Search results
Results from the WOW.Com Content Network
Roholm conducted laboratory studies, interviewed cryolite workers, visited factories, and documented the progression of fluorine poisoning in humans and animals from gastrointestinal upsets, neurological disorders, and bleeding gums to the advanced cases of skeletal fluorosis and crippling arthritis.
Fluorine piping is generally made of nickel or Monel (nickel-copper alloy). [37] Care must be taken to passivate all surfaces frequently and to exclude any water or greases. In the laboratory, fluorine gas can be used in glass tubing provided the pressure is low and moisture is excluded, [ 37 ] although some sources recommend systems made of ...
Perfluoroalkanes are very stable because of the strength of the carbon–fluorine bond, one of the strongest in organic chemistry. [4] Its strength is a result of the electronegativity of fluorine imparting partial ionic character through partial charges on the carbon and fluorine atoms, which shorten and strengthen the bond (compared to carbon-hydrogen bonds) through favorable covalent ...
In reductive hydrodefluorination the fluorocarbon is reduced in a series of single electron transfer steps through the radical anion, the radical and the anion with ultimate loss of a fluorine anion. An example is the conversion of pentafluorobenzoic acid to 3,4,5-tetrafluorobenzoic acid in a reaction of zinc dust in aqueous ammonia.
Fluorographene (or perfluorographane, graphene fluoride) is a fluorocarbon derivative of graphene. [1] [2] [3] It is a two dimensional carbon sheet of sp 3 hybridized carbons, with each carbon atom bound to one fluorine.
A review published in October 2024 by the Cochrane Database of Systematic Reviews raised questions about the value of fluoridation of public drinking water in wealthy countries based on the ...
Perfluorodecalin has been demonstrated as a blood substitute transporting oxygen to the lungs. Fluorine-substituted ethers are volatile anesthetics, including the commercial products methoxyflurane, enflurane, isoflurane, sevoflurane and desflurane. Fluorocarbon anesthetics reduce the hazard of flammability with diethyl ether and cyclopropane.
Electrophilic fluorinating reagents could in principle operate by electron transfer pathways or an S N 2 attack at fluorine. This distinction has not been decided. [2] By using a charge-spin separated probe, [3] it was possible to show that the electrophilic fluorination of stilbenes with Selectfluor proceeds through an SET/fluorine atom transfer mechanism.