Rhodium tetraphenylborate

The cationic rhodium catalyst in Scheme 8.8 is rendered soluble in SCCO2 by the anion, BArF, a perfluorinated tetraphenylborate counter-anion (Figure 8.9). 

NO6VC14H20, Vanadate(l-), hexacarbonyl-, tetraethylammonium, 34 98 NRh4C2iH35-H20, Rhodium(lll), tricyano(pen-tamethylcyclopentadienyl)-, tetraethylammonium, monohydrate, 34 167 N2AIBO4C58H74, Aluminum, dimethanol-1,2-bis(2-hydroxy-3,5-bis(tert-butyl)benzyhde-neimino)ethane-, tetraphenylborate,... 

Tetrafluoroborate,223 tetraphenylborate and iodide227 salts of a large range of rhodium(I) complex cations react oxidatively with dioxygen (equation 242). The physical properties of the dioxygen complexes are given in Table 80. The claim that a rhodium(I) species containing a ditertiary arsine... 

BNsOCaHw, Borane, (ethylcarbamoyl)-compd. with tiimethylamine (1 1), 25 83 BNaRhCaaHsa, Rhodium(I), tetrakis(l-iso-cyanobutane)-, tetraphenylborate(l -), 21 50... 

PjBORhSjCttH, Rhodium(III), [[2-[(di-phenylphosphino)methyl]-2-methyl-l,3-propanediyl]bis(diphenylphosphine)]-(dithiocarbonato)-, tetraphenylborate (1-), 27 287... 

Isocyanobutane (0.5 mL) is added to a stirred suspension of 0.25 g (0.50 mmole) dichlorobis(l,5-cyclooctadiene)dirhodium(I) in 15 mL methanol. The red-orange solution is filtered to remove any unreacted starting material. A solution of 0.41 g (1.2 mmole) sodium tetraphenylborate in 5 mL methanol is added to precipitate the product as yellow needles. The product is collected by filtration and washed with methanol. Purification of [Rh(n-C4H9NC)4] [BPh4] is achieved by recrystallization from dichloromethane/ethanol, mp 117-118°. The purple coloration of solutions of this yellow solid is caused by self-association of the planar monomer to form rhodium-rhodium-bonded dinuclear cations. 

BN RhC44HM, Rhodium , tetrakis(l-isocy-anobutane)-, tetraphenylborate(l -), 21 50 BN C Hio, Borate(l -), hydrotris(pyrazolato)-, copper complex, 21 108 BN6Ci5H22, Borate(l -), tris(3,5-dimethylpyr-azolato)hydro-, copper complex, 21 109 BN8Ci2Hi2, Borate(l-), tetrakis(pyrazolato)-, copper complex, 21 110 BjFeN CjoH,, Iron(II), [tris[p.-[(l,2-cy-clohexanedione dioximato)-0 0 ]diphenyl-diborato(2 — )]-NJI JI" X " JI"",... 

RI1AS4CIO2C21H32, Rhodium(l +), (carbon dioxide)bis[o-phenylenebis(dimethylar-sine)]-, chloride, 21 101 RhBN4C44H56, Rhodium(l), tetrakis(l-isocy-anobutane)-, tetraphenylborate(l —), 21 50 RhN3Si5H 2, Rhodate(III), tris(pentasulfldo)-, triammonium, 21 15... 

Rh2B2N4P4Cu8Hi2o, Rhodium(I), tetrakis(l-isocyanobutane)bis[methylene(diphenylphos-phine)]di-, bis[tetraphenylborate(l -)), 21 49 RUC16H26, Ruthenium(O), bis(r 2-ethylene)(r < -hexamethylbenzene)-, 21 76 RuCi8H26, Ruthenium(0), (n4-l,3-cyclohexa-diene)(T) -hexamethylbenzene)-, 31 77 RUCIP2C41H33, Ruthenium(Il), chloto(n5-cy-clopentadienyl)bis(triphenylphosphine)-, 21 78... 

Arylation reactions of aromatic ketimines were developed, and in many cases the products of the reaction were isolated after subsequent hydrolysis. Therefore, these arylations constitute an indirect method for the preparation of arylated aromatic ketones, the direct functionalizations of which are often more difficult. Thus, direct arylation of imine 42 with sodium tetraphenylborate catalyzed by [RhCl(cod)]2 afforded a mixture of mono- and diarylated benzophenone imines (44 and 45) (Scheme 9.16) [53]. The formation of the corresponding amine 46 clearly indicated that 42 also acted as a hydride acceptor in this transformation. Most likely, the reaction occurs via initial coordination by the benzophenone imine to a phenylrho-dium intermediate followed by orfho-rhodation to afford the five-membered rhoda-cyde intermediate 47 (Scheme 9.16). Subsequent reductive elimination generates the monophenylated product 44 and a rhodium hydride, which then reduces imine 42 in the presence of ammonium chloride as proton donor to regenerate the catalytically active speties. 

B2N4P4Rh2C aH,20, Rhodium(l), tetrakis-(1 -isocyanobutane)bis[methylenebis-(diphenylphosphine)ldi-, bis[tetraphenylborate(l -)], 21 49 BjNACsoHm, Borate(2-), tris[p.-[(l,2-cy-clohexanedione dioximato)-0 O ]diphenyldi-, iron complex, 21 112 B20,Ci4H2g, Boron, bis-p-(2,2-dimethylpropa-noato-0,0 ),-diethyl-p.-oxo-di-, 22 196 B2S3C2H6, [l0B2]-l,2,4,3,5-Trithiadiborolane, 3,5-dimethyl-, 22 225... 

ReCINjOjC oHa, Rhenium(V), dioxotetra-kis(pyridine)-, chloride trans-, 21 116 ReCIN406CxlHa, Rhenium(V), dioxotetra-kis(pyridine)-, perchlorate, trans-, 21 117 RhAs4ClC2oH32, Rhodium(l +), bis[o-phenyl-enebis(dimethylarsine)]-, chloride, 21 101 RhAs4C102C21H32, Rhodium( 1 +), (carbon dioxide)bis[o-phenylene-bis(dimethylarsine)]-, chloride, 21 101 RhBN4C44H56, Rhodium(l), tetrakis( I-isocyano-butane)-, tetraphenylborate(l -), 21 50 RhN,S Hl2, Rhodate(III), tris(pentasulfido)-, triammonium, 21 15... 

Dithiocarbonato)[l, 1, l-tris(diphenyiphosphinomethyl)ethane]rhodium(lII) tetraphenylborate has been prepared in 39% yield by a four-step reaction involving, as a starting point, the synthesis of the complex... 

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