Chemical News and Journal of Industrial Science, Tomy 139-140Chemical news office., 1929 |
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Strona 96
... prepared by treating the N - alkylpyrazolan- thrones with a halogenating agent . The 2- chloro - N - methyl- and 2 - bromo - N - ethyl- pyrazolanthrones are described . is 2 - Mercapto - N - methylpyrazolanthrone prepared from the ...
... prepared by treating the N - alkylpyrazolan- thrones with a halogenating agent . The 2- chloro - N - methyl- and 2 - bromo - N - ethyl- pyrazolanthrones are described . is 2 - Mercapto - N - methylpyrazolanthrone prepared from the ...
Strona 258
... prepared by the method of Schlenk ( Annalen , 394 , 196- ) and had a melting point of 196.5-197 ° C . The carbinol was also prepared and melted at 162 ° C . Attempts were made to resolve the car- binol itself by combining it directly ...
... prepared by the method of Schlenk ( Annalen , 394 , 196- ) and had a melting point of 196.5-197 ° C . The carbinol was also prepared and melted at 162 ° C . Attempts were made to resolve the car- binol itself by combining it directly ...
Strona 306
... prepared as described was diluted to 800-850 ccs . and an excess of standard ferrous sulphate solu → tion was added . The excess ferrous iron was titrated with standard potassium perman- ganate and from these values the quantity of ...
... prepared as described was diluted to 800-850 ccs . and an excess of standard ferrous sulphate solu → tion was added . The excess ferrous iron was titrated with standard potassium perman- ganate and from these values the quantity of ...
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THE CHEMICAL NEWS | 18 |
Professor Leonard Hill on Right | 24 |
By DR W TOMBROCK | 129 |
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