Benz-syn-aldoximes

For a time, considerable attention was focussed on stereoisomeric changes about the C=N double bond in substituted benz-syn-aldoximes, e.g., the partial isomerization of methyl ethers of m-and p-nitrobenz-spn-aldoximes and the complete conversion of the a-O-p-nitrobenzyl ethers of o-, m-, and p-aldoximes.26 In the case of the semicarbazones, the isomeric changes can be attributed to tautomerism in the urea portion of the molecule without the necessity of considering stereisom-erism about the double bonds in other portions of the molecule.266,310... 

Benzaldehydeoxime (called Benzaldoxim in Ger), C H7NO, mw 121.13, N 11.56%. It exists in two configurations a-or benz-anti-aldoxime and /3- or benz-syn-aldoxime. Both forms are described in Beil 7,218,221,(121) [167,169]... 

The prefix is placed immediately before the name of the group concerned, i.e., syn-aldoxime means that the aldehyde hydrogen atom is syn to the hydroxyl group and anti-aldoodme, that the aldehyde group is anti to the hydroxyl group. If the prefixes referred to the benzene group the names would be reversed and benz-syn-aldoxime would be anti-benzaldoxime and benz-anti-aldoxime would be syn-benzal-doxime. These last names, however, are not used. 

Qran-benz-syn-aldoxim-ace(at 10, 672, /3-Ozo-a-ozimino. -p.tolyi-pTopiona iiTe-nitrU 10, 816, U 568. 

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