Tetrakis palladium tetrafluoroborate

A, Dimethyl (s)-2-hexenedioate. A 100-roL, one-necked, round-bottomed flask is capped by a septum, swept with dry nitrogen and flame-dried. The flask is charged with methyl acrylate (50 ml, 0.55 mol. Note 1), then anhydrous lithium tetrafluoroborate (9 g, 0.096 mol, Note 2), and finally tetrakis(acetonitrile)palladium tetrafluoroborate (1.33 g, 0.003 mmol. Note 3). The mixture is stirred briefly until homogeneous. It is warmed under nitrogen in a 40°C-o11 bath for 72 hr (Note 4) and then allowed to cool to room temperature. The mixture is added to saturated aqueous sodium bicarbonate (100 mt) and extracted with ether (3 x 50 mt). The combined ether extracts are dried over anhydrous magnesium sulfate, filtered and concentrated to an oil with a rotary evaporator. The residue is distilled through a lO-cm... 

Propano1, titanium (4+) salt (546-68-9), 65, 230 Tetrakis(acetonitrile)palladium tetrafluoroborate (21797-13-7),... 

Several catalyst systems have been described for the tail-to-tail dimerization of methyl acrylate.7 -7 Advantages of the dimerization procedure described here are its mild conditions, efficient use of the catalyst, and high selectivity for the b isomer. Tetrakis(aceto-nitnle)palladium tetrafluoroborate, Pd (NCMe)4(BF )2, also efficiently catalyzes dimerization of ethyl acrylate and methyl methacrylate. The presence of lithium tetrafluoroborate in the reaction mixture increases the rate of the reaction and prolongs catalyst life. Dimerization of methyl acrylate can be effected without lithium tetrafluoroborate if the reaction is performed in mtromethane. 

Methyl acrylate 2-Propenoic acid, methyl ester (9) (96-33-3) Tetrakis(acetomtrile)palladium tetrafluoroborate Palladium(2+), tetrakis(acetonitrile)-, bis[tetrafluoroborate (1-)] (8,9), (21797-13-7)... 

Palladium, tetrakis(acetonitrile)-, tetrafluoroborate, 66, 52 Palladium, tetrakis(triphenylphosphine)- (14221-01-3),... 

The apparatus and techniques used are similar to those for the synthesis of tetrakis(acetonitrile)palladium(II) bis[tetrafluoroborate(l —)]. A 100-mL round-bottomed flask (B) is charged with 2.0 g (7.6 mmol) of hexacar-bonylmolybdenum (Alfa) and 1.77 g (15.2 mmol) of nitrosyl tetrafluorobo-rate (Aldrich, sublimed 220°C, 10-3torr). Dry acetonitrile (50mL) is added and the solution is allowed to stir at 25 °C until no hexacar-bonylmolybdenum remains (6 h). 

FsB2MoN602Hi2, Molybdenum(II), tetrakis(acentonitrile)dinitrosyl-c -bis[tetrafluoroborate( 1 —)], 26 123 F8B2N4PdCnH,2, Palladium(II), tetrakis-(acetonitrile)-... 

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