Title: Benzenestibonic Acid
CAS Registry Number: 535-46-6
CAS Name: Dihydroxyphenylstibine oxide
Additional Names: phenylstibonic acid; phenylstibinic acid
Molecular Formula: C6H7O3Sb
Molecular Weight: 248.88
Percent Composition: C 28.96%, H 2.83%, O 19.29%, Sb 48.92%
Line Formula: C6H5SbO(OH)2
Literature References: Arylstibonic acids exist in the solid state as polymers of high mol wt, associated by H-bonds. The ions exist probably in the form [ArSb(OH)5]-. Benzenestibonic acid is prepd from benzenediazonium chloride and antimony trioxide in the presence of alkali: Schmidt, Ann. 421, 176, 188 (1920); DE 254421; Chem. Zentralbl. 1913, I, 345; Frdl. 11, 1084. From the double compd of benzenediazonium chloride and antimony trichloride by the action of alkali: May, J. Chem. Soc. 101, 1033 (1912); US 1260707.
Properties: Minute crystals from acetic acid, larger diamond-shaped, glistening crystals from alcohol-chloroform mixture on the addition of water. Not melted at 250°, dec at higher temps. Insol in water; slightly sol in alc; more sol in acetone, in alcohol + benzene, alcohol + ether, alcohol + chloroform; sol in warm chloroform or amyl acetate; freely sol in aq soln of sodium hydroxide, sodium carbonate, and ammonia.