Journal of the Chemical Society, Part 3Chemical Society., 1949 |
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Results 1-3 of 89
Page 1760
... fraction I contained ca. 15 % of 2 3 4 - trimethyl D - xylose . Fraction II . The methoxyl value ( 52.3 % ) and the refractive index ( n ° 1 · 4468 ) indicated that this fraction was a mixture of trimethyl and dimethyl methylpentoside ...
... fraction I contained ca. 15 % of 2 3 4 - trimethyl D - xylose . Fraction II . The methoxyl value ( 52.3 % ) and the refractive index ( n ° 1 · 4468 ) indicated that this fraction was a mixture of trimethyl and dimethyl methylpentoside ...
Page 1765
... fraction A1 ( 0.61 g . ) , b . p . 160 ° / 12 mm . , n16 ° 1-4490 , fraction A , ( 2 · 34 g . ) , b . p . 130 ° / 0-2 mm . , 16 ° 1-4515 , and a still- residue ( 1.81 g . ) . The refractive index of fraction A , suggested that it ...
... fraction A1 ( 0.61 g . ) , b . p . 160 ° / 12 mm . , n16 ° 1-4490 , fraction A , ( 2 · 34 g . ) , b . p . 130 ° / 0-2 mm . , 16 ° 1-4515 , and a still- residue ( 1.81 g . ) . The refractive index of fraction A , suggested that it ...
Page 2155
... fractions H and J are assumed to have the same composition as fraction I. A portion of each fraction ( other than the very small groups , G , H , J , and K ) was hydrogenated at 100 ° in the presence of Raney nickel , after which the ...
... fractions H and J are assumed to have the same composition as fraction I. A portion of each fraction ( other than the very small groups , G , H , J , and K ) was hydrogenated at 100 ° in the presence of Raney nickel , after which the ...
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acetic acid acetic anhydride acetone acetyl added admixture alkaline alkyl aluminium chloride Amer ammonia aqueous solution atoms barium benzene boiling bromine Calc carbinol carbon catalyst Chem Chim chloroform colourless needles compound concentrated condensation cooled crystals cyclohexene decomp derivatives dilute dioxan dissolved distilled dithizone dried equiv ester ethanol ethyl acetate ethyl alcohol ethylene evaporated EXPERIMENTAL filtered filtrate formed Found fraction gave give heated under reflux hydrocarbon hydrochloric acid hydrogen chloride hydrolysis iodide ions isolated ketone Light absorption light petroleum b. p. method methyl mixed m. p. mixture molecule obtained oxide phenyl plates potassium hydroxide precipitated prepared pressure prisms pyridine Q-enzyme R₁ R₂ reaction reagent reduced removed requires residue room temperature salt semicarbazone separated sodium hydroxide solid soluble solvent specimen structure substance sulphate sulphone sulphuric acid synthesis Table unsaturated washed yield