Platinum tetrafluoroborate

C7 3HgoBClFi,Pi,Pt2S2 0.2 CH2CI2, Bis(triphenylphosphine)((trans-bis(triphenyIphosphine)chloroplatino)dithiocarboxylato)platinum tetrafluoroborate dichloromethane, 41B, 875 C78HnoAs203oPt15, Bis(tetraphenylarsonium) pentakis(triplatinumhexa-carbonyl), 40B, 638... 

Figure 8.7 shows such a flow plot for the radical cation of the viologen species, l,l -bis(p-cyanophenyl)-4,4 -bipyridilium ( CPQ ), as the bis(tetrafluoroborate) salt in propylene carbonate solution, with the radical having been formed at a polished platinum electrode. The plot is seen to be linear, implying that, once formed, the CPQ radical cation is chemically stable. 

There are a few reports of poly(naphthalene) thin films. Yoshino and co-workers. used electrochemical polymerization to obtain poly(2,6-naphthalene) film from a solution of naphthalene and nitrobenzene with a composite electrolyte of copper(II) chloride and lithium hexafluoroarsenate. Zotti and co-workers prepared poly( 1,4-naphthalene) film by anionic coupling of naphthalene on. platinum or glassy carbon electrodes with tetrabutylammonium tetrafluoroborate as an electrolyte in anhydrous acetonitrile and 1,2-dichloroethane. Recently, Hara and Toshima prepared a purple-colored poly( 1,4-naphthalene) film by electrochemical polymerization of naphthalene using a mixed electrolyte of aluminum chloride and cuprous chloride. Although the film was contaminated with the electrolyte, the polymer had very high thermal stability (decomposition temperature of 546°C). The only catalyst-free poly(naphthalene) which utilized a unique chemistry, Bergman s cycloaromatization, was obtained by Tour and co-workers recently (vide infra). 

BF404WC,]Hm, Tungsten(l +), (acetone)-tricarbonyl(r 5-cyclopentadienyl)-tetrai1uoroborate(l -), 26 105 BF40,ReC5, Rhenium, pentacarbonyl-[tetrafluoroborato(l —)]-, 26 108 BF405ReC7H4, Rhenium(l+), pentacar-bonyl-(-r)2-ethene)-tetrafluoroborate( 1 —), 26 110 BO PtC Fl, Platinum(II), (3-methoxy-3-oxo-KO-propyl-KC )bis(triethyl-phosphine)-... 

In another example13 the oxidation of propene is carried out with an electrolyte consisting of dichloromcthane containing 0.2 M tetrabutylammonium tetrafluoroborate and 2 % acetic acid. The potential of the platinum anode is controlled at 3.05 V versus aqueous SCE. The two major products are 3-acetoxyprop-1-ene (20%) and l-acetoxy-2-fluoropropane (30%). 

The electrochemical oxidation of tertiary phosphanes, R3P, can be carried out with a platinum electrode in acetonitrile with the addition of pentylammonium fluoride and with the electrolyte tetraethyl ammonium tetrafluoroborate.65 The observed product is the trialkyldi-fluoro-25-phosphane R3PF2. The electrolysis is carried out in a galvanostatic mode with a current density from 3.3 to 6.7 mA cm-2. The anodic oxidation may be represented by the following equation ... 

C. frans-CHLORO- (p-FLUOROPHENYLDIIMIDE) -BIS(TRIETHYLPHOSPHINE)PLATINUM(II) TETRAFLUOROBORATE... 

A solution of 1.38 g. of irons-chloro-(p-fluorophenyldiimide)-bis(triethylphosphine)platinum(II) tetrafluoroborate in 10 ml. of methanol is stirred and cooled to 0°C. in a 50-ml. Erlenmeyer flask while a solution of 0.27 g. of sodium acetate trihydrate in 5 ml. of 50% aqueous methanol is added over a period of 1 minute. The mixture becomes red immediately, and a violet precipitate forms. The mixture is stirred for 5 minutes at 0°C. and then is filtered promptly. After drying under vacuum to remove methanol, recrystallization from hexane (about 30 ml.) gives rose-colored needles (m.p. 116-117°C.) of trans-chloro-... 

