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Merck
CN

336556

Bis(triphenylsilyl) chromate

96%

Synonym(s):

Bis(triphenylsilyl) ester chromic acid

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About This Item

Linear Formula:
[(C6H5)3SiO]2CrO2
CAS Number:
1624-02-8
Molecular Weight:
634.79
NACRES:
NA.22
PubChem Substance ID:
24860393
UNSPSC Code:
12352002
EC Number:
216-612-8
MDL number:
MFCD01736354
Assay:
96%

Key Documents

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InChI key

AQLZCGLPNYEIDH-UHFFFAOYSA-N

InChI

1S/2C18H15OSi.Cr.2O/c2*19-20(16-10-4-1-5-11-16,17-12-6-2-7-13-17)18-14-8-3-9-15-18;;;/h2*1-15H;;;/q2*-1;+2;;

SMILES string

O=[Cr](=O)(O[Si](c1ccccc1)(c2ccccc2)c3ccccc3)O[Si](c4ccccc4)(c5ccccc5)c6ccccc6

assay

96%

reaction suitability

reagent type: oxidant

mp

159 °C (dec.) (lit.)

Application

Bis(triphenylsilyl) chromate [(Ph3SiO)2] can be used as a catalyst:
  • For ethylene polymerization.
  • For the conversion of secondary benzylic and allylic trimethylsilyl ethers to ketones by oxidation reaction using tert-butyl hydroperoxide.

It can also be used to prepare supported catalysts with silica gel or montmorillonite K-10. These catalysts can be used in the oxidation of alcohols to corresponding carbonyl compounds.
Reactant for the XPS and XRD characterization of chromium-silica catalysts

Silyl chromate catalyst for
  • Olefin polymerization and ethylene polymerization
  • Benzylic oxidations used as a phase transfer catalyst

signalword

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - Skin Sens. 1

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

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Certificates of Analysis (COA)

Lot/Batch Number
09224AB

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Oxidation of Alcohols by Silica Gel-Supported Bis (Trimethylsilyl) Chromate Under Microwave Irradiation Without Solvent
Heravi MM, et al.
Synthetic Communications, 29(2), 163-166 (1999)
Bis (triphenylsilyl) chromate catalyzed oxidation of silyl ethers by tert-butyl hydroperoxide
Muzart J and Ajjou A
Synlett, 1991(07), 497-498 (1991)
Ethylene polymerization with supported bis (triphenylsilyl) chromate catalysts
Carrick WL, et al.
Journal of Polymer Science Part A: Polymer Chemistry, 10(9), 2609-2620 (1972)
Oxidation of alcohols by montmorillonite K-10 supported bis (trimethylsilyl) chromate
Heravi MM, et al.
Monatshefte fur Chemie / Chemical Monthly, 129(12), 1305-1308 (1998)

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