eta-Tocopherol

Title: h-Tocopherol
CAS Registry Number: 91-86-1
CAS Name: 3,4-Dihydro-2,7-dimethyl-2-(4,8,12-trimethyltridecyl)-2H-1-benzopyran-6-ol
Additional Names: 2,7-dimethyl-2-(4,8,12-trimethyltridecyl)-6-chromanol; 7-methyltocol
Molecular Formula: C27H46O2
Molecular Weight: 402.65
Percent Composition: C 80.54%, H 11.52%, O 7.95%
Literature References: Isolation from rice: Green, Marcinkiewicz, Nature 177, 86 (1956). Synthesis: McHale et al., J. Chem. Soc. 1958, 1600; Green et al., ibid. 1959, 3374; Marcinkiewicz et al., ibid. 3377.
Properties: Pale yellow oil. uv max (ethanol): 298 nm (E1%1cm 104.1).
Absorption maximum: uv max (ethanol): 298 nm (E1%1cm 104.1)
Derivative Type: 4-Phenylazobenzoate
Molecular Formula: C40H54N2O3
Molecular Weight: 610.87
Percent Composition: C 78.65%, H 8.91%, N 4.59%, O 7.86%
Properties: Crystals from 2-propanol, mp 55-56°.
Melting point: mp 55-56°
Derivative Type: 3¢,5¢-Dinitrophenylurethane
Molecular Formula: C34H49N3O7
Molecular Weight: 611.77
Percent Composition: C 66.75%, H 8.07%, N 6.87%, O 18.31%
Properties: Crystals from ethanol + water, mp 115-117°.
Melting point: mp 115-117°
Derivative Type: p-Nitrophenylurethane
Molecular Formula: C34H50N2O5
Molecular Weight: 566.77
Percent Composition: C 72.05%, H 8.89%, N 4.94%, O 14.11%
Properties: Crystals from methanol, mp 112°.
Melting point: mp 112°
Status: This monograph has been retired and is no longer subject to revision or update.
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