Benzene-, tetraphenylphosphonium

The tetraphenylphosphonium benzenetellurolate is soluble in ethanol and chloroform, but insoluble in petroleum ether, benzene, diethyl ether, and tetrahydrofuran. 

Tetraphenylphosphonium benzene tellur olate was obtained as a precipitate when tetra-phenylphosphonium chloride and sodium or potassium benzenetellurolate were mixed in liquid ammonia" . 

There are various methods for the synthesis of cyclopropyltriphenylphosphonium bromides, the precursor of choice for the preparation of cyclopropylidenetriphenylphosphoranes. Interestingly, attempts to generate the former salt from cyclopropane derivatives, e.g. 1-bromocy-clopropane, have been unrewarding. One exception is the reaction of cyclopropyllithium with tetraphenylphosphonium bromide followed by elimination of benzene from the initial adduct. The intermediate phosphorane 5 was converted into phosphonium salt 13 by reaction with hydrogen bromide. 

G. BIS(TETRAPHENYLPHOSPHONIUM TETRAKIS(BENZENE-THIOLATO)TETRA-/u3-THIO-TETRAFERRATE-(II,III)... 

CdP2S4C72H o, Cadmate(II), tetrakis(benzene-thiolato)-, bis(tetraphenylphosphonium), 21 26... 

CoNO PjRu Hm, Ruthenate(l -), trideca-carbonylcobalttri-, p.-nitrido-bis(triphenyl-phosphorusX 1 +), 21 61 C0P2S4C72H60, Cobaltate(II), tetrakis(benzene-thiolato)-, bis(tetraphenylphosphonium), 21 24... 

Bis (2,2 biphenylene)phosphorane (6.481) decomposes spontaneously at room temperature in benzene under nitrogen, via a violet phosphoranyl radical (13.197) (exposure to air and water gives a phosphine oxide). A phosphoranyl radical is probably involved when tetraphenylphosphonium chloride is obtained by heating pentaphenylphosphorane in chloroform solution (13.198). 

The alkaline decomposition of tetraphenylphosphonium chloride to triphenyl-phosphine oxide and benzene has been studied as a function of temperature in a wide range (0—80%) of aqueous dioxan mixtures. The rate law is first order in phos-phonium ion and second order in hydroxide ion the rate is greatly increased by increasing the dioxan content k = 19.6 exp (-33 500//jr) in HgO and 10.7 exp (-10 630fRT) in 80% dioxan (k in mol dm s ). The mechanism proposed is as follows ... 

D. TETRAPHENYLPHOSPHONIUM-DI-COBALT(III)-k k -[1,2A5-TETRAKIS(2-OXY-2-METHYLPROPANAMIDO)BENZENE] [PPh4][CofK K -r-HMPA-B)] ... 

C32H32Nb02 0,5 CgHg, Dicyclopentadienyl-(diphenylacetylene)-pivaloyl-niobium benzene solvate, 45B, 918 C32H3nCl302PPt, Tetraphenylphosphonium trichloro-(2,5-dimethylhex-3-yne-2,5-diol)platinate(II), 39B, 599 C3 2HgoNiP2 f Tetramethylethylene-1,2-bis(dicyclohexylphosphino)eth-anenickel, 40B, 735... 

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