Abstract
Unlike 1-indanone, 7-hydroxy-1-indanone does not enter the base-catalyzed condensation reaction with 1H-pyrrole-2-carbaldehyde but, instead, gives the salt, potassium 3-oxo-2,3-dihydro-1H-inden-4-olate dihydrate. X-ray analysis, NMR, IR, UV spectroscopy, DFT and MP2 calculations allowed to prove the chelate structure of the salt and to estimate the effect of chelation on the spectral properties as well as to explain the specific reactivity.
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