Properties: Plates from hot benzene + methanol, mp 206-206.5°. [a]D18 -36.3° (c = 3.8 in ethanol). uv max (ethanol): 223, 272, 304.5 nm (e 11300; 6350; 5100). Sol in ethanol, methanol, dioxane, acetone, pyridine, concd H2SO4; moderately sol in acetic acid, ether; sparingly sol in benzene, petr ether, chloroform, water. Gives yellow solns with aq ammonia, sodium carbonate, and sodium hydroxide. Alkaline solns darken rapidly in air, eventually becoming purple.
Melting point: mp 206-206.5°
Optical Rotation: [a]D18 -36.3° (c = 3.8 in ethanol)
Absorption maximum: uv max (ethanol): 223, 272, 304.5 nm (e 11300; 6350; 5100)
Derivative Type: Dibenzoate
Percent Composition: C 71.99%, H 5.64%, O 22.37%
Properties: Needles from benzene + petr ether, mp 133-134°. [a]D18 -10.8° (c = 1.9 in chloroform). uv max (ethanol): 236 nm (e 36700).
Melting point: mp 133-134°
Optical Rotation: [a]D18 -10.8° (c = 1.9 in chloroform)
Absorption maximum: uv max (ethanol): 236 nm (e 36700)
Derivative Type: O,O-Dimethyl ether
Percent Composition: C 67.48%, H 7.55%, O 24.97%
Properties: Short rods from aq ethanol, mp 72°. [a]D18 -2.9° (c = 2.7 in chloroform). uv max (ethanol): 223, 267.5 nm (e 10500; 5100).
Melting point: mp 72°
Optical Rotation: [a]D18 -2.9° (c = 2.7 in chloroform)
Absorption maximum: uv max (ethanol): 223, 267.5 nm (e 10500; 5100)
产品链接: 10140-70-2››