Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Phosphorus chlorofluorides

Figure 9.13 The geometry of some phosphorus chlorofluorides and some phosphorus methyl fluorides in which the larger and less electronegative ligands occupy the equatorial sites. Figure 9.13 The geometry of some phosphorus chlorofluorides and some phosphorus methyl fluorides in which the larger and less electronegative ligands occupy the equatorial sites.
As previously stated (p. 53) di-(2-chloroethyl) phosphoro-fluoridate can be prepared by the action of phosphorus oxydi-chlorofluoride on ethylene chlorohydrin. The compound can also be prepared by the fluorination of di (2-chloroethyl) phos-phorochloridate, prepared from di-(2-chloroethyl) hydrogen phosphite (XVIII), obtained by the action of phosphorus trichloride on ethylene chlorohydrin. This partial fluorination was effected by means of sodium fluoride, although the yield was not high. The chlorine atoms of the 2-chloroethyl groups were not affected by this procedure, a fact which falls into line with the observations of Saunders and Stacey (p. 12) that ethylene chlorohydrin is not readily fluorinated by sodium fluoride, but only by potassium fluoride under pressure in a rotating autoclave.1... [Pg.94]

Calcium fluoride has also been used in metathetical reactions. Usually, heat is required to promote reactions of this type. Booth and Dutton4 passed vapors of a volatile halide [phosphorus(V) oxychloride] over a bed of heated calcium fluoride to produce the chlorofluoride and fluoride derivatives. Sodium fluoride, potassium fluoride, titanium (IV) fluoride, and zinc fluoride have been used in similar metathetical fluorination reactions. [Pg.137]

Hoffman, F. and Reeves, A. 1961. Organic phosphorus compounds, VII. The preparation of methylphosphonic chlorofluoride. Journal of Organic Chemistry, 26 3040-3041. [Pg.45]

Carbon suboxide, 52 Carbonylation, 148, 149, 216 Carbonyl chlorofluoride, 48, 54 Carbonyl cyanide, 60-61 N,N -Carbonyldiimidazole, 61 1,1-Carbonyldi-l,2,4-triazole, 61 N-Carbonylsulfamic acid chloride (N-Carbonylsulfamyl chloride), 61 Carboxamides, 270 Carboxamine-N-sulfochlorides, 70 p-Carboxybenzenediazonium chloride, 62 p-Carboxybenzenesulfonazide, 62 Carboxylation, 15, 16 Carboxylic acid anhydrides, 133 Carboxylic acid N,N-dimethylamines, 153 Carboxylic anhydrides, 409-410 p-Carboxyphenylhydrazones, 62 Cardenolides, 130, 131 (S-Carotene, 19 /-Carvone, 451, 452 i//-Caryophyllene, 149, 150 Catechol, 65, 233 Catechol amines, 159 Catechyl phosphorus tribromide, 63 Catechyl phosphorus trichloride, 63 Cis-Cecropia juvenile hormone, 261 Cedrene, 234, 235 a-Cedrene, 349 /3-Cedrene, 349 Cendranoxide, 234, 235 Cephalosporin C, 48 Ceric ammonium nitrate, 63-65 Ceric sulfate. 65 Cesium fluoride, 346 trans-Chalcone oxide, 422 Chalcone phenylhydrazones, 257, 258 Chalcones, 406 Chloramine, 65-66, 69 Chloranil, 66-67, 113, 116, 401,454... [Pg.261]

An sp d hybrid orbital set may be considered to be a combination of p d hybrids and spj>y hybrids. The former make two linear hybrid orbitals bonding axially and the latter form the trigonal, equatorial bonds. The sp2 hybrid orbitals are capable of forming stronger bonds, and they are shorter than the weaker axial bonds. When the electronegativities of the substituents on the phosphorus atom differ, as in the mixed chlorofluorides, and the alkylphosphorus fluorides, R,PFs r it is experi-... [Pg.227]

Sarin can be made by more than one method, but in the usual large scale route chloromethane, phosphorus trichloride and aluminium chloride, and then water react to give methylphosphonic dichloride this, on treatment with hydrogen fluoride (or sodium fluoride), gives a mixed chlorofluoride, which, by reaction with isopropyl alcohol, pelds Sarin (Figure 3). [Pg.211]

Although the nature of bonding in pentacoordinated molecules at present is little understood, certain gross structural features recently have revealed themselves in the phosphorus(V)chlorofluorides, Results of studies involving nuclear quadrupole resonance spectroscopy (1), dipole moment measurements (1), IR- and Raman spectroscopy (2), NMR(3), and calorimetric measurements of complex formation (4) coupled with related information on the series POClj F3.j and PClxF3 x have provided the necessary information to allow an initial correlative interpretation concerning stereochemical aspects and the nature of the nonequivalence of bonds in these molecules. [Pg.116]

The phosphorus(V)chlorofluorides are especially interesting because they exist in molecular forms which slowly rearrange at room temperature to solid modifications. The molecular forms are trigonal bipyramids and have the following symmetries (1-3) PCI4F, PCI3F2. 2 3 2v ... [Pg.116]


See other pages where Phosphorus chlorofluorides is mentioned: [Pg.19]    [Pg.19]    [Pg.499]    [Pg.246]    [Pg.662]    [Pg.253]    [Pg.256]    [Pg.649]    [Pg.253]    [Pg.256]    [Pg.499]    [Pg.246]    [Pg.227]    [Pg.117]    [Pg.227]   
See also in sourсe #XX -- [ Pg.8 , Pg.9 ]




SEARCH



1.1- Chlorofluorides

Chlorofluoride

© 2024 chempedia.info