Tris dimethyl

Recently, Aiiwi and Abdullah [42] have investigated the photoinitiation of styrene by oxo-tris(dimethyl dithi-ocarbomato) vanadium (V) (VO(S2CN(CH3)2)3 using light of A = 365 nm. Spectroscopic and kinetic analyses... 

Sugars having a difluoromethylene group were prepared by reaction of an aldehyde group in sugars with difluoromethylene tris(dimethyl-amino)phosphorane some of these were 554- 559. Similarly, (Z)- 560) and f ))-. tw-bromofluoroalkene 561 were prepared from l,2 3,4-di-0-iso-propylidene-a-D-gfl/ac/o-hexodialdo-l,5-pyranose (395) by treatment with Ph3P=CFBr. 

The chromatographic behaviour of condensed phosphates was found to be strongly influenced by water content and pH. The Ry of tris(dimethyl-amino)phosphine chalcogenides is generally lower than those of the trialkyl-phosphine chalcogenides but the difference is greatest for the P " compounds, and whereas the trialkylphosphines have the highest Ry values in the whole series, tris(dimethylamino)phosphine has the lowest. ... 

Difluoromethylenation (79,80) of aldonolactones may be readily accomplished by treatment of the lactone derivative with tris(dimethyl-amino)phosphine, dibromodifluoromethane, and zinc in refluxing tetrahy-... 

B. TRIS(DIMETHYL SULFOXIDE)INDIUM(IIl) CHLORIDE [TRICHLORO-TRIS(DIMETHYL SULFOXIDE)INDIUM(III)]... 

Tris(dimethyl sulfoxide)indium(III) chloride is a white crystalline nonhygro-scopic compound, soluble in alcohols, ethyl acetate, and nitromethane. Decomposition occurs at 130°. The infrared spectrum and the results of thermal stability studies have been reported.6 The presence of dmso can be verified from the infrared spectrum,6 which shows C—H vibrations, and =0 at 945, 960, and 995 cm. ... 

This method has been used to prepare several different tris(dialkyl-amino)sulfonium difluorotrimethylsilicates, including salts with greater organic solubility such as the tris(diethylamino)sulfonium and tris(pyrrolid1ne)sulfon1um2 difluorotrimethylsilicates. The tris(dimethyl-amino)sulfonium salt, however, is highly crystalline and thus has an advantage 1n ease of preparation and purification over these other salts. 

Tris(dimethyl ami no)suIfonium dif1uorotrimethylsi 1icate Sulfur(l + ), tris(N-... 

TetracarbonyI[tris(dimethyl amino)-phosphorus]chromium, AS68 sym-Tetrachloroacetone, AB24 1,1,3,3-Tetrachloroacetone, AB24 N,N,N,N-Tetrachloroacetyleneurea, AC30... 

Tris(dimethyl ami no)phosphorus-tetracarbonylchromium, A 68 Trithion, AT86... 

During some couplings of nucleosides, promoted by dicyclohexylcarbodii-mide (DCC), Pfitzner and Moffatt.13 decided to try dimethyl sulfoxide (DMSO) as solvent. Instead of obtaining the expected couplings, they observed oxidation of alcohols to aldehydes and ketones. These oxidations were very remarkable, because at that time, on the nucleosides tested, no oxidants were known to be able to deliver efficiently the observed aldehydes and ketones. Furthermore, contrary to many other oxidants, no over-... 

Another process of interest in the mass spectra of tris(dimethyl-amino)phosphine derivatives is the elimination of a CH3NCH2 (azapro-pene) fragment. This occurs in ions containing first-row transition metals but no carbonyl groups, e.g. 

An iron nitrosyl carbonyl cation is prepared by disproportionation of mercurybis(iron nitrosyl tricarbonyl) in the presence of tris(dimethyl-amino)phosphine (159). 

However, l,3-diorgano-2-dimethylamino-diazaboracycloalkanes have been prepared by a simple transamination reaction between tris(dimethyl-amino)borane, B[N(CH3)2]3 and a.w-diorgano-polymethylenediamines 29). 

First, dibromodifluoromethane and hexamethylphosporous amide form a phosphonium salt. The intermediate thus formed reacts with tris(dimethyl-amino)phosphine to give dibromotris(dimethylamino)phosphorane and an ylide with difluoromethylene group attached to phosphorus, difluoro-methylenetris(dimethylamino)phosphorane. 

T etraketo-20S6 Tris(dimethyl-sulfidotetrathiafulfvalene)-21S6 (1,4,8,11,15,18) 21UT-7 Thiodiglycolyl dichloride + 1,3-propanedithiol < r-l,2-Dichloroethylene + N S + 15-crown-5 as phase-transfer catalyst... 

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