Fulvenes and Thermochromic Ethylenes. Part 52 The Fine Structure of 2‐Arylmethylene‐1,3‐Indandiones; their NMR and Infrared Spectra

Abstract
A large number of 2‐arylmethylene‐1,3‐indandiones have been prepared and their nuclear magnetic resonance and infrared spectra have been measured. The measurements have been used to elucidate some details of the fine structure of these compounds.