| abstract |
The photochromic compound is represented by the following general formula (1):wherein, X denotes an oxygen atom or a nitrogen atom unsubstituted or substituted by a substituent selected from the following Y1 group:Y1 group: —R1, -A1(B1)l(A2)m(B2)nR2, -A3A4, -A5R3R1 denotes a cyano group or the like,R2 denotes an alkyl group or the like,Ra denotes a halogen atom or the like,A1, A2, A3, and A5 each independently denote an alkylene group or the like,A4 denotes a naphthyl group which may be substituted,B1 and B2 each independently denote any one of the divalent groups selected from the following group:l, m, and n are each independently 0 or 1, provided that n is 0 if m is 0,Y2 denotes a hydrogen atom or the like,R denotes a hydrogen atom or the like,denotes a norbornylidene group or the like. |