Fluorine-containing ether compound, fluorine-containing ether composition, coating liquid, article, method for producing article, and method for producing fluorine-containing compound

A fluorinated ether compound of formula (1A):

• [Rf—]a1Q1[-T]b1 (1A)
• wherein Rf is a monovalent group the bond terminal of which is constituted by a carbon atom, which comprises a first partial structure of formula (1) and a second partial structure of formula (2):
• —ORf12— (1)
• —ORf13— (2)
• wherein Rf12 is a C1-6 fluoroalkylene group, and
• Rf13 is a group having a fluorinated cyclic structure which may have a hetero atom,
• and wherein Rf comprises at least five first partial structures or comprises at least two second partial structures, and when there are two or more Rf, the two or more Rf may be the same or different,
• Q1 is a (a1+b1) valent linking group,
• T is —Rf6, —Ar, —OR10, —SR10, —NOR10, —C(═O)R10, —N(R10)2, —N+(R10)3X3, —C≡N, —C(═NR10)—R10, —N+≡N, —N═NR10, —C(═O)OR10, —C(═O)OX2, —C(═O)OX4, —C(═O)OC(═O)R10, —SO2R10, —SO3H, —SO3X2, —O—P(═O)(—OR10)2, —O—P(═O)(—OR10)(—OX2), —N═C═O, —Si(R)3-c(L)c, —C(R10)═C(R10)2, —C═C(R10), —C(═O)N(R10)2, —N(R10)C(═O)R10, —Si(R10)2—O—Si(R10)3, —NH—C(═O)R10, —C(═O)NHR10, —I, or a group containing
• Rf6 is a C1-6 fluoroalkyl group,
• R10 is a hydrogen atom, a C1-6 alkyl or fluoroalkyl group, or an aryl group which may have a substituent, and when there are two or more R10, the two or more R10 may be the same or different,
• Ar is an aryl group which may have a substituent,
• X2 is an alkali metal ion or an ammonium ion,
• X3 is a halide ion,
• X4 is a halogen atom,
• R is an alkyl group,
• L is a hydrolyzable group or a hydroxy group, and the two or more L in T may be the same or different,
• a1 is an integer of at least 1,
• b1 is an integer of at least 2, and
• c is 2 or 3,
• provided that the two or more T may be the same or different.