Composition, cured product, electronic device, tri(2, 2-bis((allyloxy) methyl)-1-butoxy)aluminum, and preparation method therefor

Disclosed is a composition that is characterized by comprising a compound (A) represented by the following general formula (1) and a polymerizable compound (B) provided with at least a cyclic ether structure, and by having a ratio (W A /W B ) of the comprised amount (W A ) of the aforementioned compound (A) to the comprised amount (W B ) of the aforementioned compound (B) in the range of 0.2 to 5. (1) (R 1 -O)nM (R 1 is an organic group. n is 2 or 3 and has the same valence as M. The plurality of R 1 present may be identical or may be different. M is a bivalent or trivalent atom.)