235032

Bis(trimethylsilyl) malonate

98%

• Synonym(s): Malonic acid bis(trimethylsilyl ester)
• Linear Formula: (CH₃)₃SiOCOCH₂COOSi(CH₃)₃
• CAS Number: 18457-04-0
• Molecular Weight: 248.42
• Beilstein: 2212115
• EC Number: 242-342-5
• MDL number: MFCD00009631
• UNSPSC Code: 12352100
• PubChem Substance ID: 24854074
• NACRES: NA.22

Properties

• Assay: 98%
• refractive index: n20/D 1.416 (lit.)
• bp: 63-66 °C/1 mmHg (lit.)
• density: 0.974 g/mL at 25 °C (lit.)
• SMILES string: C[Si](C)(C)OC(=O)CC(=O)O[Si](C)(C)C
• InChI: 1S/C9H20O4Si2/c1-14(2,3)12-8(10)7-9(11)13-15(4,5)6/h7H2,1-6H3
• InChI key: ATCKJLDGNXGLAO-UHFFFAOYSA-N

Description

General description

Bis(trimethylsilyl) malonate is precursor for metal-organic chemical vapor deposition (MOCVD) of HfO₂ and ZrO₂ thin films. It undergoes acylation reaction with acid chlorides and acyl carbonates in the presence of triethylamine and magnesium or lithium salts to give β-keto acids or methyl ketones.

Application

Bis(trimethylsilyl) malonate was used as cyclocondensation agent in cyclocondensation reactions. It was also used in the preparation of β-keto acids and methyl ketones.

Safety Information

• Pictograms: GHS02
• Signal Word: Warning
• Hazard Statements: H226
• Hazard Classifications: Flam. Liq. 3
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 3
• Flash Point(F): 75.2 °F - closed cup
• Flash Point(C): 24 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves