The First Organoxenon(IV) Compound: Pentafluorophenyldifluoroxenonium(IV) Tetrafluoroborate

Abstract

Xenon(IV) - carbon bonding has been realized for the first time in the product formed from the reaction of XeF(4) with C(6)F(5)BF(2) in CH(2)Cl(2) at -55 degrees C [Eq. (1)]. [C(6)F(5)XeF(2)][BF(4)] is a strong oxidative fluorinating agent. This xenon(IV) compound fluorinates (C(6)F(5))(3)P to (C(6)F(5))(3)PF(2), C(6)F(5)I to C(6)F(5)IF(2), and I(2) to IF(5). In all cases, [C(6)F(5)Xe][BF(4)] was obtained as a by-product.

Polyvalent perfluoroorgano- and selected polyfluoroorgano-halogen(III and V) compounds

“…As an alternative to elemental fluorine, the following fluorinating agents can be used for the conversion of R F I to R F IF 2 : XeF 2 (R F = C 3 F 7 [17], C 4 F 9 [18], CF 3 CH 2 [18,19], C 6 F 5 [17,20], 2,3,5,6-C 5 F 4 N [21]) [C 6 F 5 XeF 2 ] + (R F = C 6 F 5 [22]), ClF (R F = C 6 F 5 [10]), ClF 3 (R F = C 2 F 5 , n-and i-C 3 F 7 , C 4 F 9 , C 6 F 13 , C 10 F 21 [6,23,24]; BrF 3 (R F = C 4 F 9 [6,24]), C 6 F 5 BrF 2 (R F = C 6 F 5 [10]), BrF 5 (R F = C 2 F 5 , C 4 F 9 [6,24]), C 6 F 5 BrF 4 (R F = C 6 F 5 [10]), and [(C 6 F 5 ) 2 IF 2 ] + (R F = C 6 F 5 [25,26]). The action of halogen fluorides often results in a mixture of R F IF 2 and R F IF 4 , and it was difficult to optimise the reaction conditions for the preparation of pure products.…”

“…(22)). In contrast to (C 6 F 5 ) 2 IF, (C 6 F 5 ) 3 I shows two different types of C 6 F 5 groups ( 19 F NMR): one in a 2c-2e mode and two (with a more anionic character) in a 3c-4e mode.…”

C6F5XeF, a versatile starting material in xenon–carbon chemistry

“…The development of the following decade which included alkynyl-, cycloalkenyl-, and alkenyl-in addition to arylxenon(II) compounds was summarised in two reviews [4]. Additionally, one example of a xenon(IV)-carbon compound is known: [C 6 F 5 XeF 2 ] [BF 4 ] [5].…”

Spectroscopy of the XeC2 molecule in xenon, argon, and krypton matrices

“…Although most compounds known today contain either a Xe-F or Xe-O bond, examples of Xe-Cl, Xe-Br, Xe-I, Xe-S, Xe-N, Xe-C, and Xe-B (tentatively) have also been found by now. Although many of these may be regarded as metastable species, several (such as XeF 2 ) salt-like compounds with a C-Xe bond in the cationic part, and recently a neutral C 6 H 5 XeF compound, are actually thermodynamically stable compounds used in preparative chemistry (11)(12)(13).…”