【Abstract】 Based on the synthesis of 2,2′-bisindan-1,1′,3,3′-tetrone(1),5,5′-dimethyl-2,2′-bisindan-1,1′,3,3′-tetrone(2) was obtained.This paper described the synthetic process and confirmed the characteristic of compound 2 by elemental analysis,1H NMR,FTIR and MS,then discussed a possible existing form.Compound 2 maily existed as en-ol form and had H-bonds in the molecule.At the same time,the ESR value of compound 2 was given as g=2.0042,could form stable radical.更多还原