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| Names | |
|---|---|
| Other names Methyl hydrogen siloxane; Poly(methyl siloxane); Poly(methylhydrosiloxane); Polysilicone 4 | |
| Identifiers | |
| CAS Number | |
| Abbreviations | PMHS |
| ChemSpider | |
| ECHA InfoCard | 100.119.568 
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| CompTox Dashboard (EPA) | |
| Properties | |
| Chemical formula | (CH3(H)SiO)n |
| Molar mass | variable |
| Density | 1.06 g/cm |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
 Y verify (what is ?)
Infobox references
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Polymethylhydrosiloxane (PMHS) is a polymer with the general structure -(CH3(H)Si-O)-. It is used in organic chemistry as a mild and stable reducing agent easily transferring hydrides to metal centers. A variety of related materials are available under the following CAS registry numbers 16066-09-4, 63148-57-2, 178873-19-3, and 63148-57-2. These include the tetramer ((MeSiHO)4), copolymers of poly(dimethysiloxane and poly(methylhydrosiloxane), and trimethylsilyl terminated materials.
This material is prepared by the hydrolysis of methyldichlorosilane:
- n MeSiHCl2 + n H2O → (MeSiH)n + 2n HCl
References
- J. M. Lavis, R. E. Maleczka, Jr. "Polymethylhydrosiloxane" Encyclopedia of Reagents for Organic Synthesis 2003, John Wiley & Sons. doi:10.1002/047084289X.rn00062
See also
- Polydimethylsiloxane (PDMS)
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