✍ Scribed by Davey, W. ;Gwilt, J. R.
No coin nor oath required. For personal study only.
Existing methods for the determination of certain products, individually or in simple mixtures, are reviewed, and a comprehensive scheme of analysis is described for the mono‐nitration products of benzaldehyde.
📜 SIMILAR VOLUMES
Nitration of 1-methylpyrene yields a mixture of isomers which have been M c u l t to resolve by chromatography. By using the addition of substituent effects, the products have been identified by 'HNMR as 3-, 6and &nitro derivatives of 1-methylpyrene in the proportions 0.65:l:l.
Thin-layer chromatographic separations are shown of all major oxidation products from various steps OF the continuous TNT nitration process and of nitration compounds resulting from impurities'in the toluene used for nitration. This technique has been, used to correlate the formation of the various
## Abstract ^13^C and ^1^H nuclear magnetic resonance (NMR) spectra have been obtained in order to identify the six nitration products of pyrene—1‐nitropyrene, 1,3‐dinitropyrene, 1,6‐dinitropyrene, 1,8‐dinitropyrene, 1,3,6‐trinitropyrene and 1,3,6,8‐tetranitropyrene. ^13^C chemical shifts in DMSO‐_
## Abstract Methods are given for the determination of the four main classes of carbohydrate in wheat flour, viz., starch, pentosan, sugars and cellulosic material. The sum of the individual classes so found agrees closely with the figures obtained as ‘carbohydrate by difference’.