Paper
Unusual crystal structure of N-substituted maleamic acid - very strong effect of intramolecular hydrogen bonds.
Published Dec 1, 2014 · Raju Francis, P. Raghavaiah, Kuruvilla Pius
Acta crystallographica Section B, Structural science, crystal engineering and materials
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Abstract
N-Carbamylmaleamic acid (malur) undergoes cyclodehydration under favourable conditions, as expected, to give N-carbamyl maleimide. N-(Carboxymethyl) maleamic acid (malgly), however, does not undergo a similar cyclization reaction. Strong π bonding between the C and N of the amide group as well as two intramolecular hydrogen bonds makes malgly a planar molecule, as revealed by single-crystal X-ray studies.
N-(Carboxymethyl) maleamic acid (malgly) has a unique crystal structure due to strong intramolecular hydrogen bonds, making it a planar molecule with no cyclization reaction.
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