is highlighted two iodides sole nitrogen source.
to study the effect of type and different nitrogen fertilizers on controlling egyptian broomrape, field and greenhouse studies based on randomized complete block with three replications, were conducted at ferdowsi university of mashhad. greenhouse study treatments were consisted of ammonium nitrate, ammonium sulfate and urea each of which applied at four rates (75, 150, 300 and 350 kg/ha). fiel...
reduction of methoxyketon 1 by nabh4 gives methoxyketol 2. allthough acetate and tosylate of this alchohol were not seprated, benzoate ester was isolated. reduction of ketol 2 by lialh4 gives alchohol 4. ketol 9 does not react with methyl magnesium iodide, but methoxyketon 1 react with both methyl magnesium iodide and phenyl magnesium iodide gives corresponding hydrocarbons. keton 13 with pheny...
Using the ab initio-based training database, we trained potential function for ammonium iodide (NH4I) based on a deep neural network-based model. On basis of this function, simulated temperature-driven β ⇒ α-phase transition NH4I with isobaric isothermal ensemble via molecular dynamics simulations, results which are in good agreement recent experimental results. As it increases near phase tempe...
Perchlorate is a known environmental contaminant, largely due to widespread military use as a propellant. Perchlorate acts pharmacologically as a competitive inhibitor of thyroidal iodide uptake in mammals, but the impacts of perchlorate contamination in aquatic ecosystems and, in particular, the effects on fish are unclear. Our studies aimed to investigate the effects of concentrations of ammo...
An asymmetric moissanite anvil cell is used to study aqueous solutions of ammonium iodide at pressures up to 10 kbar. The index of refraction is measured using the rotating Fabry-Perot technique, with an accuracy of approximately 1%. The mass density and molar volume of the solutions are estimated using the measured index values, and the molar volume is used to predict the pressure dependence o...
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