采用尿素和N,N-二甲基-1,3-丙二胺在常压下加热反应合成了1,3-双[3-(二甲胺基)丙基]脲(DPU),考察了反应温度、反应时间对DPU产率和粘度的影响,将不同条件下合成的DPU与二氯乙醚反应生成二氨基脲聚合物(PUB),并与PUB对照品进行比较。研...采用尿素和N,N-二甲基-1,3-丙二胺在常压下加热反应合成了1,3-双[3-(二甲胺基)丙基]脲(DPU),考察了反应温度、反应时间对DPU产率和粘度的影响,将不同条件下合成的DPU与二氯乙醚反应生成二氨基脲聚合物(PUB),并与PUB对照品进行比较。研究表明,在反应温度140℃,反应时间6 h条件下合成的DPU产率为91.8%,粘度290 c P。此条件下合成的DPU与二氯乙醚反应生成的PUB的色泽和粘度与对照品最接近。展开更多
Four geometric mer-isomers in the [Co(2,3-tri)(cmen)Cl]2+ system have been synthesized and well separated (2,3-tri = N-(3-aminoethyl)-1,3-propanediamine; cmen = 1,2-di- aminopropane). Their structures in DMSO-d6 solut...Four geometric mer-isomers in the [Co(2,3-tri)(cmen)Cl]2+ system have been synthesized and well separated (2,3-tri = N-(3-aminoethyl)-1,3-propanediamine; cmen = 1,2-di- aminopropane). Their structures in DMSO-d6 solution have been uniquely assigned by using 2D- NMR techniques (gCOSY and NOESY).展开更多
文摘采用尿素和N,N-二甲基-1,3-丙二胺在常压下加热反应合成了1,3-双[3-(二甲胺基)丙基]脲(DPU),考察了反应温度、反应时间对DPU产率和粘度的影响,将不同条件下合成的DPU与二氯乙醚反应生成二氨基脲聚合物(PUB),并与PUB对照品进行比较。研究表明,在反应温度140℃,反应时间6 h条件下合成的DPU产率为91.8%,粘度290 c P。此条件下合成的DPU与二氯乙醚反应生成的PUB的色泽和粘度与对照品最接近。
文摘Four geometric mer-isomers in the [Co(2,3-tri)(cmen)Cl]2+ system have been synthesized and well separated (2,3-tri = N-(3-aminoethyl)-1,3-propanediamine; cmen = 1,2-di- aminopropane). Their structures in DMSO-d6 solution have been uniquely assigned by using 2D- NMR techniques (gCOSY and NOESY).