Phosphorus trifluoride reactions with

Reaction with phosphorus trichloride yields phosphorus trifluoride and with phosphoryl fluoride and sulfur trioxide, the product is phosphorus penta-fluoride ... 

As expected, the compound is highly reactive and readily decomposes. Phosphorus trifluoride reacts with iVN -dimethylethylenediamine to give (58), and a borine adduct is formed by attachment to the phosphorus atom. In the 1 1 boron trifluoride adduct, however, the donor site is nitrogen, but n.m.r. spectroscopy shows the presence of two isomeric forms due to different orientations of the P— F bond. Further BF3 addition leads to reversible formation of (59). Reactions of cyclic and acyclic phosphoramidites... 

A comprehensive review of the preparation, reactions, and n.m.r. spectra of phosphorus-fluorine compounds has appeared. This year s literature has been notable for the first detailed applications of ab initio SCF-MO calculations to the problems of bonding in halogenophosphines and their derivatives. - Comparison of the results of such theoretical calculations with experimental data obtained from photoelectron spectra shows a good correlation in the case of phosphorus trichloride and phosphoryl chloride, and of phosphorus trifluoride and its borane complex. ... 

Knowing all these facts, especially the difficult access to fluorophosphines and the poor donating abilities of phosphorus trifluoride (5, 6), we decided to use another approach, which readily led to a number of coordination compounds with fluorophosphine ligands—namely, the fluorination of chlorophosphines already coordinated to the transition metal, where the 3s electrons of phosphorus are blocked by the complex formation. There was no reaction between elemental nickel and phosphorus trifluoride, even under extreme conditions, whereas the exchange of carbon monoxide in nickel carbonyl upon interaction with phosphorus trifluoride proceeded very slowly and even after 100 hours interaction did not lead to a well defined product (5,6). 

Not yet obtained in satisfactory purity prepared by metathetical reaction from (PCls)s-Mo(CO)a (2) with potassium fluorosulfinate. In addition to carbonyl absorptions, infrared spectrum exhibits only strong P—F stretching absorptions at 852 cm. -1 (m), 867 cm,-1 (vs), and 880 cm. (sh), in the region for phosphorus trifluoride (10),... 

Thenaldehyde (thiophene-2-carbaldehyde) is readily available via the Vilsmeier-Haack reaction of DMF with thiophene catalyzed by phosphorus oxychloride. The Sommelet reaction with 2-chloromethylthiophene also gives reasonable yields (63AHC(l)l). Likewise, thiophene is readily acylated with acyl anhydrides or acid chlorides (equation 14), using mild Friedel-Crafts catalysts, such as tin(IV) chloride, zinc chloride, boron trifluoride, titanium tetrachloride, mercury(II) chloride, iodine and even silica-alumina gels or low-calcium-content montmorillonite clays (52HC(3)l). 

Similarly, the reaction of phosphorus trifluoride and iron pentacarbonyl 59) at elevated temperatures and pressures results in a mixture of compounds of the general formula Fe(CO)5 B(PF3)B, where n=0-5. All of these compounds were isolated from the reaction mixture by gas chromatography. However, it is stated that equilibrium was most probably not reached and thus no efforts were made to calculate equilibrium constants. Similar studies have been mentioned to be in progress with molybdenum carbonyls (5). 

The redistribution reaction in lead compounds is straightforward and there are no appreciable side reactions. It is normally carried out commercially in the liquid phase at substantially room temperature. However, a catalyst is required to effect the reaction with lead compounds. A number of catalysts have been patented, but the exact procedure as practiced commercially has never been revealed. Among the effective catalysts are activated alumina and other activated metal oxides, triethyllead chloride, triethyllead iodide, phosphorus trichloride, arsenic trichloride, bismuth trichloride, iron(III)chloride, zirconium(IV)-chloride, tin(IV)chloride, zinc chloride, zinc fluoride, mercury(II)chloride, boron trifluoride, aluminum chloride, aluminum bromide, dimethyl-aluminum chloride, and platinum(IV)chloride 43,70-72,79,80,97,117, 131,31s) A separate catalyst compound is not required for the exchange between R.jPb and R3PbX compounds however, this type of uncatalyzed exchange is rather slow. Again, the products are practically a random mixture. 

Phosphorus Trifluoride, PF3.—Some early indications were obtained that phosphorus reacted with fluorides of zinc and lead,1,2 and that the fluoride resulting was a gas.3 This gas was prepared in 1884 by heating lead fluoride with copper phosphide in a brass tube.4 It is also produced by the action of fluorides of zinc, silver or lead on phosphorus trichloride or tribromide.5 One of the most convenient methods of preparation is by the reaction between arsenic trifluoride, which is easily prepared and purified, and phosphorus trichloride, thus —... 

The reaction between molybdenum hexacarbonyl and elemental fluorine at —65° results in the formation of Mo2F9, which upon thermal degradation produces molybdenum pentafluoride as one of the products.1 Other syntheses of molybdenum pentafluoride include the reduction of molybdenum hexafluoride with phosphorus trifluoride,2 tungsten hexacarbonyl, or molybdenum metal at high temperatures3 and the oxidation of powdered molybdenum metal with elemental fluorine at 900°.3 The present method consists in the reaction of molybdenum hexafluoride with powdered molybdenum metal at 60° and results in the formation of pure molybdenum pentafluoride in yields of 80% and greater. 

SAFETY PROFILE Inhalation of the fumes can produce a febrile reaction and leucocytosis in humans. Questionable carcinogen with experimental tumorigenic data. Violent reaction or ignition in contact with interhalogens (e.g., bromine pentafluoride, chlorine trifluoride). Incandescent reaction with phosphorus pentachloride. See also MAGNESIUM COMPOUNDS. 

Isoflavones (3-aryl-chromones) can also be prepared in this way boron trifluoride-catalysed Friedel-Crafts acylation of a reactive phenol with an aryl acetic acid is followed by reaction with dimethylfor-mamide and phosphorus pentachloride. ... 

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