- The preparations and properties of tris(perfluoroorgano)bismuth compounds Bi(Rf)3 (Rf=CF3, C2F5, n-C3F7, n-C4F9, n-C6F13, n-C8H17, C6F5)
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Tris(perfluoroorgano)bismuth compounds Bi(Rf)3 (Rf=CF3, C2F5, n-C3F7, n-C4F9, n-C6H13, n-C8H17, C6F5) are easily prepared in high yields from the reactions of perfluoroorganocadmium complexes with BiCl3 or BiBr3 in aprotic solvents.T
- Naumann, Dieter,Tyrra, Wieland
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- [(C6F5)2if2][BF4], the first salt with the electrophilic cation [(C6F5) 2if2]+: Synthesis, reactivity, and structure
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The substitution of hypervalently bonded fluorine atoms in C 6F5IF4 was performed with C6F 5BF2 and resulted in the new salt [(C6F 5)2IF2][BF4]. The iodonium(V) salt was characterized by multi-NMR and Raman spectroscopy and X-ray crystal structure analysis. The fluorinating ability of the new electrophilic cation [(C6F5)2IF2]+ was exemplified in reactions with monovalent iodine compounds (C6F 5I, p-FC6H4I, and I2) and with electron-poor tri(organyl)pnictanes ER3 (E = P, As, Sb, Bi; R = C6F5). In a heterogeneous reaction with CsF in MeCN the [(C6F5)2IF2]+ cation forms the dinuclear [{(C6F5)2IF 2}2F]+ cation.
- Frohn, Hermann-Josef,Wenda, Andre,Floerke, Ulrich
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p. 764 - 770
(2009/04/13)
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- Silver compounds in synthetic chemistry. 1. A facile preparative route for pentafluorophenylsilver, AgC6F5 and its use as an oxidative pentafluorophenyl group transfer reagent in reactions with group 12 to 16 elements
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AgC6F5 is directly and quantitatively formed from room temperature reactions of AgF and Me3SiC6F5 in N-donor solvents, particularly EtCN. Solutions of AgC6F5 prepared by this method exhibit excellent oxidative properties in reactions with a variety of groups 12 to 16 elements giving the corresponding pentafluorophenyl element compounds in moderate to excellent yields. AgC6F5·EtCN crystallises with monoclinic symmetry (C2/c, Z = 8, a = 2301.4(5)pm, b = 1078.8(4)pm, c = 948.0(2)pm, β = 113.19(1)°) and exhibits chains of silver atoms with bridging C6F5 groups.
- Tyrra, Wieland,Wickleder, Mathias S.
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p. 1841 - 1847
(2008/10/08)
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- Pentafluorophenyliodine(V) Compounds. 2. Pentafluorophenyliodine Tetrafluoride C6F5IF4: Synthesis via Fluorine-Aryl-Subsitution on IF5 - Properties and Structure
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The nucleophilic fluorine-aryl substitution reaction on IF5 with pentafluorophenyl, Bi(C6F5)3, leads to C6F5IF4 in good yields and high purity. The thermal stability of C6F5IF4 and its NMR spectrometric behaviour in solution will be discussed in comparison to IF5. In addition data of themolecular and crystal structure of the monovalent iodine parent compoun d C5F5I will be given.
- Frohn, H. J.,Goerg, S.,Henkel, G.,Laege, M.
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- Structures of Pentaarylbismuth Compounds
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Pentaarylbismuth compounds were synthesized by the known reaction Ar3BiX2 + 2 Ar'Li ---> 2 LiX + BiAr3Ar'2.Whenever possible they were characterized by single-crystal X-ray structure determination.In two cases almost ideal square-pyramidal geometry was found, in a third case there were two different molecules in the unit cell, both again with square-pyramidal geometry.None of these novel bismuth pentaaryls exhibit the deep coloration and the dichroism of Bi(C6H5)5. - Key Words: Bismuth organic compounds / Fluorinated aromatic rings / Square pyramidal bismuth
- Schmuck, Arno,Seppelt, Konrad
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p. 803 - 808
(2007/10/02)
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- Organothallium compounds. VI. Reactions of bromobis(pentafluorophenyl)thallium(III) with main group elements
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Bromobis(pentafluorophenyl)thallium(IlI) reacts with many main group elements on heating in the absence of a solvent to give pentafluorophenyl derivatsves of these elements. The compounds C6F5M (M = Cl, Br, or I), (C6F5)2M (M = Zn, Cd, Hg, S, Se or Te), (C6F5)3M (M = In, P, As, or Sb), and (C6F5)M (M = Ge or Sn) have been prepared by this method. Substantial decomposition of (C6F5)2TlBr occurs on reaction with aluminium, gallium, lead and bismuth, but pcntafluorophenyl derivatives of these elements are not obtained.
- Deacon,Parrott
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p. 287 - 295
(2008/10/08)
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