Chemistry:Titanocene dicarbonyl
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| Names | |
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| IUPAC name
dicarbonylbis(η5-cyclopentadienyl)titanium(II)
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| Other names
Dicarbonyldi-π-cyclopentadienyltitanium
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| Identifiers | |
3D model (JSmol)
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PubChem CID
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| Properties | |
| C12H10O2Ti | |
| Molar mass | 234.09 g/mol |
| Appearance | maroon solid pyrophoric |
| Melting point | 90 °C (194 °F; 363 K) |
| Boiling point | Sublimes at 40 to 80 °C (104 to 176 °F; 313 to 353 K) at 0.001 mmHg |
| insoluble | |
| Solubility in other solvents | THF, benzene |
| Structure | |
| tetrahedral | |
| Hazards | |
| Main hazards | flammable |
| Related compounds | |
Related compounds
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Cp2TiCl2 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is   ?)
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| Infobox references | |
Dicarbonylbis(cyclopentadienyl)titanium is the chemical compound with the formula (η5-C5H5)2Ti(CO)2, abbreviated Cp2Ti(CO)2. This maroon-coloured, air-sensitive species is soluble in aliphatic and aromatic solvents.[1] It has been used for the deoxygenation of sulfoxides, reductive coupling of aromatic aldehydes and reduction of aldehydes.
Structure and synthesis
Cp2Ti(CO)2 is prepared by the reduction of titanocene dichloride with magnesium as a slurry in THT under an atmosphere of carbon monoxide.[2]
- (C5H5)2TiCl2 + Mg + 2 CO → (C5H5)2Ti(CO)2 + MgCl2
Both Cp2Ti(CO)2 and Cp2TiCl2 are tetrahedral as are related zirconium and hafnium compounds. Of historical interest, the complex was first prepared by the reduction of titanocene dichloride with sodium cyclopentadienyl under an atmosphere of carbon monoxide.[3]
Its structure has been confirmed by X-ray crystallography.[4]
References
- ↑ Sikora, D. J.; Moriarty, K. J.; Rausch, M. D. (1990). Reagents for Transition Metal complex and Organometallic syntheses. Inorganic Syntheses. 28. pp. 250–251. doi:10.1002/9780470132593.ch64.
- ↑ Snead, Thomas E. (2001). "Dicarbonylbis(cyclopentadienyl)titanium". Encyclopedia of Reagents for Organic Synthesis. John Wiley & Sons, Ltd. doi:10.1002/047084289X.rd073. ISBN 0471936235.
- ↑ Murray, James G. (1959). "A Metal Carbonyl Compound of Titanium". Journal of the American Chemical Society 81 (3): 752–753. doi:10.1021/ja01512a062.
- ↑ Atwood, Jerry L.; Stone, Karen E.; Alt, Helmut G.; Hrncir, Duane C.; Rausch, Marvin D. (1975). "Crystal and Molecular Structure of Titanocene Dicarbonyl, (η5-C5H5)2Ti(CO)2". Journal of Organometallic Chemistry 96: C4–C6. doi:10.1016/S0022-328X(00)86431-1.
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