How to write IUPAC name for this imine compound?enter image description here


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You have correctly identified the compound as an imine, which is characterized by the double bond between a carbon atom and a nitrogen atom.

According to the current version of Nomenclature of Organic Chemistry – IUPAC Recommendations and Preferred Names 2013 (Blue Book), imines are named using the suffix ‘imine’ (in absence of characteristic groups having seniority over imines).

P- All imines are named substitutively using the suffix ‘imine’; the presence of several ‘imine’ characteristic groups is denoted by the numerical multiplying prefixes ‘di’, ‘tri’, etc. When there is a choice for numbering, the methodology described in P- for amines is recommended to generate preferred IUPAC names

The cross reference to P- concerns the choice between two or more parent structures in complex polyamines, which is not relevant in this case.

Thus, the parent structure of the given compound is simply methanimine. The corresponding name for the N-substituted imine is N-phenylmethanimine. Further substitution at the carbon atom yields the complete name N,1-diphenylmethanimine.


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