The reaction between sodium perfluoroalkanesulfinate(1)(Rf=a,Cl(CF_2)_4;b, Cl(CF_2)_6;c,Cl(CF_2)_8;d,n-C_6F_(13);e,n-C_8F_(17);f,H(CF_2)_4OCF_2CF_2)and phosphorus trichloride in acetonitrile at 0℃ resulted in the for...The reaction between sodium perfluoroalkanesulfinate(1)(Rf=a,Cl(CF_2)_4;b, Cl(CF_2)_6;c,Cl(CF_2)_8;d,n-C_6F_(13);e,n-C_8F_(17);f,H(CF_2)_4OCF_2CF_2)and phosphorus trichloride in acetonitrile at 0℃ resulted in the formation of an unstable intermediate,which was hydrolysed directly with aqueous sodium hydro- xide solution to give the corresponding perfluorocarboxylic acid in good yield.展开更多
The research on the roast reaction mechanism of bastnasite concentrate mixture with Na 2CO 3 was carried out by means of thermal, X ray diffraction and chemical analyses. The isomorphous substitution, F -+Ce 3+...The research on the roast reaction mechanism of bastnasite concentrate mixture with Na 2CO 3 was carried out by means of thermal, X ray diffraction and chemical analyses. The isomorphous substitution, F -+Ce 3+ (Pr 3+ )→O 2- +Ce 4+ (Pr 4+ ), occurred and isomorphous mixed crystal, REO 1+x F 1-x (0< x <1), grew while roasting concentrate mixed with Na 2CO 3. REO 1+x F 1-x with different compositions were produced under different roasting conditions. It has been found that the lattice constant of REO 1+x F 1-x was a linear function of the content of fluorine: a 0=0 5499+0 00102 c F - (nm).展开更多
The palladium chloride-catalyzed Suzuki coupling reaction of sodium tetraphenylborate with hypervalent iodonium salts was achieved under microwave irradiation in water without base in excellent yield. A convenient and...The palladium chloride-catalyzed Suzuki coupling reaction of sodium tetraphenylborate with hypervalent iodonium salts was achieved under microwave irradiation in water without base in excellent yield. A convenient and rapid method for formation of carbon-carbon bonds was afforded.展开更多
A simple and general method for the synthesis of bi(acyl)disulfides is reported.Sulfur is allowed to react with sodium hydroxide to give sodium disulfide at 65℃ under PTC,which can react with acyl halides to afford b...A simple and general method for the synthesis of bi(acyl)disulfides is reported.Sulfur is allowed to react with sodium hydroxide to give sodium disulfide at 65℃ under PTC,which can react with acyl halides to afford bi(acyl)disulfides in good to excellent isolated yields.The effects of solvents and phase transfer catalysts are discussed.展开更多
文摘The reaction between sodium perfluoroalkanesulfinate(1)(Rf=a,Cl(CF_2)_4;b, Cl(CF_2)_6;c,Cl(CF_2)_8;d,n-C_6F_(13);e,n-C_8F_(17);f,H(CF_2)_4OCF_2CF_2)and phosphorus trichloride in acetonitrile at 0℃ resulted in the formation of an unstable intermediate,which was hydrolysed directly with aqueous sodium hydro- xide solution to give the corresponding perfluorocarboxylic acid in good yield.
文摘The research on the roast reaction mechanism of bastnasite concentrate mixture with Na 2CO 3 was carried out by means of thermal, X ray diffraction and chemical analyses. The isomorphous substitution, F -+Ce 3+ (Pr 3+ )→O 2- +Ce 4+ (Pr 4+ ), occurred and isomorphous mixed crystal, REO 1+x F 1-x (0< x <1), grew while roasting concentrate mixed with Na 2CO 3. REO 1+x F 1-x with different compositions were produced under different roasting conditions. It has been found that the lattice constant of REO 1+x F 1-x was a linear function of the content of fluorine: a 0=0 5499+0 00102 c F - (nm).
基金Financial support from the Natural Science Foundation of Zhejiang Province(Project Y404016)the Education Foundation of Zhejiang Province(Project 20040569)is greatly appreciated.
文摘The palladium chloride-catalyzed Suzuki coupling reaction of sodium tetraphenylborate with hypervalent iodonium salts was achieved under microwave irradiation in water without base in excellent yield. A convenient and rapid method for formation of carbon-carbon bonds was afforded.
文摘A simple and general method for the synthesis of bi(acyl)disulfides is reported.Sulfur is allowed to react with sodium hydroxide to give sodium disulfide at 65℃ under PTC,which can react with acyl halides to afford bi(acyl)disulfides in good to excellent isolated yields.The effects of solvents and phase transfer catalysts are discussed.
