Polymerizable compound as well as liquid crystal composition and liquid crystal display device each including polymerizable compound

A compound represented by a general formula (i):

• wherein
• Ri1 denotes a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or a halogenated alkyl group having 1 to 30 carbon atoms, —CH2— in the alkyl or halogenated alkyl group is optionally substituted with —CH═CH—, —C≡C—, —O—, —NH—, —COO—, —OCO—, or —OCOO—, but —O— is not adjacent to another —O—,
• Ri2 denotes a linear or branched alkyl group having 2 to 10 carbon atoms or a linear or branched halogenated alkyl group having 2 to 10 carbon atoms, —CH2— in the alkyl or halogenated alkyl group is optionally substituted with —CH═CH—, —O—, —COO—, or —OCO—, but —O— is not adjacent to another —O—,
• a ring A denotes a divalent aromatic group, a divalent alicyclic group, a divalent heterocyclic compound group, a divalent fused ring, or a divalent fused polycyclic ring, a hydrogen atom in these ring structures is optionally substituted with Li1, Li1 denotes a halogen atom, a cyano group, a nitro group, P-Sp-, a monovalent organic group having a group represented by a general formula Ki1, a linear or branched alkyl group having 1 to 10 carbon atoms, or a linear or branched halogenated alkyl group having 1 to 10 carbon atoms, —CH2— in the alkyl or halogenated alkyl group is optionally substituted with —CH═CH—, —C≡C—, —O—, —NH—, —COO—, —OCO—, or —OCOO—, but —O— is not adjacent to another —O—,
• a ring B denotes a phenyl group or a naphthyl group, a hydrogen atom in the ring structure is optionally substituted with Li2, Li2 denotes a halogen atom, P-Sp-, a monovalent organic group having a group represented by the general formula Ki1, a linear or branched alkyl group having 1 to 10 carbon atoms, or a linear or branched halogenated alkyl group having 1 to 10 carbon atoms, —CH2— in the alkyl or halogenated alkyl group is optionally substituted with —CH═CH—, —C≡C—, —O—, —COO—, or —OCO—, but —O— is not adjacent to another —O—,
• Zi1 denotes a single bond, —O—, —CH═CH—, —CF═CF—, —C≡C—, —COO—, —OCO—, —OCOO—, —CF2O—, —OCF2—, —CH═CHCOO—, —OCOCH═CH—, —CH═C(CH3)COO—, —OCOC(CH3)═CH—, —CH2—CH(CH3)COO—, —OCOCH(CH3)—CH2—, —OCH2CH2O—, or an alkylene group having 1 to 10 carbon atoms, and one —CH2— or two or more nonadjacent —CH2— groups in the alkylene group are optionally substituted with —O—, —COO—, or —OCO—,
• Zi3 denotes a single bond, —O—, —CH═CH—, —COO—, —OCO—, —OCOO—, —CH═CHCOO—, —OCOCH═CH—, —CH═C(CH3)COO—, —OCOC(CH3)═CH—, —CH2—CH(CH3)COO—, —OCOCH(CH3)—CH2—, or a linear or branched alkylene group having 1 to 20 carbon atoms, one —CH2— or two or more nonadjacent —CH2— groups in the alkylene group are optionally substituted with —O—, —COO—, or —OCO—,
• Ki1 denotes a group represented by one of general formulae (K-1) to (K-6),
• RK1 denotes a hydrogen atom or a linear or branched alkyl group having 1 to 6 carbon atoms, and TK1 independently denotes a group represented by one of general formulae (T-1) to (T-6),
• ST1 denotes a single bond, a linear or branched alkylene group having 1 to 15 carbon atoms, or a linear or branched alkenylene group having 2 to 18 carbon atoms, —CH2— in the alkylene or alkylene group is optionally substituted with —O—, —COO—, —C(═O)—, —C(═CH2)—, or —OCO— such that oxygen atoms are not directly adjacent to each other, RT1 denotes an alkyl group having 1 to 5 carbon atoms, —CH2— in the alkyl group is optionally substituted with —O—, —COO—, —C(═O)—, —C(═CH2)—, or —OCO— such that oxygen atoms are not directly adjacent to each other, and RT2 and RT3 independently denote a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and
• P denotes a polymerizable group, Sp denotes a spacer group or a single bond, m denotes an integer in the range of 1 to 4, a plurality of As, if present, may be the same or different, a plurality of Zi1s, if present, may be the same or different, a plurality of Ps, if present, may be the same or different, and a plurality of Sps, if present, may be the same or different.