Compound [Co 3(BTC)(HBTC)(H 2BTC)(C 2H 4O 2) 3]·3(DMF)·6(H 3O) was synthesized under mild conditions and its crystal structure was determined by using single crystal X-ray diffraction. The crystal structure ...Compound [Co 3(BTC)(HBTC)(H 2BTC)(C 2H 4O 2) 3]·3(DMF)·6(H 3O) was synthesized under mild conditions and its crystal structure was determined by using single crystal X-ray diffraction. The crystal structure was solved by direct method and refined by full-matrix least-square method. The crystal is monoclinic and belongs to space group Cc with a=2.645 3(5) nm, b= 1.670 4(3) nm, c=1\^821 6(4) nm, β=128.16(3) °, V=6.329(2) nm 3, Z=2 , D c=20.200 Mg/m 3, M r= 1 314.744, μ=10.274 mm -1, F(000) =38 226, GOF=0.99, R=0.094 1, ωR=0.257 3.展开更多
A new compound 2 6[Co(H 2O) 2(VO) 8(OH) 4(PO 4) 8] has been hydrothermally synthesized. Single crystal X-ray analysis indicates that this compound crystallizes in a monoclinic system, space group P2 1/n with a=1.438 5...A new compound 2 6[Co(H 2O) 2(VO) 8(OH) 4(PO 4) 8] has been hydrothermally synthesized. Single crystal X-ray analysis indicates that this compound crystallizes in a monoclinic system, space group P2 1/n with a=1.438 5(3) nm, b=1.012 2(2) nm, c=1.832 5(4) nm, β=90.21°, V=2\^668 2(9) nm 3, Z=2, D c=2.112 g/cm 3, R=0.055, wR=0.149 7, S=1.037. The structure of 2 6[Co(H 2O) 2(VO) 8(OH) 4(PO 4) 8] is characterized by P-V-O layers constructed by [(VO) 4(OH) 2(PO 4) 4] 6- non-symmetric units. The P-V-O layers are pillared by [Co(H 2O) 2] 2+ group, resulting in the channels within which the protonated diaminoethane and H 3O + are located.展开更多
采用溶胶-凝胶法制备H3PW6Mo6O40/SiO2催化剂,以苯甲醛,乙酰乙酸乙酯和尿素为原料,无水乙醇为溶剂催化合成4-苯基-6-甲基-5-乙氧羰基-3,4-二氢嘧啶-2(H)-酮,研究结果表明:反应物的摩尔比、反应温度、催化剂用量和反应时间是影响4-苯基-6...采用溶胶-凝胶法制备H3PW6Mo6O40/SiO2催化剂,以苯甲醛,乙酰乙酸乙酯和尿素为原料,无水乙醇为溶剂催化合成4-苯基-6-甲基-5-乙氧羰基-3,4-二氢嘧啶-2(H)-酮,研究结果表明:反应物的摩尔比、反应温度、催化剂用量和反应时间是影响4-苯基-6-甲基-5-乙氧羰基-3,4-二氢嘧啶-2(H)-酮合成收率的重要因素.当n(苯甲醛)∶n(乙酰乙酸乙酯)∶n(尿素)=1.0∶1.2∶1.5,反应温度为90℃,催化剂的用量占反应物料总质量的1.5%,反应时间为75min时,产品收率可达70.3%.通过熔点、IR、1 H NMR和MS对合成目标化合物进行了表征确认.展开更多
文摘Compound [Co 3(BTC)(HBTC)(H 2BTC)(C 2H 4O 2) 3]·3(DMF)·6(H 3O) was synthesized under mild conditions and its crystal structure was determined by using single crystal X-ray diffraction. The crystal structure was solved by direct method and refined by full-matrix least-square method. The crystal is monoclinic and belongs to space group Cc with a=2.645 3(5) nm, b= 1.670 4(3) nm, c=1\^821 6(4) nm, β=128.16(3) °, V=6.329(2) nm 3, Z=2 , D c=20.200 Mg/m 3, M r= 1 314.744, μ=10.274 mm -1, F(000) =38 226, GOF=0.99, R=0.094 1, ωR=0.257 3.
文摘A new compound 2 6[Co(H 2O) 2(VO) 8(OH) 4(PO 4) 8] has been hydrothermally synthesized. Single crystal X-ray analysis indicates that this compound crystallizes in a monoclinic system, space group P2 1/n with a=1.438 5(3) nm, b=1.012 2(2) nm, c=1.832 5(4) nm, β=90.21°, V=2\^668 2(9) nm 3, Z=2, D c=2.112 g/cm 3, R=0.055, wR=0.149 7, S=1.037. The structure of 2 6[Co(H 2O) 2(VO) 8(OH) 4(PO 4) 8] is characterized by P-V-O layers constructed by [(VO) 4(OH) 2(PO 4) 4] 6- non-symmetric units. The P-V-O layers are pillared by [Co(H 2O) 2] 2+ group, resulting in the channels within which the protonated diaminoethane and H 3O + are located.
文摘采用溶胶-凝胶法制备H3PW6Mo6O40/SiO2催化剂,以苯甲醛,乙酰乙酸乙酯和尿素为原料,无水乙醇为溶剂催化合成4-苯基-6-甲基-5-乙氧羰基-3,4-二氢嘧啶-2(H)-酮,研究结果表明:反应物的摩尔比、反应温度、催化剂用量和反应时间是影响4-苯基-6-甲基-5-乙氧羰基-3,4-二氢嘧啶-2(H)-酮合成收率的重要因素.当n(苯甲醛)∶n(乙酰乙酸乙酯)∶n(尿素)=1.0∶1.2∶1.5,反应温度为90℃,催化剂的用量占反应物料总质量的1.5%,反应时间为75min时,产品收率可达70.3%.通过熔点、IR、1 H NMR和MS对合成目标化合物进行了表征确认.
