Treatment of resorcin[4]arene tetracarboxylic acid 1 with triethylamine in the presence of Co(CH3COO)2·4H2O and 4,4'-bipyridine gave a co-crystallizati
A binicotinic biscarbohydrazone compound,2,2'-bipyridyl-3,3'-bis(N,N'-disali- cylidene)-formyhydrazone,1 has been prepared and characterized by elem
Mg-Al spinel is synthesized by using industrial waste-residue and basic magnesium carbonate in the aluminum factory as the main raw materials. The influence of