Journal of the Chemical Society, Part 1The Society., 1962 "Titles of chemical papers in British and foreign journals" included in Quarterly journal, v. 1-12. |
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Page 252
... material ( 16 ) , and some cis - 1 - dimethyl ketal ( 18 ) . The cis - dimethyl ketal ( 18 ) was readily separated , but the cis - syn - dimethyl ketal ( 48 ) could not be freed completely from starting material ( 16 ) by fractional ...
... material ( 16 ) , and some cis - 1 - dimethyl ketal ( 18 ) . The cis - dimethyl ketal ( 18 ) was readily separated , but the cis - syn - dimethyl ketal ( 48 ) could not be freed completely from starting material ( 16 ) by fractional ...
Page 406
... material from this mixture were unsuccessful . The infrared spectrum of this material ( in CHC13 ) showed very strong absorption at 1070 ( Si - O - Si stretch ) 1113 , and 1422 cm . - 1 ( Si - Ph ) which strongly suggested a ...
... material from this mixture were unsuccessful . The infrared spectrum of this material ( in CHC13 ) showed very strong absorption at 1070 ( Si - O - Si stretch ) 1113 , and 1422 cm . - 1 ( Si - Ph ) which strongly suggested a ...
Page 596
... material of b . p . 66 ° / 3.5 mm . to 120 ° / 2.5 mm . was fractionated to give dimethyl trimethylsilylmethyl phosphate ( 2 · 1 g . , 7 % ) , b . p . 61-62 ° / 0.4 mm . , n , 20 1.4158 ( Found : C , 33.9 ; H , 8.3 . CH17OPSi requires C ...
... material of b . p . 66 ° / 3.5 mm . to 120 ° / 2.5 mm . was fractionated to give dimethyl trimethylsilylmethyl phosphate ( 2 · 1 g . , 7 % ) , b . p . 61-62 ° / 0.4 mm . , n , 20 1.4158 ( Found : C , 33.9 ; H , 8.3 . CH17OPSi requires C ...
Contents
NO PAGE | 1 |
NOTES | 62 |
The use of triethylamine in the preparation of NcarboxyLproline anhydride | 68 |
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absorption acetic acid acetone added afforded alcohol alkali Amax Amer amylose anhydride aqueous solution atom benzene bromide buffer Calc carbon carbonyl CH₂ Chem chloride chloroform chromatography coefficients colourless complexes compound concentration constant containing crystallisation crystals decomposition derivative dilute distilled double bond dried eluted ester ethanol ethyl acetate evaporated experimental filtrate formation formed Found fraction gave give H₂O heated hydrazine hydrochloric acid hydrogen hydrolysis hydroxyl infrared infrared spectrum intermediate isolated isomerisation k₁ ketal ketone light petroleum b. p. m. p. and mixed malononitrile methyl mixed m. p. mixture mole molecule needles nitrogen nucleophilic obtained oxidation phenyl polymer potassium potassium hydroxide precipitate prepared present ratio reaction reagent reduction reflux requires residue room temperature sample sodium ethoxide sodium hydroxide solid solvent spectra structure Table terpyridine triethylamine ultraviolet values washed yellow yield