XXXV.—Some reactions and new compounds of fluorine

detection of volatile compounds of medicinal plants with some nano-sorbents using modified or new methodologies and investigation of antioxidant activity of their methanolic extracts

in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...

Thermochemistry of Organic Fluorine Compounds and Carbon Compounds

Rotating-bomb calorimetry was first applied to organic compounds that contain chlorine, bromine, or sulphur. Techniques developed for these classes of compounds, mostly at the University of Lund and at the Bureau of Mines in Bartlesville, have been described in the book Experimental Thermochemistry-, The development of rotating-bomb methods made accurate combustion calorimetry feasible for othe...

[Health effects of fluorine and its compounds].

Fluoride, the ionic form of fluorine, is a natural component of the biosphere and 13th most abundant element in the crust of the earth. It is, therefore, found in a wide range of concentrations in virtually all inanimate and living things. Many trace elements perform a definite function in human metabolism and the question of the value of fluoride, always found in the body, has been raised. Muc...

Organoboron compounds in new synthetic reactions

A general and convenient method for the stereoand regiospecific synthesis of conjugated alkadienes, alkenynes, arylated alkenes, and other olefinic compounds is described. The reaction of (E)or (Z)-lalkenyldisiamylboranes, or 2-(E)-l-alkenyl-l ,3,2-benzodioxaboroles easily obtainable by hydroboration, with either (E)or (Z)-l-alkenyl halides in the presence of a catalytic amount of tetrakis(trip...

Determination of fluorine in organic compounds.