Molybdenum dichloride dioxide
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3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.157.480 |
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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.
Structure
[edit]Gaseous molybdenum dichloride dioxide is a monomer,[1] but upon condensation, it polymerizes to give a coordination polymer of uncertain structure.
Preparation
[edit]The compound is most easily prepared by treatment molybdenum trioxide with concentrated hydrochloric acid:[2]
- MoO3 + 2 HCl → MoO2Cl2 + H2O
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:[4]
- MoO2 + Cl2 → MoO2Cl2
It is also prepared by chlorination of molybdenum trixoide:[5]
- MoO3 + Cl2 → MoO2Cl2
Reactions
[edit]Many bisadducts are known of the type MoO2Cl2(ether)2. These octahedral molecular complexes are soluble in organic solvents.
With bulky anilines, it converts to the diimido complex 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]
Related compounds
[edit]Molybdenum difluoride dioxide exists as a sublimable white solid, in contrast to the dichloride.
References
[edit]- ^ Ward, Brian G.; Stafford, Fred E. (1968). "Synthesis and Structure of Four- and Five-Coordinated Gaseous Oxohalides of Molybdenum(VI) and Tungsten(VI)". Inorganic Chemistry. 7 (12): 2569–2573. doi:10.1021/ic50070a020.
- ^ Francisco J. Arnaiz (1997). "Dichlorodioxobis(Dimethylsulphoxide)-Molybdenum(VI)". Dichlorodioxobis(Dimethylsulphoxide) Molybdenum(VI). Inorganic Syntheses. Vol. 31. pp. 246–7. doi:10.1002/9780470132623.ch39. ISBN 978-0-470-13262-3.
- ^ Gibson, V. C.; Kee, T. P.; Shaw, A. (1988). "New, improved synthesis of the group 6 oxyhalides, W(O)Cl4, W(O)2Cl2 and Mo(O)2Cl2". Polyhedron. 7 (7): 579–80. doi:10.1016/S0277-5387(00)86336-6.
- ^ a b Schrock, R. R.; Murdzek, J. S.; Bazan, G. C.; Robbins, J.; DiMare, M.; O'Regan, M. (1990). "Synthesis of molybdenum imido alkylidene complexes and some Reactions Involving Acyclic Olefins". Journal of the American Chemical Society. 112 (10): 3875–3886. Bibcode:1990JAChS.112.3875S. doi:10.1021/ja00166a023.
- ^ Takahashi, Hideyuki (14 January 2021). "Method of producing high bulk density molybdenum oxychloride".