| abstract |
A novel compound for obtaining a transparent resin having a high refractive index is provided. A metal thietane compound represented by the following general formula (120): (In the general formula (120) below, M is one selected from the group consisting of Bi, Sb, Ti, Zr and Ta, X 1 and X 2 are each independently a sulfur atom or an oxygen atom, and R 1 is a divalent group. The bond between MT represented by a dotted line and a solid line represents a single bond or a double bond, m is an integer of 0 or 1 or more, n is a valence of M, and p is 1 or more and n. When r = 1, q = 0, Y is a monovalent inorganic or organic group, and when r = 1 and npq is 2 or more, a plurality of Ys are each independently A monovalent inorganic or organic group, when r = 1 and npq is 2 or more, a plurality of Y may be bonded to each other to form a ring containing M. When r = 2, npq = 1 or 2, Y is a divalent group, and when r = 2 and npq = 2, two Ys form a ring together with two Ms. For good .r = 2 and q = 2, the plurality of T are each independently an inorganic or organic group.) [Selection figure] None |