British Abstracts: Pure chemistry and physiology. ser. A1943 |
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... Boiling conc . HCl - AcOH hydrolyses ( IX ) or ( X ) , without inversion , to ( I ) ; aq . 20 % NaOH also hydrolyses ( IX ) to ( I ) . Boil- ing NaOMe - MeOH followed by a little H2O partly inverts and then hydrolyses ( IX ) , yielding ...
... Boiling conc . HCl - AcOH hydrolyses ( IX ) or ( X ) , without inversion , to ( I ) ; aq . 20 % NaOH also hydrolyses ( IX ) to ( I ) . Boil- ing NaOMe - MeOH followed by a little H2O partly inverts and then hydrolyses ( IX ) , yielding ...
Trang 127
... boiling AcOH to tetracene [ 2 : 3 - benzanthracene ] ( II ) , m.p. 357 ° ( vac . ) . ( I ) is best deprived of a yellow colour , due to ( II ) , by heating with a little ( CH CO ) , O in boiling xylene . The absorption spectrum of ( I ) ...
... boiling AcOH to tetracene [ 2 : 3 - benzanthracene ] ( II ) , m.p. 357 ° ( vac . ) . ( I ) is best deprived of a yellow colour , due to ( II ) , by heating with a little ( CH CO ) , O in boiling xylene . The absorption spectrum of ( I ) ...
Trang 193
... boiling NH2Ph , K2CO ,, and Cu powder into 5 : 2 : 4 : 1 - NO , CH ( NHPh ) , CO , H and [ CH ( NO , ( NHPh ) • CO , H- 4 : 5 : 2 ] . ( I ) and boiling 2N - NaOH or MeOH - KÖH at 50 ° yield 2 - bromo - 5 - nitro - 4 - hydroxy- , m.p. ...
... boiling NH2Ph , K2CO ,, and Cu powder into 5 : 2 : 4 : 1 - NO , CH ( NHPh ) , CO , H and [ CH ( NO , ( NHPh ) • CO , H- 4 : 5 : 2 ] . ( I ) and boiling 2N - NaOH or MeOH - KÖH at 50 ° yield 2 - bromo - 5 - nitro - 4 - hydroxy- , m.p. ...
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absorption absorption spectra Acad acetate acid AcOH activity adsorption alkali Amer Anal analysis ation atoms boiling calc catalyst cellulose CHCI Chem chemical chloride CHPh CO₂ CO₂H coeff colour compounds Compt conc concn const containing converted corr cryst crystals curves decomp decreases derivatives described determined diazotised dioxan discussed effect electrolytes electron energy equilibrium ester ether EtOH formation formed Geol gives H₂ H₂O H₂SO heat hydrochloride hydrogen hydrolysed increases ionisation ions isomerised ketone lattice liquid measurements MeOH metal method methyl minerals mixtures NaOH obtained oxidation oxidised oxime particles phenols PhOH Physical Rev picrate polarisation polymerisation pptd pptn prep presence pressure reaction reagent reduced rend room temp salts semicarbazone solubility solution solvent spectra spectrum structure substances surface theory thermal titration vals vapour X-ray yield