फ्लोरियल इसके अंग्रेजी अर्थ का उदाहरण

The Povarov reaction requires a Lewis acid such as boron trifluoride to activate the imine for an electrophilic addition of the activated alkene.

The early thermal spectrum concepts and many current ones rely on nuclear fuel, perhaps uranium tetrafluoride (UF4) or thorium tetrafluoride (ThF4), dissolved in molten fluoride salt.

Reaction with acids or fluorides such as tetra-n-butylammonium fluoride removes the silyl group when protection is no longer needed.

Boron monofluoride monoxide.

TFA is prepared industrially by the electrofluorination of acetyl chloride or acetic anhydride, followed by hydrolysis of the resulting trifluoroacetyl fluoride:.

A volcanic eruption is effusive when the erupting magma is volatile poor (water, carbon dioxide, sulfur dioxide, hydrogen chloride, and hydrogen fluoride), which suppresses fragmentation, creating an oozing magma which spills out of the volcanic vent and out into the surrounding area.

To date, the reaction has been shown to proceed with a variety of other agents including phosphorus pentachloride, phosphorus pentoxide, phosphoryl chloride, thionyl chloride, phosphoric acid-acetic anhydride, polyphosphoric acid, and anhydrous hydrogen fluoride among others.

As with all radioactive 18F-labeled radioligands, the 18F must be made initially as the fluoride anion in a cyclotron.

Synthesis of complete [18F]FDG radioactive tracer begins with synthesis of the unattached fluoride radiotracer, since cyclotron bombardment destroys organic molecules of the type usually used for ligands, and in particular, would destroy glucose.

This produces "carrier-free" dissolved [18F]fluoride ([18F]F−) ions in the water.

Anhydrous fluoride salts, which are easier to handle than fluorine gas, can be produced in a cyclotron.

The fluoride anion is nucleophilic but its anhydrous conditions are required to avoid competing reactions involving hydroxide, which is also a good nucleophile.

The use of the cryptand to sequester the potassium ions avoids ion-pairing between free potassium and fluoride ions, rendering the fluoride anion more reactive.