Four new five-coordinated anionic tin(Ⅳ) complexes with a form of [R_ n NH_ 4- n ][PhSn( μ 2-SCH_2COO)_2] were synthesized via the reaction of mercaptoacetic acid with phenyltin trichloride in the presence of dif...Four new five-coordinated anionic tin(Ⅳ) complexes with a form of [R_ n NH_ 4- n ][PhSn( μ 2-SCH_2COO)_2] were synthesized via the reaction of mercaptoacetic acid with phenyltin trichloride in the presence of different organic bases and characterized by means of IR, 1H NMR and MS spectroscopies. The crystal structure of [( i -Pr)_2NH_2] [PhSn( μ 2-SCH_2COO)_2] was determined by X-ray diffraction. In the crystal structure,the tin atom is five-coordinated and exists in trigonal bipyramid geometry with cell parameters a =1.1766(11) nm, b =1.3144(14) nm, c =1.3336(15) nm,β =90° and Z =4.展开更多
A 1：1 reaction of triphenyltin chloride with potassium N-[（3,5-dibromo-2-hydroxylphenyl）methylene]valinate in benzene led to the formation of a novel mixed organotin dinuclear complex, （HL）SnPh3oPh2SnL [L=2-O-3,5...A 1：1 reaction of triphenyltin chloride with potassium N-[（3,5-dibromo-2-hydroxylphenyl）methylene]valinate in benzene led to the formation of a novel mixed organotin dinuclear complex, （HL）SnPh3oPh2SnL [L=2-O-3,5-Br2C6H3CH=NCH（i-Pr）COO], by means of a facile phenyl-tin bond cleavage process. In the complex, there are two distinct types of carboxylate moieties and a trans-O2SnC2N and a trans-O2SnC3 in distorted trigonal bipyramidal geometries were bridged by a carboxylate group. In vitro antitumor activity of the complex against three human tumour cell lines （HeLa, CoLo205 and MCF-7） was found to be much higher than cis-platin used in clinic.展开更多
A new tin complex Sn（CH3HPPDA）Ch （1） was prepared from SnCh＇5H2O with （2,3-f）-pyrazino（1,10）phenanthroline-2,3-dicarboxylic acid （H2PPDA） by solvothermal reaction in methanol, and characterized by single-cr...A new tin complex Sn（CH3HPPDA）Ch （1） was prepared from SnCh＇5H2O with （2,3-f）-pyrazino（1,10）phenanthroline-2,3-dicarboxylic acid （H2PPDA） by solvothermal reaction in methanol, and characterized by single-crystal X-ray diffraction analysis, optical absorption spectrum and photoluminescence. Compound 1 crystallizes in a monoclinic centrosymmetric space group of P21/c with a = 12.418（2）, b = 11.9467（12）, c = 15.845（3） A, β= 107.948（7）°, V= 2236.2（6） A3, Z = 4, Mr = 594.78, D, = 1.767 g/cm3, μ= 1.651 mm-1, F（000） = 1160, S= 1.023 and T= 293（2） K. The final R = 0.0847 and wR = 0.2431 for 3144 observed reflections with 1 〉 2σ（I）. The discrete mononuclear Sn（CH3HPPDA）CI4 complex is connected into a supramolecular network of 1 by intramolecular and intermolecular C-H...C1 and intermolecular C-H……O hydrogen bonding interactions. Compound 1 displays fluorescence with a lifetime value of about 7.58 ns in the visible region under visible-light excitation, and the origin of the luminescent emission is primarily assigned to the combination of intraligand charge-transfer of CH3HPPDA and C1-to-CH3HPPDA charge-transfer mechanism which is probed by the density of states （DOS） calculations.展开更多
A tin （IV） complex with 4,5-benzo-1,2-dithiol-3-thione （C7H4S3） （A）, [SnCI4 （C7H4S3）2] （B） was synthesized. The structure of the obtained complex （B） was characterized by Infrared Spectroscopy （IR）, anal...A tin （IV） complex with 4,5-benzo-1,2-dithiol-3-thione （C7H4S3） （A）, [SnCI4 （C7H4S3）2] （B） was synthesized. The structure of the obtained complex （B） was characterized by Infrared Spectroscopy （IR）, analysis centesimal composition, and theoretical study. The complex （B） has an octahedral structure, where a tin in the center takes an octahedral geometry and is coordinated by four atoms of chlorine and two thiocarbonyl sulfur atom （C=S） of the ligand.展开更多
