PhCH2)3Sn·(O2CC5H4N)·(H2O)]n was synthesized by the reaction of 4-pyridine car-boxylic acid with the tribenzyltin o xide and was characterized by IR,1 H NMR and MS.Its crystal structure was determined by X-r...PhCH2)3Sn·(O2CC5H4N)·(H2O)]n was synthesized by the reaction of 4-pyridine car-boxylic acid with the tribenzyltin o xide and was characterized by IR,1 H NMR and MS.Its crystal structure was determined by X-ray single crystal diffraction.The crystal belongs to monoclinic.The space group P21 /c with unit cell parameters a=1.2241(8)nm,b=0.9660(6)nm,c=2.3708(15)nm,β=102.722(12)°,V=2.734(3)nm3,Z =4,Dc=1.298g·cm-3 .In crystal,the tin atom rendered five-coordinate in a trigo nal bipyramidal structure which is b ridged by 4-pyridine carboxy-late into one-dimensional chain polymers.展开更多
以硫脲和氯乙酸为原料,在无溶剂和350 W微波辐射4 m in条件下,缩合生成中间体2,4-噻唑烷二酮(Ⅰ)产率91.5%;随后在无溶剂和400 W微波辐射5 m in条件下,通过V ilsm e ier甲酰化反应,生成中间体4-氯-5-甲酰基噻唑-2(3H)-酮(Ⅱ),产率86.7%...以硫脲和氯乙酸为原料,在无溶剂和350 W微波辐射4 m in条件下,缩合生成中间体2,4-噻唑烷二酮(Ⅰ)产率91.5%;随后在无溶剂和400 W微波辐射5 m in条件下,通过V ilsm e ier甲酰化反应,生成中间体4-氯-5-甲酰基噻唑-2(3H)-酮(Ⅱ),产率86.7%;最后以正丙醇为溶剂,450 W微波辐射7 m in条件下,成环得到5-氨基-噻唑[4,5-d]嘧啶-2(3H)-酮(Ⅲ),产率80.5%。反应总产率为63.9%。合成产物与中间体的结构经1HNMR,MS和元素分析确认。展开更多
键指数归一-二次指数势(Unity Bond Index-Quadratic Exponential Potential,UBI-QEP)法被用于研究肼在Fe,Ru,Pt和Cu表面上的分解机理.研究结果表明,肼在金属上优先发生N—N键断裂,金属活性顺序是Ru^Fe>Pt>Cu,但不同金属上呈现出...键指数归一-二次指数势(Unity Bond Index-Quadratic Exponential Potential,UBI-QEP)法被用于研究肼在Fe,Ru,Pt和Cu表面上的分解机理.研究结果表明,肼在金属上优先发生N—N键断裂,金属活性顺序是Ru^Fe>Pt>Cu,但不同金属上呈现出不同的产物选择性.在Fe,Ru上产物主要为N2和H2,其通过N2Hx物种形成的可能性较低,金属活性顺序为Ru>Fe;而在Cu,Pt上最终产物为NH3,N2和H2,其中H2和N2的形成可能部分源于中间体物种N2H的转化,金属的活性顺序为Pt>Cu.展开更多
文摘PhCH2)3Sn·(O2CC5H4N)·(H2O)]n was synthesized by the reaction of 4-pyridine car-boxylic acid with the tribenzyltin o xide and was characterized by IR,1 H NMR and MS.Its crystal structure was determined by X-ray single crystal diffraction.The crystal belongs to monoclinic.The space group P21 /c with unit cell parameters a=1.2241(8)nm,b=0.9660(6)nm,c=2.3708(15)nm,β=102.722(12)°,V=2.734(3)nm3,Z =4,Dc=1.298g·cm-3 .In crystal,the tin atom rendered five-coordinate in a trigo nal bipyramidal structure which is b ridged by 4-pyridine carboxy-late into one-dimensional chain polymers.
文摘以硫脲和氯乙酸为原料,在无溶剂和350 W微波辐射4 m in条件下,缩合生成中间体2,4-噻唑烷二酮(Ⅰ)产率91.5%;随后在无溶剂和400 W微波辐射5 m in条件下,通过V ilsm e ier甲酰化反应,生成中间体4-氯-5-甲酰基噻唑-2(3H)-酮(Ⅱ),产率86.7%;最后以正丙醇为溶剂,450 W微波辐射7 m in条件下,成环得到5-氨基-噻唑[4,5-d]嘧啶-2(3H)-酮(Ⅲ),产率80.5%。反应总产率为63.9%。合成产物与中间体的结构经1HNMR,MS和元素分析确认。
文摘键指数归一-二次指数势(Unity Bond Index-Quadratic Exponential Potential,UBI-QEP)法被用于研究肼在Fe,Ru,Pt和Cu表面上的分解机理.研究结果表明,肼在金属上优先发生N—N键断裂,金属活性顺序是Ru^Fe>Pt>Cu,但不同金属上呈现出不同的产物选择性.在Fe,Ru上产物主要为N2和H2,其通过N2Hx物种形成的可能性较低,金属活性顺序为Ru>Fe;而在Cu,Pt上最终产物为NH3,N2和H2,其中H2和N2的形成可能部分源于中间体物种N2H的转化,金属的活性顺序为Pt>Cu.
