Electro-optic film, compound, electro-optic composition, and electro-optic element

A compound represented by the following formula (5):

• [in formula (5), X5 represents a bicyclic to tetracyclic divalent condensed ring group having two or more thiophene rings, and the divalent condensed ring group may have a substituent;
• R51 and R52 each independently represent an alkyl group, a haloalkyl group, an acyloxyalkyl group, a trialkylsilyloxyalkyl group, an aryldialkylsilyloxyalkyl group, an alkyldiarylsilyloxyalkyl group, an aryl group, —R71—OH (R71 represents a divalent hydrocarbon group), —R72—NH2 (R72 represents a divalent hydrocarbon group), —R73—SH (R73 represents a divalent hydrocarbon group), or —R74—NCO (R74 represents a divalent hydrocarbon group), these groups may each have a crosslinkable group, and R51 and R52 may be bonded to each other to form a ring together with atoms to which R51 and R52 are bonded;
• R53 represents an alkyl group or an aryl group, these groups may each have a crosslinkable group, when there is a plurality of R53s, R53s may be the same as or different from each other, and R53 may be bonded to R51 or R52 to form a ring together with atoms to which R53 and R51 or R52 are bonded;
• k5 represents an integer of 0 to 4;
• A5 represents any one of groups represented by the following formulas (a51), (a52), and (b51):
• R54, R55, R56, R57, R58, and R59 each independently represent a hydrogen atom, a halogen atom, an alkyl group, a haloalkyl group, a cyano group, an aryl group, or a haloaryl group;
• E51 and E52 each independently represent —C(R60)(R61)—, —C(O)—, —O—, or —NR62—, note that at least one of E51 and E52 is —O— or —NR62—, R60 and R61 each independently represent a hydrogen atom, an alkyl group, a haloalkyl group, an aryl group, or a haloaryl group, and R62 represents a hydrogen atom or an alkyl group;
• when A5 is a group represented by formula (a51) or (a52), m5 is 0;
• and
• when A5 is a group represented by formula (b51), m5 and n5 each independently represent 0 or 1, and note that m5+n5=1].