beta-Irone

Title: b-Irone
CAS Registry Number: 79-70-9
CAS Name: 4-(2,5,6,6-Tetramethyl-1-cyclohexen-1-yl)-3-buten-2-one
Molecular Formula: C14H22O
Molecular Weight: 206.32
Percent Composition: C 81.50%, H 10.75%, O 7.75%
Literature References: Frequent byproduct in synthesis of a-irone. Stereoselective synthesis of (±)-form: S. Torii et al., J. Org. Chem. 45, 16 (1980). For general refs see a-irone.
Properties: Oil with odor similar to that of b-ionone. bp0.1 85-90°; bp0.7 99-104°; bp11 125°. [a]D20 +59° (CH2Cl2). d421 0.9434; nD21 1.5178; nD25 1.5162. uv max: 295 nm (log e 4.05).
Boiling point: bp0.1 85-90°; bp0.7 99-104°; bp11 125°
Optical Rotation: [a]D20 +59° (CH2Cl2)
Index of refraction: nD21 1.5178; nD25 1.5162
Absorption maximum: uv max: 295 nm (log e 4.05)
Density: d421 0.9434
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