Synthesis and Crystal Structure of a New Coordination Polymer: {[AgL]ClO_4}_n(L = 2,5-Bis(3-pyridinylmethylthio)-l,3,4-thiadiazole)

The title complex {[AgL]ClO4}n(L=2,5-bis(3-pyridinylmethylthio)-1,3,4-thiadiazole) was synthesized by the reaction of Ag(I) salt and a novel flexible ligand L.Its structure was determined by X-ray crystallography with the following data:monoclinic,space group P21/n,a=16.5068(13),b=7.6548(4),c=16.5521(13),β=115.119(3)o,V=1893.7(2)3,Z=4,Dc=1.893 g/cm3,μ=1.565 mm-1,F(000)=1072,C14H12AgClN4O4S3,Mr=539.78,T=293(2) K,S=1.067,the final R=0.0342 and wR=0.0870.The silver ion in the complex is in a trigonal coordin...     

醋酸钯和苯胂酸协同催化苯甲腈水合制备苯甲酰胺

以醋酸钯和苯胂酸(物质的量之比nPd∶nAs=3∶2)作为协同催化剂,用于催化苯甲腈水合制备苯甲酰胺。在不额外添加有机溶剂条件下,利用过量苯甲腈兼做溶剂,该反应获得了99%的高产率和100%的苯甲酰胺选择性以及高达186 mol·kg-1·h-1的时空收率,循环反应5轮未发现明显的活性与选择性的降低,催化剂具有良好的循环使用性能。产物的结晶分离研究结果表明苯甲酰胺在0℃的析出百分比为73%,简单过滤即可收集。