Polymetalloxane, composition, cured film, member, electronic component, fiber, binder for ceramic molding, cured film production method, and fiber production method

A polymetalloxane comprising a constituent unit represented by the following general formula (1):

• wherein,
• R1 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms;
• R2 and R3 are each independently a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, an alicyclic alkyl group having 5 to 12 carbon atoms, an aromatic group having 6 to 30 carbon atoms, or an acyl group having 1 to 12 carbon atoms;
• R2 and R3 are optionally linked together via a carbon-carbon saturated or a carbon-carbon unsaturated bond to form a ring structure;
• a is an integer of 0 or 1;
• M represents a metal atom selected from the group consisting of Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ru, Rh, Pd, Ag, In, Sn, Sb, Hf, Ta, W, Re, Os, Ir, Pt, Au, TI, and Bi;
• m is an integer indicating the valence of the metal atom M;
• and
• b is an integer of 1 to (m−2).