Титаноцен дихлорид

Описание

Titanocene dichloride is an organotitanium compound with the chemical formula (η5-C5H5)2TiCl2, often written as Cp2TiCl2, which is a common reagent in organometallic chemistry and organic synthesis. Cp2TiCl2 does not form a "sandwich" structure like ferrocene, but a tetrahedral structure due to its four ligands around a metal center. Because of its anti-tumor activity, it has been used in clinical trials as a chemotherapeutic agent.

Химические свойства

Titanocene dichloride is a reddish-orange crystalline solid. Moderately soluble in toluene, chloroform, alcohol, and other hydroxylic solvents; sparingly soluble in water, petroleum ether, benzene, ether, carbon disulfide, and carbon tetrachloride. Stable in dry air, slowly hydrolyzed in moist air. Titanocene dichloride is irritating to the skin and mucous membranes.

Использование

Titanocene dichloride is used as an experimental cancer chemotherapeutic agent. It is used as a research chemical, as a catalyst in Ziegler–Natta polymerization reactions, and as an implant material in orthopedics, oral surgery, and neurosurgery.This metallocene is a common reagent in organometallic and organic synthesis. Titanocene dichloride is used to prepare titanocene pentasulfide. Used as an anticancer drug.

Методы производства

Titanocene dichloride is produced by the reaction of titanium tetrachloride with cyclopentadienyl sodium.

Общее описание

Titanocene dichloride appears as red to red-orange crystals. (NTP, 1992)

Реакции воздуха и воды

Stable in dry air. Decomposes in moist air and in water to form HCl .

Профиль реактивности

Titanocene dichloride is incompatible with strong oxidizers. Titanocene dichloride may decompose on exposure to water. .

Опасность

Toxic by inhalation, irritant to skin and mucous membranes.

Пожароопасность

Flash point data for Titanocene dichloride are not available; however, Titanocene dichloride is probably combustible.

Профиль безопасности

Poison by intravenous and intraperitoneal routes. Questionable carcinogen with experimental neoplastigenic, tumorigenic, and teratogenic data. Mutation data reported. See also TITANIUM COMPOUNDS. When heated to decomposition it emits toxic fumes of Cl-

Методы очистки

It forms bright red crystals from toluene or xylene/CHCl3 (1:1) and sublimes at 190o/2mm. It is moderately soluble in EtOH and insoluble in Et2O, *C6H6, CS2, CCl4, pet ether and H2O. The crystalline dipicrate explodes on melting at 139-140o. [Wilkinson et al. J Am Chem Soc 75 1011 1953, IR: Wilkinson & Birmingham J Am Chem Soc 76 4281 1954, NMR and X-ray: Glivicky & McCowan Can J Chem 51 2609 1973, Clearfield et al. J Am Chem Soc 53 1622 1975, Beilstein 16 IV 1769.]