Bis pentafluorophenyl

Pentafluorophenylmagnesium bromide or lithium can be converted to other pentafluorophenyl organometabics by reaction with the corresponding metal chloride (237). Bis(pentafluorophenyl)phenylphosphine [5074-71-5] (Ultramark 443), (CgF )2CgH P, is offered commercially as a marker for mass spectral standardi2ation (238). 

The KF-S reaction presumably involves attack of a fluonnated caibanion on sulfur, whereas the S-Sbp5 reaction may involve electrophilic attack by a cationic sulfur species on the olefin under the strong Lewis acid conditions Electrophilic attack on a fluonnated olefin may also account for formation of a perfluorinated sulfide from reaction of bis(pentafluorophenyl)disulfide with hexafluoropropylene under superacid conditions [IS5] (equation 28)... 

Bis(pentafluorophenyl)cadmium complexes have been used to prepare tri-methyl(pentafluorophenyl)tin [4 (equation 15)... 

The arylcopper reagents couple with 1-iodoarylacetylenes to give the unsym-metrical diarylacetylenes [25(S] (equation 176) Reaction with tetrabromoethyl- ene gives bis(pentafluorophenyl)acetylene in 66% yield [25S] (equation 177) Pen-tafluorophenyl copper couples with (bromoethynyl)triethylsilane to give C6F5C=CSi(C2H5)3 in 85% yield [259]... 

The heavy alkaline earth metals Ca, Sr, and Ba react with 2 equivalents of NJ -bis(2,6-diisopropylphenyl)formamidine in the presence of bis(pentafluorophenyl)-mercury to afford the bis(formamidinato) species as THF adducts in good to moderate yield (Scheme 23). When the same reactions are carried out in a 1 1 molar ratio, N-p-tetrafluorophenyl-N,N -bis(2,6-diisopropylphenyl)formamidine is isolated as the sole product in all cases (Scheme 23). Other substituted N -bis(aryl)formamidinate complexes of the heavy alkaline earth metals were synthesized accordingly. ... 

Uson, R., Royo, P. and Laguna, A. (1974) Reactions of complexes of gold(I) with bis (pentafluorophenyl)thallium(III) halides. Journal of Organometallic Chemistry, 69(3), 361-365. 

Preparation and properties of stable salts containing mono- or bis-(pentafluorophenyl)aurate(I) and mono-, tris-, or tetrakis-(pentafluorophenyl) aurate(III) ions. Journal of the Chemical Society, Chemical Communications, (10), 353-354. 

Uson, R., Laguna, A., Vicente, J., Garcia, J., Jones, P.G. and Sheldrick, G.M. (1981) Preparation of three- and four-coordinate gold(I) complexes crystal structure of bis [o-phenylenebis(dimethylarsine)]gold(I) bis(pentafluorophenyl)aurate. Journal of the Chemical Society, Dalton Transactions, (2), 655-657. 

Treatment of enantiomerically pure (R,R)- and (A,A)-l,2-bis(pentafluorophenyl)ethane-l,2-diamines with thionyl chloride gave the corresponding thiadiazolidine 1-oxides in high yield <2004BCJ1001>. A series of Aralkyl-substituted thiadiazolidine 1,1-dioxides 171 were also prepared from the starting 1,2-diamine 170 by treatment with sulfamide followed by a regioselective monoalkylation (Scheme 26) <2005BML4212>. 

Bismuth tritelluride, 4 24 physical properties of, 4 20t Bismuth trithiocyanate, 4 25 Bismuth Vanadate Yellow, 19 405-406 pigment for plastics, 7 370t Bismuthyl carbonate hemihydrate, 4 25 Bismuthyl nitrate hemihydrate, 4 25 Bismuthyl nitrite hemihydrate, 4 25 Bis(lV-maleimidomethyl) ether (BME), hemoglobin modifier, 4 113 Bisoprolol fumarate, molecular formula and structure, 5 156t Bis(pentafluorophenyl)borane, 13 638 Bis(pentafluorophenyl)tri-4-tolylbismuth, 4 35... 

Bis(cyclopentadienyl)pentafluorophenylzirconium hydroxide, 3703 Bis(pentafluorophenyl)aluminium bromide, 3418... 

Ir-complexes also demonstrate catalyhc achvity in the intermolecular [2+2+2] cycloaddition of three monoalkynes, when Takeuchi examined the mixed cyclotrimerization of two alkynes. In this situation the choice of ligand was shown to determine the excellent chemoselechvity for example, when the Ir-dppe complex was used, 2 1 cycloadducts of DM AD and mono- or disubstituted alkynes were obtained, but when Ir-F-dppe (l,2-bis[bis(pentafluorophenyl)phosphino]eth ane) one was used, a 1 2 cycloadduct of DMAD and l,4-dimethoxybut-2-yne was obtained (Schemes 11.7 and 11.8) [15]. A regioselective cyclotrimerizahon of three alkynes was achieved by [lrH(cod)(dppm)] (bis(diphenylphosphino)methane), and 1,2,4-triarylbenzenes were obtained exclusively (Scheme 11.9) [16]. 

There are many examples today of polynuclear metal complexes yielding a parent ion in the mass spectra, but initially their observation for high molecular weight compounds, such as di[bis(pentafluorophenyl)-phosphidoirontricarbonyl] (I), having a molecular ion of mje 1010 (90) was considered unusual, as were the binuclear chromium complexes (II)... 

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... 

In contrast to the extensive investigation of fluorovinylzinc reagents and their synthetic utility, only limited literature exists on fluorinated arylzinc reagents. Bis(pentafluorophenyl) zinc can be prepared by the reaction of zinc chloride with either pentafluorophenyllithium or pentafluorophenylmagnesium bromide (equation 70)64,65. An alternative route is via decarboxylation of zinc bis(pentafluorobenzoate) (equation 71)65. 

Several forms of bis(pentafluorophenyl)zinc have been observed65. The high temperatures employed in the decarboxylation route illustrate the thermal stability of the aryl zinc reagents. 1 1 Metal complexes, such as 2,2 -bipyridine and 1,10-phenanthroline, are... 

Similar to the zinc insertion methodology for the preparation of fluorinated vinylzinc reagents (Section II.C), zinc reacts quantitatively with bromo- and iodopentafluorobenzene in coordinating solvents such as THF, Et20, DME, DG (diglyme), DMF, DMAC and DMSO to give bis(pentafluorophenyl)zinc (equation 72)68. These workers also obtained equilibrium constants for the Schlenk equilibrium between the mono/bis species via 19F NMR spectra. 

Our first study of these systems was the synthesis in 1998 of the polymeric complex [ 1( 6 5)2( )2] through the reaction between triphenylphosphine oxide, thallium nitrate and lithium bis(pentafluorophenyl)aurate(I) [71]. This complex consisted of an extended unsupported linear chain of alternate gold and thallium centers. These atoms displayed Au-Tl interactions of 3.0358(8) and 3.0862(8) A, and the thallium atoms showed a distorted pseudo-trigonal-bipyramidal environment, taking into account the stereochemically active inert pair of this atom. As described below, the environment around thallium is one of the main factors that affects the optical properties of these mixed systems. 

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