60435

Potassium tert-pentoxide solution

technical, ~25% in toluene (T, ~1.7 M)

• Synonym(s): Potassium (2-methyl-2-butoxide), Potassium tert-pentylate
• Linear Formula: CH₃CH₂C(CH₃)₂OK
• CAS Number: 41233-93-6
• Molecular Weight: 126.24
• Beilstein: 4149025
• MDL number: MFCD00064808
• UNSPSC Code: 12352001
• PubChem Substance ID: 57651765
• NACRES: NA.22

Properties

• grade: technical
• concentration: ~25% in toluene (T, ~1.7 M)
• density: 0.90 g/mL at 20 °C
• SMILES string: [K+].CCC(C)(C)[O-]
• InChI: 1S/C5H11O.K/c1-4-5(2,3)6;/h4H2,1-3H3;/q-1;+1
• InChI key: ZRLVQFQTCMUIRM-UHFFFAOYSA-N

Description

Application

Potassium tert-pentoxide solution has been used as a base to synthesize [RuClPh(CO)(H₂IMes)(PCy₃)] from second-generation Grubbs metathesis catalyst, [RuCl₂(=CHPh)(H₂IMes)(PCy₃)], (where H₂IMes is 1,3-dimethyl-4,5-dihydroimidazol-2-ylidene and PCy₃ is tricyclohexylphosphine) and benzyl alcohol. This complex is a solid, air-stable and highly active isomerization catalyst.

Caution

may crystallize; can be redissolved on heating to approx. 30°C

Safety Information

• Pictograms: GHS02,GHS08,GHS05,GHS07
• Signal Word: Danger
• Hazard Statements: H225,H304,H314,H336,H361d,H373,H412
• Precautionary Statements: P210 - P280 - P301 + P310 - P301 + P330 + P331 - P303 + P361 + P353 - P305 + P351 + P338 + P310
• Hazard Classifications: Aquatic Chronic 3 - Asp. Tox. 1 - Eye Dam. 1 - Flam. Liq. 2 - Repr. 2 - Skin Corr. 1B - STOT RE 2 - STOT SE 3
• Target Organs: Central nervous system
• Supplementary Hazards: EUH014
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 3
• Flash Point(F): 39.2 °F
• Flash Point(C): 4 °C
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves