The Spirit of Organic Chemistry An Introduction to the Current Literature of Th
The Spirit of Organic Chemistry An Introduction to the Current Literature of Th
Arthur Lachman
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Chem. (2), 44, 313 ; 45, 1, 377 (1891). Cf. Hantzsch, Ber. D. Chem. Gesell. 25, 1692 (1892). 5 Ber. D. Chem. Gesell. 23, 2325, 2776 (1890). 6 l. C. 23, 2163 (1890). 186 THE SPIRIT OF ORGANIC CHEMISTRY identical, stereomeric O -methyl esters. The stereo- isomerism of oxime derivatives is the best possible proof of the validity of a spatial hypothesis. A word as to the nomenclature 1 of the isomeric oximes. Hantzsch distinguishes them by the pre- fixes " Syn " and " Anti " ; the choice is determi...ned by the following rules: The prefix indicates the proximity of the radical attached to nitrogen (OH in this case) to that one of the other radicals which follows immediately after the prefix. E. G. : C 6 H 5 C - C 6 H 4 . CH 8 C 6 H 6 - C - C 6 H 4 . CH 3 HO-N N-OH Syn-phenyltolylketoxime Anti-phenyltolylketoxime or or Anti-tolylphenylketoxime Syn-tolylphenylketoxime If one of the other radicals is capable of reacting with the group attached to nitrogen, as e. G. In the aldoximes hydroxyl and hydrogen are split off in the shape of water, the prefix is so chosen that the syllable "syn " distinguishes that one of the isomeres containing said reacting groups in closer proximity : C 6 H 5 -C-H C 6 H 5 -C-H II II N-OH HO-N Benzsynaldoxime Benzantialdoxime The nomenclature of the dioximes is similar.
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