The structure of acylamino derivatives of 1-(2,4,6-trichlorophenyl)-4,5- dihydropyrazol-5-one was studied by X-ray diffraction. 3-Acetylamino-1- (2,4,6-trichlorophenyl)-4,5-dihydropyrazol-5-one and 3-benz-oylamino-1-(2,4,6- ...

The electronic structure of C- and N-sulfenyl chlorides and bromides was studied by semiempirical quantum-chemical methods. The sulfur atom in sulfenyl chlorides always possesses a larger positive charge than the sulfur ...

Tautomerism and acid-base properties of 1-methyl-4H-pyrazol-5-one and its thio and seleno analogs were studied by the semiempirical quantum-chemical methods MNDO, AM1, and PM3. The CH form prevails in pyrazolone, whereas ...

Crystal and molecular structure of 1-phenyl-3-benzoylamino-4-benzoylpyrazol-2-in-5-one as a product of the benzoylation of 1-phenyl-3-benzoylaminopyrazol-2-in-5-one was characterised by X-ray single crystal diffraction. ...

The reactions of bromine and chlorine with bis(1-phenyl-5-tetrazolyl) disulfide and of bromine with 1-phenyltetrazole-5-thiol are reversible. Chlorine reacts with 1-phenyltetrazole-5-thiol to yield 1-phenyltetrazole-5-sulfenyl ...