The feasibility and technologies of comprehensive recovery of tin, zinc, arsenic and iron from the complex iron ores by selective chlorination roasting were studied by thermodynamic analysis and roasting experiments. ...The feasibility and technologies of comprehensive recovery of tin, zinc, arsenic and iron from the complex iron ores by selective chlorination roasting were studied by thermodynamic analysis and roasting experiments. Investigation shows that the product pellets with the compression strength of 2625N/P, the tumble index of 97.26%, the abrasion index of 1.35%, tin, arsenic and zinc residue of 0.043%, 0.046% and 0.058% respectively can be achieved if balling a concentrate containing 0.39% tin, 0.40% arsenic and 0.28% with addition of 8% coke breeze and 0.5% CaCl2 and roasting the pellets at 10601080℃ for 40min. The volatilization of tin, arsenic and zinc is 91.75%, 93.42% and 81.12% respectively. The performances of the product pellets are able to meet the requirements of blast furnace ironmaking.展开更多
The Au\|SiO\-2 and Sn\|SiO\-2 complexes have been experimentally calibrated at varying temperature, silica concentration and pH: Au\+++H\-3SiO\+-\-4AuH\-3SiO\-4lgK=-1.65436+9611.21/T Sn\+\{4+\}+4H\-3SiO\+-\-4Sn(H\-3Si...The Au\|SiO\-2 and Sn\|SiO\-2 complexes have been experimentally calibrated at varying temperature, silica concentration and pH: Au\+++H\-3SiO\+-\-4AuH\-3SiO\-4lgK=-1.65436+9611.21/T Sn\+\{4+\}+4H\-3SiO\+-\-4Sn(H\-3SiO\-4)\-4lgK\-\{200℃\}=42.73Compared with Au\|Cl, Au\|HS and Sn\|OH complexes, AuH\-3SiO\-4 and Sn(H\-3SiO\-4)\-4 complexes can be recognized as the dominant transport forms in Si\|bearing solutions under pH and Eh conditions of general interest. The decrease of SiO\-2 concentration and oxygen fugacity would reverse the direction of dissolution\|complexing reactions, resulting in the precipitation of gold and silica, as well as cassiterite and silica. This study illustrates the significance of SiO\-2\|complexation in hydrothermal solutions for gold, tin and other metallizations.展开更多
文摘Four new five-coordinated anionic tin(Ⅳ) complexes with a form of [R_ n NH_ 4- n ][PhSn( μ 2-SCH_2COO)_2] were synthesized via the reaction of mercaptoacetic acid with phenyltin trichloride in the presence of different organic bases and characterized by means of IR, 1H NMR and MS spectroscopies. The crystal structure of [( i -Pr)_2NH_2] [PhSn( μ 2-SCH_2COO)_2] was determined by X-ray diffraction. In the crystal structure,the tin atom is five-coordinated and exists in trigonal bipyramid geometry with cell parameters a =1.1766(11) nm, b =1.3144(14) nm, c =1.3336(15) nm,β =90° and Z =4.
基金supported by the Natural Science Foundation of Shandong Province(No.Z2002F01)and Qufu Normal Universiy
文摘A 1：1 reaction of triphenyltin chloride with potassium N-[（3,5-dibromo-2-hydroxylphenyl）methylene]valinate in benzene led to the formation of a novel mixed organotin dinuclear complex, （HL）SnPh3oPh2SnL [L=2-O-3,5-Br2C6H3CH=NCH（i-Pr）COO], by means of a facile phenyl-tin bond cleavage process. In the complex, there are two distinct types of carboxylate moieties and a trans-O2SnC2N and a trans-O2SnC3 in distorted trigonal bipyramidal geometries were bridged by a carboxylate group. In vitro antitumor activity of the complex against three human tumour cell lines （HeLa, CoLo205 and MCF-7） was found to be much higher than cis-platin used in clinic.
