نتایج جستجو برای: fluorides
تعداد نتایج: 2278 فیلتر نتایج به سال:
The development of an enantioselective palladium-catalyzed 1,1-fluoroarylation of unactivated aminoalkenes is described. The reaction uses arylboronic acids as the arene source and Selectfluor as the fluorine source to generate benzylic fluorides in good yields with excellent enantioselectivities. This transformation, likely proceeding through an oxidative Heck mechanism, affords 1,1-difunction...
CsF dissolves in fluoride based MSR fuel, which significantly decreases its volatility. CsI has very low solubility the fuel. Exchange between iodides and fluorides occurs stabilizing Cs cations fuel mixture.
Herein we report the deoxygenated fluorination of readily available carboxylic acids. A series acyl fluorides have been synthesized using shelf-stable N -trifluoromethylthiophthalimide as a fluorinated reagent for first time.
In this work, we analyze in detail the relation between electronic structure and fluorine nuclear magnetic resonance (NMR) shielding in a series of solid state alkali fluorides (LiF, NaF, KF, RbF, and CsF). For that purpose, we use solid-state NMR calculations implemented in the density functional theory full potential WIEN2K code (APW+ lo). Both measurements and calculations show that the NMR ...
Decisions concerning use of fluoride in its many forms for caries prevention are more complicated now than in the past because of the need to balance these benefits with the risks of dental fluorosis. This article reviews pertinent literature concerning dental fluorosis (definition, appearance, prevalence), pre- and post-eruptive use of fluoride, esthetic perceptions of dental fluorosis, fluori...
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