Title: Antimony Pentachloride
CAS Registry Number: 7647-18-9
Molecular Formula: Cl5Sb
Molecular Weight: 299.03
Percent Composition: Cl 59.28%, Sb 40.72%
Line Formula: SbCl5
Literature References: Usually prepd by passing chlorine into molten antimony trichloride. Laboratory procedure: Schenk in Handbook of Preparative Inorganic Chemistry Vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1963) p 610.
Properties: Colorless to yellow, oily liquid. Fumes in air. Cannot be distilled at atmospheric pressures without complete decompn. d416 2.358; d436 2.319; d452 2.289; d478 2.231. mp 3.5°. bp14 68°; bp22 79°; bp30 92°; bp55 85°; bp68 102.5°. Dipole moment: 1.14 at 16.3° in CCl4. Mono- and tetrahydrates are formed in the presence of small amounts of water. Large amounts of water cause hydrolysis to Sb2O5. Sol in hydrochloric acid, chloroform, carbon tetrachloride.
Melting point: mp 3.5°
Boiling point: bp14 68°; bp22 79°; bp30 92°; bp55 85°; bp68 102.5°
Density: d416 2.358; d436 2.319; d452 2.289; d478 2.231
Use: As catalyst when replacing a fluorine substituent with chlorine in organic compounds.