1,2-dimethyl- -tetraphenylborate

Dimethyl tellurium dichloride, diphenyl tellurium dichloride and heterocyclic tellurium diiodides reacted with sodium tetraphenylborate in methanol or ethanol to produce telluronium tetraphenylborates5. 

Dimethyl Phenyl Telluronium Tetraphenylborate1 0.46 g (2 mmol) of dimethyl telluronium dichloride are dissolved in 30 ml of absolute methanol and a solution of 1.7 g (5 mmol) of sodium tetraphenylborate in 30 ml of methanol is added dropwise with stirring at 20°. Stirring is continued for 2 h, the mixture is filtered, and the solid is recrystallized from ethyl methyl ketone yield 0,81 g (65%) decomposes above 200°. 

Dimethyl and methyl phenyl 4,4-dimethyl-2,6-dioxocyclohexylidene tellurium compounds transferred a methyl group to triethylamine, triphenylphosphane, tris[di-methylamino]phosphane, and triphenylarsane. The methyl onium cations were isolated as tetraphenylborates. The alkylidene organo telluronium intermediate was identified by P-NMR spectroscopy in the reaction of the ylide with tris[dimethylamino]phosphanek... 

Reaction of sodium dithiocarbamate with an equimolar amount of the chloroacetaldehyde/sodium hydrogen sulfite adduct (110) in dimethyl-formamide at room temperature yields 111 quantitatively. The latter, treated first with concentrated sulfuric acid and then with sodium tetraphenylborate, gives the salt 112 in 86% yield.Under the same conditions, piperi-dinium dithiobenzoate reacts with 110 providing in 64% yield 2-phenyl-l,3-dithiolium tetraphenylborate. ... 

RhAs4C102C2]H]2, Rhodium(l + ), (carbon dioxide)bis[o-phenylenebis(dimethyl-arsine)]-, chloride, 21 101 RhBN4Ct,H , Rhodium(I), tetrakis(l-isocy-anobutane)-, tetraphenylborate(l-), 21 50... 

Figure 5. Absorption spectrum of pentaammine (S)-2-chloropropionato cobalt-(III) tetraphenylborate in ("lower set) water (as ClOf salt), hexamethylphosphor-triamide (hmpa), dimethyl sulfoxide, N-metkylformamide (nmf), N,N-dimethyl-formamide (dmf) ("upper set) acetonitrile, methanol, ethanol, acetone, pyridine (py) and tetrahydrofuran (thf). The reference contained tetraphenylborate (as Na salt) at the same concentration as the solution of the complex.

Chlorotris (dimethyl sulfide) platinum (II) tetrafluoroborate was prepared by Gog-gin et al. using cis-[Pt(Me2S)2Cl2] as a starting material.1 The corresponding tetraphenylborate was prepared like the tetrafluoroborate. 

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... 

BNgPgCggHjg, Borate(l —), tetraphenyl-, l,l,l,3,3,3-hexakis(dimethyl-amino)triphosphenium, 27 256 BOPgRhSgCggHj, Borate(l—), tetraphenyl-, [[2-[(diphenyl-phosphino)methyl]-2-methyl-l,3-propanediyl] bis(diphenylphosphine)] (dithiocarbonato)rhodium(III), 27 287 B02P2PtC4oH57, Platinum(II), (3-methoxy-3-o o-KO-propyl- cC )bis(triethy I-phosphine)-, tetraphenylborate(l —), 26 138... 

A systematic study for boronic acid replacements for N—H bond arylations has been investigated, and the outcome compares favorably to the O—H bond arylation reaction (Table 4.6) [17,41]. However, to date no catalytic in copper variations have been reported with these alternative aryl donors. The best donors are triarylborox-ines and boronic acid esters derived from 2,2 -dimethyl-l,3-propanediol and 1,3-propanediol and, as in the case of the O—H bond arylation, the pinacolate esters are poor aryl donors. Sodium tetraphenylborate is also an alternative phenyl donor in the copper] 11)-mediated, microwave-assisted N-arylation using KF-AI2O3 as heterogeneous base in the absence of solvent [30]. 

C60H76B2N1 Ni2 f Di-M azido-bis(2,2, 2"-triaminotriethylamine)dinic kel(II) tetraphenylborate, 41B, 962 CeoHe2B2NeNi03S3, Tris(ethylenediamine)nickel(11) tetraphenylborate - tris(dimethyl sulfoxide), 44B, 823 Ce 2H7 6B2CU2N10 f Bis(cyano-(2,2 ,2"-triaminotriethylamine)copper(II)) bis(tetraphenylborate), 40B, 817... 

With discoveries of boron-based cocatalysts such as triphenyl-boron, ammonium tetraphenylborate salts, and finally pentafiuorophenyl derivatives of borate [B(C6H5)4] , olefin polymerization catalysis was developed without a reliance on alkylaluminum species. Although the activity with nonfiuori-nated boron-based cocatalysts was invariably low, the fiuorinated analogs exhibited olefin polymerization behavior similar to that of metallocene/MAO catalyst systems. The boron and borate compoimds are typically used in a 1 1 molar ratio with transition metal (stoichiometric or near stoichiometric). Because these activators do not alkylate the transition metal, the metallocene precatalyst employed must already bear alkyl groups. Thus, zirconocene dimethyl species combine with boron or borate activators to nerate active cationic polymerization catalysts. Figure 8 shows typical activation reactions with borate (a, b) and boron (c) activators. 

Cocoamidopropyl-iV,iV-dimethylbetaine, cocoam ido betaine, A/- 3-(cocoamido)-propyl -A/-(2-hydroxy-3-sulfopropyl)-N,W-dimethyl betaine, lauriminodi-propionic acid separation by alkyl chain length MerckRP-18p254 80 20 EtOH/aqueous 2% tetraphenylborate Fluorescence quenching 14... 

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