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Synthesis and Characterization of Diorganotin Compounds {[R_2Sn(ON=CHC_6H_5)]_2O}_2 and Crystal Structure of {[(C_6H_5CH_2)_2Sn(ON=CHC_6H_5)]_2O}_2

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Chinese Journal of Chemistry 2004年第10期22卷 1187-1191页

作者：尹汉东薛绳才王其宝 Department of Chemistry Liaocheng University Liaocheng Shandong 252059 China

Diorganotin compounds {[R2Sn(ON=CHC6H5)]2O}2 [R=C6H5CH2 (1), 2-FC6H4CH2 (2), 4-FC6H4CH2 (3), 2-ClC6H4CH2 (4), 4-ClC6H4CH2 (5)] were synthesized by the reaction of R2SnO with HON=CHC6H5 in 1∶1 mo-lar ratio in refluxing anhydrous benzene or toluene. They were characterized by elemental analysis, IR, 1H NMR and 119Sn NMR spectroscopy. And two sets of 119Sn chemical shifts were observed in the 119Sn NMR spectra of these compounds, indicating the presence of two types of environment around the tin atoms. The crystal structure of compound 1 was determined by X-ray single crystal diffraction analysis. The results showed that the crystal of com-pound 1 belongs to a monoclinic system with space group P21/c and unit cell dimensions: a=1.0718(9) nm, b=1.9666(17) nm, c=2.0480(17) nm, =96.4371(14)? Dc=1.450 g/cm3, Z=2, F(000)=1888, V=4.290(6) nm3, =1.206 mm-1, R1=0.0405, wR2=0.0786. The compound 1 belongs to centrosymmetric dimer structure mode with a four-membered central endo-cyclic Sn2O2 unit in which the bridging oxygen atoms are tri-coordinated. Each bridging oxygen atom also connects with an exo-cyclic tin atom. The endo- and exo-cyclic tin atoms are both five-coordinated, and have coordination geometry of distorted trigonal bipyramid.

关键词： diorganotin compound benzaldoxime systhesis crystal structure

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Synthesis,Characterization and Crystal Structure of the Dimeric Organotin Compound:{[n-Bu_(2)Sn(O_(2)CCH_(2)CS_(2)NC_(4)H_(8))]_(2)O}_(2)

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无机化学学报 2004年第4期20卷 421-425页

作者： YIN Han-Dong XUE Sheng-Cai WANG Qi-Bao Department of Chemistry Liaocheng UniversityLiaocheng 252059

The title compound,{[n-Bu_(2)Sn(O_(2)CCH_(2)CS_(2)NC_(4)H_(8))]_(2)O}_(2),has been synthesized by the reaction of(tetrahydro-pyrrodithiolocarbamoylthio)acetic acid with the di-n-bubyltin oxide in1∶1molar *** complex has been characterized by elemental analysis,IR and *** crystal structure of it has been determined by X-ray single crystal *** the results showed that the crystal belongs to triclinic system with space group P1and some crystal parameters:a=1.2202(9)nm,b=1.3158(10)nm,c=1.3804(10)nm,α=111.215(9)°,β=99.357(9)°,γ=96.075(10)°,V=2.006(2)nm 3,Z=1,F(000)=908,μ=1.489mm^(-1),D c=1.474g·cm^(-3),R_(1)=0.0375,wR_(2)=*** complex has a centrosymmetric dimer structure mode with a four-membered central endo-cyclic Sn_(2)O_(2)unit in which two bridged oxygen atoms both connect with an exo-cyclic tin atom which has a distorted *** of the endo-cyclic tin atoms exhibits a distorted trigonal bipyramid coordination geometry with an additional weak coordination carboxylate *** carboxylate ligands are divided into two *** two of them are bidentate and connecting to each of exo-cyclic tin atoms by using both oxygen atoms,whereas the others bridge to each pair of exo-and endo-cyclic tin atoms utilizing one oxygen atom ***:220513.

关键词： organotin complex (tetrahydropyrrodithiolocarbamoylthio)acetic acid systhesis crystal structure

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Synthesis and Physicochemical Properties of L-(+)-a-(Positive Butyl)-Leucine Ethyl Ester Chiral Ionic Liquids

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Journal of Wuhan University of Technology(Materials Science) 2018年第1期33卷 249-255页

作者：田甜胡小玲 GUAN Ping TANG Yimei WANG Hongli Department of Applied Chemistry School of Natural and Applied Science Northwestern Polytechnical University The Key Laboratory of Space Applied Physics and Chemistry Ministry of Education

L-（＋）-α-（positive butyl）-leucine ethyl ester bromide chiral ionic liquid was synthesized by using microwave-assisted synthesis method and L-（＋）-α-（positive butyl）-leucine ethyl ester terafluoroborate and hexafluorophosphate chiral ionic liquids were synthesized by the anion exchange reaction. The structures were characterized by IR, ~1HNMR and structure optimization calculation. The results of studies on physicochemical properties show that they possess better thermal stability, solubility, bio-solubility and high conductivity. They can serve as effective reaction media as well as chiral catalysts. They are presently being investigated as dispersion agents in molecular imprinting ployer.

关键词： L-(+)-a-(positive butyl)-leucine ethyl ester chiral ionic liquids systhesis characterization physicochemistry properties

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