Synthesis, Characterization and Crystal Structure of a Dinuclear Silver(I) Complex: [AgL(NO_3)]_2 (L= 2-Acetamido-5-methyl-1,3,4-thiadiazole)

The title complex [AgL（NO3）]2 1, where L = 2-acetamido-5-methyl-1,3,4-thiadiazole, was prepared from the reaction of 2-acetamido-5-methyl-1,3,4-thiadiazole with AgNO3 at room temperature and its structure has been determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P2t/c with a = 12.5454（8）, b = 11.9672（12）, c = 6.8925（6） A, β = 98.468（2）°. V= 1023.51（15） A^3, Mr= 3127.08, Dc = 2.123 g/cm^3, Z= 4, μ（MoKoσ） = 2.174 mm^-1, F（000） = 640, R = 0.0259 and wR = 0.0580 for 1787 observed reflections with I 〉 2σ（I）. Complex 1 self-assembls into a quasi-three-dimensional network consisting of adjacent dimers through intermolecular Ag...O weak interactions.

2-甲胺基-5-特丁基-1,3,4-噻二唑的合成工艺优化

[目的]探讨原料搅拌时间、回流反应时间、反应溶剂、脱水剂等因素对反应收率的影响,对合成工艺进行优化研究。[方法]以4-甲基氨基硫脲(MTSC)与特戊酰氯(PC)为原料在甲苯中反应,生成的中间体直接加入三氯氧磷(POCl_3)脱水成环得到2-甲胺基-5-特丁基-1,3,4-噻二唑。[结果]所得产品为白色晶体,气相色谱法测定其纯度为90.5%,收率为85.2%。采用UV、IR、HNMR表征了产物的分子结构。[结论]确定最佳的工艺条件为n(MTSC):n(PC):n(POCl_3)=1∶1∶0.67,甲苯为溶剂,先将MTSC与PC室温搅拌1 h,加入POCl_3后再回流反应3 h。