Tungsten Hexacarbonyl CAS 14040-11-0

Carbonyl tungsten (molybdenum) complexes are important organometallic compounds. They are coordination compounds formed by transition metal tungsten (molybdenum) and carbon monoxide ligands. They are usually six ligands and are widely used in organic synthesis. For example, molybdenum hexacarbonyl can be used to catalyze ring opening polymerization of cycloolefins under light conditions; Carbonyl tungsten or carbonyl molybdenum complexes can react with olefins, fast hydrocarbons, diazomethanes, eyes, etc. to produce various organic molybdenum compounds; Simple substituted organomolybdenum compounds and complex binuclear complexes can be prepared by using the ligand of carbonyl tungsten or carbonyl molybdenum complexes for intermolecular replacement or exchange reactions.

Hexacarbonyl tungsten chemical formula W (CO) 6. Molecular weight 351.91. White crystal. Specific gravity 2.65. Sublimate at 60 ~ 70 ℃ in vacuum. It decomposes slightly under sunlight. It rapidly decomposes into tungsten and carbon monoxide at about 150 ℃. Insoluble in water, insoluble in ethanol, ether, benzene, and soluble in fuming nitric acid. It consists of tungsten hexachloride, aluminum powder and carbon monoxide (1.1 × 107 PA) heated to 100 ℃ in a pressure heater. As a catalyst, it can also be used for tungsten plating on metals or ceramics. Tungsten hexacarbonyl is a coordination compound, through which the first dihydrogen complex is obtained.

Tungsten hexacarbonyl is a colorless solid. Like the carbonyl complex hexacarbonyl chromium and hexacarbonyl molybdenum, it is volatile and stable in the air, in which tungsten atom has zero valence. The band position, intensity and spectral type of the vibrational spectrum of hexacarbonyl tungsten are closely related to the internal properties such as the chemical structure, spatial geometry, molecular force field and the distribution of electron cloud in the same molecule. Moreover, its spectral characteristics have a significant impact on the fluorescence properties of the prepared materials. Therefore, the study of its vibrational mode and vibrational spectrum is of great significance. Some studies have used the high symmetry of hexacarbonyl tungsten molecules and combined with the group theory method to analyze the vibration mode and spectral activity of hexacarbonyl tungsten molecules. Finally, the demol package based on density functional theory was used to calculate hexacarbonyl tungsten molecules, and 13 different vibration frequencies, molecular bond length, electron cloud distribution and other information were obtained.