| 摘要 |
PROBLEM TO BE SOLVED: To provide a new compound which has a high refractive index and can give practically usable optical products. SOLUTION: This episulfide compound represented by general formula (1) [A is silicon, titanium, germanium, zirconium, tin, or lead; R is H, a 1 to 6C alkyl or a 1 to 6C alkylthio group; B is a thioglycidylthio group represented by structural formula (2); (k) is 1 or 2; (l) is an integer of 1 to 3; (m) is an integer of 0 to 3; (n) is the integer of 0 to 3]. COPYRIGHT: (C)2004,JPO
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