基金supported by the Chinese Academy of Sciences(KJCX2-YW-319,KJCX2-EW-H01)the MOST projects(2010CB933501,2012CB821705)the Natural Science Foundation of Fujian Province(2006L2005)
文摘A new tin complex Sn（CH3HPPDA）Ch （1） was prepared from SnCh＇5H2O with （2,3-f）-pyrazino（1,10）phenanthroline-2,3-dicarboxylic acid （H2PPDA） by solvothermal reaction in methanol, and characterized by single-crystal X-ray diffraction analysis, optical absorption spectrum and photoluminescence. Compound 1 crystallizes in a monoclinic centrosymmetric space group of P21/c with a = 12.418（2）, b = 11.9467（12）, c = 15.845（3） A, β= 107.948（7）°, V= 2236.2（6） A3, Z = 4, Mr = 594.78, D, = 1.767 g/cm3, μ= 1.651 mm-1, F（000） = 1160, S= 1.023 and T= 293（2） K. The final R = 0.0847 and wR = 0.2431 for 3144 observed reflections with 1 〉 2σ（I）. The discrete mononuclear Sn（CH3HPPDA）CI4 complex is connected into a supramolecular network of 1 by intramolecular and intermolecular C-H...C1 and intermolecular C-H……O hydrogen bonding interactions. Compound 1 displays fluorescence with a lifetime value of about 7.58 ns in the visible region under visible-light excitation, and the origin of the luminescent emission is primarily assigned to the combination of intraligand charge-transfer of CH3HPPDA and C1-to-CH3HPPDA charge-transfer mechanism which is probed by the density of states （DOS） calculations.
文摘A tin （IV） complex with 4,5-benzo-1,2-dithiol-3-thione （C7H4S3） （A）, [SnCI4 （C7H4S3）2] （B） was synthesized. The structure of the obtained complex （B） was characterized by Infrared Spectroscopy （IR）, analysis centesimal composition, and theoretical study. The complex （B） has an octahedral structure, where a tin in the center takes an octahedral geometry and is coordinated by four atoms of chlorine and two thiocarbonyl sulfur atom （C=S） of the ligand.
文摘The feasibility and technologies of comprehensive recovery of tin, zinc, arsenic and iron from the complex iron ores by selective chlorination roasting were studied by thermodynamic analysis and roasting experiments. Investigation shows that the product pellets with the compression strength of 2625N/P, the tumble index of 97.26%, the abrasion index of 1.35%, tin, arsenic and zinc residue of 0.043%, 0.046% and 0.058% respectively can be achieved if balling a concentrate containing 0.39% tin, 0.40% arsenic and 0.28% with addition of 8% coke breeze and 0.5% CaCl2 and roasting the pellets at 10601080℃ for 40min. The volatilization of tin, arsenic and zinc is 91.75%, 93.42% and 81.12% respectively. The performances of the product pellets are able to meet the requirements of blast furnace ironmaking.
文摘The Au\|SiO\-2 and Sn\|SiO\-2 complexes have been experimentally calibrated at varying temperature, silica concentration and pH: Au\+++H\-3SiO\+-\-4AuH\-3SiO\-4lgK=-1.65436+9611.21/T Sn\+\{4+\}+4H\-3SiO\+-\-4Sn(H\-3SiO\-4)\-4lgK\-\{200℃\}=42.73Compared with Au\|Cl, Au\|HS and Sn\|OH complexes, AuH\-3SiO\-4 and Sn(H\-3SiO\-4)\-4 complexes can be recognized as the dominant transport forms in Si\|bearing solutions under pH and Eh conditions of general interest. The decrease of SiO\-2 concentration and oxygen fugacity would reverse the direction of dissolution\|complexing reactions, resulting in the precipitation of gold and silica, as well as cassiterite and silica. This study illustrates the significance of SiO\-2\|complexation in hydrothermal solutions for gold, tin and other metallizations.
