Titlebook: ;

Tinea-Capitis

說(shuō)不出

Chalcogenocarboxylic Acids,g selenium and tellurium – has only blossomed over the last decade. Monochalcogenocarboxylic acids exist as fast tautomeric equilibrium mixtures of chalcogenol and chalcogenoxo forms. The chalcogenol form is the predominant species in solid state and nonpolar solvents. In contrast, in polar solvents