π-Conjugative effect of the cyclopropyl group on the chelate ring of β-diketone at the ground and excited states has been investigated by means of the spectroscopic methods. The spectral data of enolic β-diketones substituted with cyclopropyl group have been compared with those of the corresponding isopropyl substituted β-diketones. The chemical shift of− CH= proton of the chelate ring has been observed at lower magnetic field by the ...
