Compound containing mesogenic group, and mixture, composition, and optically anisotropic body using said compound

A compound comprising a group selected from the group consisting of an acryloyl group and a methacryloyl group;

• and a mesogenic group,
• wherein a content of a silicon compound in the compound is 1 ppm % by weight or more to 1,000 ppm % by weight or less, and
• the compound is represented by general formula (1);
• P-(Sp)m-MG-R1 (1)
• wherein in the general formula (1) P represents a polymerizable functional group,
• Sp represents an alkylene group having 0 to 18 carbon atoms, wherein the alkylene group may be substituted with one or more halogen atoms or CN, and one CH2 group or two or more CH2 groups not adjacent to each other, which are present in the alkylene group, each independently may be substituted with —O—, —S—, —NH—, —N(CH3)—, —CO—, —COO—, —OCO—, —OCOO—, —SCO—, —COS—, or —C≡C— as long as oxygen atoms are not directly bonded to each other,
• m represents 1,
• MG represents the mesogenic group represented by General Formula (1 -b);
• -Z0-(A1-Z1)n-A2-Z2-A3-Z3- (1-b);
• in the general formula (1-b), A1, A2, and A3 each independently represent a 1,4-phenylene group, a 1,4-cyclohexylene group, a 1,4-cyclohexenyl group, a tetrahydropyran-2,5-diyl group, a 1,3-dioxane-2,5-diylgroup, a tetrahydrothiopyran-2,5-diyl group, a 1,4-bicyclo(2,2,2)octylene group, a decahydronaphthalene-2,6-diyl group, a pyridine-2,5-diyl group, a pyrimidine-2,5-diyl group, a pyrazine-2,5-diyl group, a thiophene-2,5-diyl group-, a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, a 2,6-naphthylene group, a phenanthrene-2,7-diyl group, a 9,10-dihydrophenanthrene-2,7-diyl group, a 1,2,3,4,4a,9,10a-octahydrophenanthrene-2,7-diylgroup, a 1,4-naphthylene group, a benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl group, a benzo[1,2-b:4,5-b′]diselenophene-2,6-diyl group, a [1]benzothieno[3,2-b]thiophene-2,7-diyl group, a [1]benzoselenopheno[3,2-b]selenophene-2,7-diyl group, or a fluorene-2,7-diyl group, and may have, as a substituent, one or more F's, Cl's, CF3's, OCF3's, CN groups, alkyl groups having 1 to 8 carbon atoms, alkoxy groups, alkanoyl groups, alkanoyloxy groups, alkenyl groups having 2 to 8 carbon atoms, alkenyloxy groups, alkenoyl groups, alkenoyloxy groups, or General Formula (1-c):
• AnSpmP (1-c)
• wherein in the general formula (1-c), P represents a reactive functional group, A represents —O—, —COO—, —OCO—, —OCH2—, —CH2O—, —CH2CH2OCO—, —COOCH2CH2—, —OCOCH2CH2—, or a single bond, Sp represents a spacer group having 0 to 18 carbon atoms, n represents 0 or 1, and m represents 0 or 1,
• in the general formula (1-b), Z0, Z1, Z2, and Z3 each independently represent —COO—, —OCO—, —CH2CH2—, —OCH2—, —CH2O—, —CH═CH—, —C≡C—, —CH═CHCOO—, —CF═CF—, —CF2O—, —OCOCH═CH—, —CH2CH2COO—, —CH2CH2OCO—, —COOCH2CH2—, —CONH—, —NHCO—, an alkyl group which may have a halogen atom having 2 to 10 carbon atoms, or a single bond, and
• n represents 0, or 1, and
• in the general formula (1) R1 represents general formula (1-a);
• -(Sp)m-P (1 -a)
• in the general formula (1-a) P represents a reactive functional group, Sp represents a spacer group having 1 to 18 carbon atoms, and m represents 1,
• wherein the polymerizable functional group P of general formula (1), the reactive functional group P of general formula (1-c) and the reactive functional group P of general formula (1-a) are each independently selected from a group consisting of an acryloyl group and a methacryloyl group.