Polymethylhydrosiloxane: Difference between revisions

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Revision as of 21:05, 5 January 2014 editSmokefoot (talk \| contribs)Autopatrolled, Extended confirmed users, Pending changes reviewers, Rollbackers74,728 edits eEROS cite per WP:SECONDARY, I think the CAS # is wrong← Previous edit		Revision as of 21:16, 5 January 2014 edit undoCheMoBot (talk \| contribs)Bots141,565 edits Updating {{chembox}} (changes to verified and watched fields - updated 'CASNo_Ref', 'Verifiedfields', 'Watchedfields') per Chem/Drugbox validation (report errors or bugs)Next edit →
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Revision as of 21:16, 5 January 2014

Polymethylhydrosiloxane
Names

Other names Methyl hydrogen siloxane; Poly(methyl siloxane); Poly(methylhydrosiloxane); Polysilicone 4
Identifiers
CAS Number	63148-57-2
Abbreviations	PMHS
ChemSpider	NA
ECHA InfoCard	100.119.568
CompTox Dashboard (EPA)	DTXSID8047501
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). N verify (what is ?) Infobox references

Chemical compound

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

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