In all experiments the electrolyte was the highest quality tetra-n-butyl ammonium tetrafluoroborate furnished by Eastman and J.T. Baker, the working electrode was glassy carbon (area 0.31 cm2) polished before each scan, except in film formation studies. The reference electrode was saturated calomel, and the auxiliary electrode was platinum wire. Electrodes and cells were purchased from Princeton Applied Research (PAR). The instrument was a PAR Model 170 Electrochemistry System, Serial No. 16109. 

The complexes (l,5-cyclooctadiene)(2,4-pentanedionato)-palladium(II) and platinum(II) tetrafluoroborate are air-stable solids, soluble in polar organic solvents such as chloroform, methylene chloride, acetonitrile, acetone, or methanol but insoluble in nonpolar solvents such as alkanes, benzene, or ether. Their solutions in acetone have conductivities typical of 1 1 electrolytes. Their proton magnetic resonance spectra (in CDC13 solutions, internal tetramethylsilane reference at 60 MHz.) show peaks due to coordinated cyclooctadiene at 3.78 and 6.7-7.4r (Pd) and at 4.25 and 6.9-7.6r (Pt) and due to the chelated /3-diketone at 4.39 and 7.88r (Pd) and at 4.15 and 7.81r (Pt) with the expected area ratios. In the spectrum of the platinum compound coupling with the 95Pt isotope (33 %... 

Chloro(l,5-cyclooctadiene) (triphenylarsine)platinum(II) tetrafluoroborate is a white, air-stable solid. It is sparingly soluble in polar organic solvents and insoluble in nonpolar ones. A 10-3 M solution in acetone shows a conductivity characteristic of a 1 1 electrolyte.1 Its proton magnetic resonance spectrum (in liquid sulfur dioxide solution, at 60 MHz., with internal tetramethylsilane reference) shows bands due to the coordinated olefin at 3.59 [two protons 55 Hz.], 5.01 [two... 

Chloro (1,5-cy clooctadiene) (triphenylarsine)platinum (II) tetrafluoroborate, 13 64 UAs(C6H5)3)PtCl(CuH1902)] [8-(l-Acetylacetonyl)-4-cyclo-octen-l-yl]chloro(triphenylarsine) platinum(II), 13 63 [ As(C6H6)3)2Pd(SCN)2], 12 221 ... 

PtCl(C8Hi2)(As(C8H5)3)] Chloro (1,5-cyclooctadiene) (triphenyl-arsine)platinum(II) tetrafluoroborate, 13 64... 

The reaction of (93b) with Pt(COD)Cl2 gave (96) and when the reaction was carried out in the presence of silver tetrafluoroborate, the crystalline salt (97) was formed. An X-ray crystallographic structure determination of (97) showed a distorted tbp around phosphorus with the platinum fragment in an equatorial position and a near square-planar coordination geometry around the Pt atom. On heating to 60°C, (97) lost cyclooctadiene to form (98). Variable temperature P NMR studies were reported for (96) and (97). This work, using ligands (92) and (93a), was extended to complexes of Pt and Rh with similar results. ... 

BBr3, [ °B]Boron bromide, 22 219 BaF4PtS3CiiHi , Platinum(II), chlorotris-(dimethyl sulfide)-, tetrafluoroborate-(1-), 22 126... 

O3BF4RU2C15H13, Ruthenium(l+), jLCarbonic acid cobalt complexes, 21 120, 23 107, 112 platinum chain complex, 21 153, 154... 

Hexafluorophosphates are slightly more resistant toward anodic oxidation than tetrafluoroborates and perchlorates [444] in a 0.1 M solution of these salts in acetonitrile the potentials (versus Ag/0.1 M Ag" " electrode) at a platinum disk electrode (0.12 cm2) 1 mA were for perchlorate, 2.48 V for tetrafluoroborate, 2.91 V and for hexafluoropho-sphate, 3.02 V [444]. Hexafluoroarsenates have been used in liquid SO2 [432,433]. 

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