Molybdenum dichloride dioxide
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3D model (JSmol)
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CompTox Dashboard (EPA)
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| Properties | |
| MoO2Cl2 | |
| Molar mass | 198.85 g·mol−1 |
| Appearance | yellow or cream solid |
| Melting point | 175 °C (347 °F; 448 K) |
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| H314 | |
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Related compounds
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Molybdenum dichloride dioxide is the inorganic compound with the formula MoO2Cl2. It is a yellow diamagnetic solid that is used as a precursor to other molybdenum compounds. Molybdenum dichloride dioxide is one of several oxychlorides of molybdenum.[1]
Structure
[edit | edit source]Gaseous molybdenum dichloride dioxide is a monomer,[2] but upon condensation, it polymerizes to give a coordination polymer of uncertain structure.
Preparation
[edit | edit source]MoO2Cl2 can also be prepared from MoOCl4:[3]
- MoOCl4 + O(Si(CH3)3)2 → MoO2Cl2 + 2 ClSi(CH3)3
It is also prepared by chlorination of molybdenum dioxide and molybdenum trioxide:[4][5]
- MoO2 + Cl2 → MoO2Cl2
- MoO3 + Cl2 → MoO2Cl2 [more detail needed]
Reactions
[edit | edit source]Many bisadducts are known of the type MoO2Cl2(ether)2. These octahedral molecular complexes are soluble in organic solvents. The adduct with dimethylsulfoxide can be readily prepared by treatment molybdenum trioxide with concentrated hydrochloric acid:[6]
- MoO3 + 2 HCl + 2 L → MoO2Cl2L2 + H2O
When treated with bulky anilines, MoO2Cl2 converts to diimido complexes, one of which is MoCl2(=N−Ar)2(dimethoxyethane). This complex is the precursor to the Schrock carbenes of the type Mo(OR)2(=N−Ar)(=CH−tBu).[4]
References
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