Tris trifluoromethyl

FLUORME COMPOUNDS,ORGANIC - FLUORINATED AROMATIC COMPOUNDS] (Volll) tris-(Trifluoromethyl)-s-tria2ine [368-66-1]... 

There have been several reports of the formation of tertiary bismuthines by the action of free radicals on metallic bismuth. One method of generating the radicals iavolves cleavage of ethane or hexafluoroethane ia a radiofrequeacy glow discharge apparatus the radicals thus formed are allowed to oxidize the metal at — 196°C (53). Trimethylbismuthiae and tris(trifluoromethyl)bismuthine [5863-80-9], C BiF, have been obtained by this procedure. 

The reaction of tris(trifluoromethyl)bismuthine with chlorine, bromine, or iodine, however, has been found to yield the corresponding bismuth trihahde and trifluoromethyl hahde (61) ... 

Pyrazole, 3,4,5-tris(trifluoromethyl)-synthesis, 5, 282 Pyrazole, vinyl-reactions, 5, 261 Pyrazole, 1-vinyl-polymerization, 1, 279... 

In the presence of potassium fluoride in dimethylformamide, trifluoroacetyl nitrite converts perfluoroisobutylene to tris(trifluoromethyl)nitrosomethane via the carbanion generated by the nucleophilic attack of fluoride ion on perfluoro-isobutylene [5] (equation 5)... 

Hexafluoropropene and sulfur react at 425 °C in the vapor phase to give hexafluorothioacetone and its dimer [/]. In dimethylformamide, it reacts with potassium fluoride and sulfur to give hexafluorothioacetone dimer, which further reacts with hexafluoropropene to give the E and Z isomers of perfluoro-2,4,6-tris(trifluoromethyl)-5-thia-3-heptene [2] (equation 1). 

Another type of sterically demanding benzamidinate ligands contains the 2,4,6-tris(trifluoromethyl)phenyl substituent at the central carbon atom of the... 

Tris(trifluoromethyl)germanium iodide is unstable in 3M base, however, and yields fluoroform quantitatively. All of the compounds showed good thermal stability (15). 

A. Nucleophilic Reactions of the P=0 Group.—Tris(trifluoromethyl)-phosphine oxide (33) reacts with hexamethyldisiloxane to give a phos-phorane, whose n.m.r. spectrum at — 140 °C shows non-equivalent trifluoromethyl groups. Although this unusual reaction clearly involves nucleophilic attack of the phosphoryl oxygen on silicon at some stage of the reaction, a full study of the mechanism has not been published. Tertiary phosphine oxides can be converted cleanly into dichlorophos-phoranes (34) by treatment with two moles of phosphorus pentachloride. Alkylation of the sodium salt of tetraphenylmethylenediphosphine dioxide (35) with alkyl halides, in dimethyl sulphoxide, has been reported to... 

Arylgold(I) compounds can be similarly prepared to alkyl derivatives via the organolithium or the Gridnard route. These methods have been used to prepare pentachlorophenyl,1641 4,4 -octa-fluorobiphenyl (Equation (27)),2109 2,4,6-tris(trifluoromethyl)phenyl,1 2,21 0 triphenylar-... 

Peril uoro-teri-nitrosobutanc (Tris(trifluoromethyl)nitrosomethane)... 

According to the data of Griitzmacher et al., the isomerization of the proposed intermediate betaine 41, which is formed in the reaction of bis[2,4,6-tris(trifluoromethyl)phenyl]stannylene 39 with phosphorus ylide 40, affords stannylene 41 (Scheme 18).76... 

Similarly, the two remaining perdeuterated analogues (CF3) Ge(CD3)4- (n = 2 and 3) form on treating bis(trifluoromethyl)diiodo- and tris(trifluoromethyl)iodo-germane, respectively, with dimethyl-dg cadmium (equations 9 and 10). 

ARO reaction with phenols and alcohols as nucleophiles is a logical extension of HKR of epoxides to synthesize libraries of stereochemically defined ring-opened products in high optical purity. To this effect Annis and Jacobsen [69] used their polymer-supported Co(salen) complex 36 as catalyst for kinetic resolution of epoxides with phenols to give l-aiyloxy-2-alcohols in high yield, purity and ee (Scheme 17). Conducting the same reaction in the presence of tris(trifluoromethyl)methanol, a volatile, nonnucleophilic protic acid additive accelerates KR reaction with no compromise with enantioselectivity and yield. Presumably the additive helped in maintaining the Co(III) oxidation state of the catalyst. 

Krimmel and co-workers ° have reported the synthesis of 2,4,6-tris(trifluoromethyl)-l,3,5-trinitro-l,3,5-triazacyclohexane (123) from the nitrolysis of the nitrosamine (122). 

Tris trifluoromethyl phosphine bums in air, but, unlike its methyl analogue, has not so far been found to form addition compounds with sulphur, carbon disulphide or silver iodide. With chlorine it forms the addition compound P(CF3)3Cl2 (b.p. 94°), and there is some indication that an addition compound of lower stability may be formed with bromine. With either of these halogens at higher temperatures, partial replacement of CF3 by halogen occurs and a similar reaction occurs with iodine, yielding some P(CF3)2l and P(CF3)l2. 

The structures of dimesitylzinc (54) , bis[2,4,6-tris(trifluoromethyl)phenyl]zinc (55) and bis(pentafluorophenyl)zinc (56) have comparable structural features. They are discrete monomeric molecules with a linear C—Zn—C arrangement at zinc (Figure 27). The... 

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