| abstract |
Compounds according to general formula (I) n n n n n n n n n n in which M is Ge or Sn, RAr is n n n n n n n n n n R 1 , R 2 , R 3 , R 4 , R 5 , independently of one another in each case, are —H, —F, —Cl, —OR 6 , —SR 6 , —N(R 6 ) 2 , —CF 3 , —CN, —NO 2 , —COOR 6 , —CONHR 6 , a branched, cyclic or preferably linear C 1-20 alkyl, C 2-20 alkenyl, C 1-20 alkyloxy or a C 2-20 alkenoxy radical, which can be interrupted one or more times by O, S or —NR 6 — and substituted by one or more polymerizable groups and/or radicals R 6 , R 6 is H, a branched, cyclic or preferably linear C 1-20 alkyl or C 2-20 alkenyl radical, R 7 is a chemical bond, an n-valent aromatic radical or a branched, cyclic or preferably linear C 1-20 alkylene radical, which can be interrupted one or more times by O, S or —NR 6 — and substituted by one or more polymerizable groups, ═O and/or radicals R 6 , n is 2 or 3 and m is 0 or 1. The compounds are particularly suitable as photoinitiators for radical polymerization and in particular for the production of dental materials. |