Thietane compound, polymerizable composition comprising the compound, and use of the composition

Abstract

Disclosed is a thietane compound represented by the following general formula (1), (wherein, in the above general formula (1), M represents an element belonging to Group 14 of the Periodic Table in the long form; X 1 s each independently represent a sulfur atom or an oxygen atom; p represents an integer of equal to or more than 2 and equal to or less than (n−1); and n represents the number of valence of a metal atom M, provided that when n−p is 1, R 2 represents an alkyl group having a straight chain or a branched chain of equal to or more than 1 and equal to or less than 3 carbon atoms which may have a substituent; and when n−p is 2 or more, a plurality of R 2 s each independently represent an alkyl group having a straight chain or a branched chain of equal to or more than 1 and equal to or less than 3 carbon atoms which may have a substituent or a plurality of R 2 s may be bonded to each other to form a ring containing M in which the alkyl chain forming the ring has equal to or more than 1 and equal to or less than 3 carbon atoms and a portion constituting the ring does not contain a sulfur atom).

1 . A thietane compound represented by the following general formula (1), 
       
         
           
           
               
               
           
         
         (wherein, in the above general formula (1), M represents an element belonging to Group 14 of the Periodic Table in the long form; X 1 s each independently represent a sulfur atom or an oxygen atom; p represents an integer of equal to or more than 2 and equal to or less than (n−1); and n represents the number of valence of a metal atom M, provided that when n−p is 1, R 2  represents an alkyl group having a straight chain or a branched chain of equal to or more than 1 and equal to or less than 3 carbon atoms which may have a substituent; and when n−p is 2 or more, a plurality of R 2 s each independently represent an alkyl group having a straight chain or a branched chain of equal to or more than 1 and equal to or less than 3 carbon atoms which may have a substituent or a plurality of R 2 s may be bonded to each other to form a ring containing M in which the alkyl chain forming the ring has equal to or more than 1 and equal to or less than 3 carbon atoms and a portion constituting the ring does not contain a sulfur atom). 
       
     
     
         2 . The thietane compound as set forth in  claim 1 , wherein, in said general formula (1), X 1  is a sulfur atom. 
     
     
         3 . The thietane compound as set forth in  claim 2 , wherein said M is a Sn atom. 
     
     
         4 . The thietane compound as set forth in  claim 3 , wherein R 2  is a methyl group or a methylene group. 
     
     
         5 . A polymerizable composition comprising the thietane compound as set forth in  claim 1 . 
     
     
         6 . Use of the polymerizable composition as set forth in  claim 5  as an optical component. 
     
     
         7 . Use of a resin obtained by polymerizing the polymerizable composition as set forth in  claim 5  as an optical component.