The composition for optical materials of the present invention contains at least
one compound represented by the following Formula 1:
##STR1##
wherein R1, R2 and R3 are each independently
C1-C10 hydrocarbyl or hydrogen; X1, X2 and
X3 are each independently S, Se or Te; Y1, Y2 and
Y3 are each independently —Sa—[(CH2)bS]cH,
a is an integer from 0 to 2, b is an integer from 0 to 4, and c is an integer from
0 to 2, and a compound reactive to the compound of Formula 1. A resin produced
by curing a composition containing the compound of Formula 1 by polymerization
has a high refractive index, and suitable as various optical materials.
