Studies in the chemistry of diaryls

Loh, Shiu May


Loh, Shiu May (1955) Studies in the chemistry of diaryls.

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The thesis is divided into three sections: (I) The thermal decomposition of some "diazoperbromides". The bis-diazoperbromide derived from 2-nitrobenzidinedecomposes in hot glacial acetic acid to give 2:4:4'-tribromo-and 4:4'-dibromo-2-nitrodiphenyl, The tribromo-compound appears to be formed by an intramolecular mechanism.(II) The unsuccessful attempts of preparing both 4:5-dimethyl-and 4:5:9-trimethyl-phenanthridine could be due to the steric effects of the methyl groups in the blocking positions. 2-Amino-6:6'-ditolyl (+)-camphor-10-sulphonate showed mutarotation and yielded an inactive base on decomposition. Attempts were made to resolve 6-(methylphenyl)-phenyl-6 '-methyl-2-trimethylammonium iodide, but., in each case an inactive iodide was obtained after decomposition of the active salt. (Ill) 5: 5'-Dilsoquinolyl (+ )-camphor-10-sulphonate could not be resolved, neither did it mutarotate; although its (+)-tartrate showed mutarotation in one occasion, there was no confirmed evidence of mutarotation of the tartrate; but comparison with similar salt of inactive base (2:2'-dipyridyl) gave an Indication that the base might be capable of optical activity.

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This version's date is: 1955
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Item TypeThesis (Doctoral)
TitleStudies in the chemistry of diaryls
AuthorsLoh, Shiu May
Uncontrolled KeywordsOrganic Chemistry; Pure Sciences; Chemistry; Diaryls; Diaryls; Studies



Deposited by () on 31-Jan-2017 in Royal Holloway Research Online.Last modified on 31-Jan-2017


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