Properties: Light reddish-brown plates or needles with golden lustre from ethyl acetate, mp 212° (McGookin). Also reported as brownish-yellow plates from toluene, mp 206-207° (Dutt). Sol in ether, chloroform, benzene, ethyl acetate; sparingly sol in cold alc, acetic acid. Practically insol in water.
Melting point: mp 212° (McGookin); mp 206-207° (Dutt)
Derivative Type: 5,7-Dimethyl ether
Percent Composition: C 70.57%, H 5.92%, O 23.50%
Properties: Yellow crystals from ethyl acetate + acetone or chloroform + methanol, dec 245-246°. Sol in chloroform, pyridine, hot glacial acetic acid; slightly sol in cold methanol, ethyl acetate, acetone, benzene, ether.
Derivative Type: Pentamethyl ether
Percent Composition: C 71.65%, H 6.53%, O 21.82%
Properties: Crystals from petr ether, methanol or 90% alcohol, mp 144°. Very sol in acetone, glacial acetic acid, benzene, ethyl acetate.
Melting point: mp 144°
Derivative Type: Pentaacetate
Percent Composition: C 66.11%, H 5.27%, O 28.62%
Properties: Leaflets from benzene + alcohol or acetone + alcohol, prisms from ethyl acetate, mp 212°.
Melting point: mp 212°
Derivative Type: Tetrahydrorottlerin
Percent Composition: C 69.22%, H 6.20%, O 24.59%
Properties: Yellow prisms from alcohol, mp 214°.
Melting point: mp 214°
产品链接: 82-08-6››