Titanocenes and their use

Claim 1

A titanocene of the formula I ##STR14## in which the two radicals Rl independently of one another are cyclpentadienyl⊖, indenyl⊖, or 4,5,6,7-tetrahydroindenyl⊖ or said cyclopentadienyl, said indenyl or said 4,5,6,7-tetrahydroindenyl mono- or polysubstituted by C 1 --C 18 -alkyl, by C 1 --C 18 -alkoxy, by C 2 -C 18 -alkenyl, by C 5 -C 8 -cycloalkyl, by C 6 -C 16 -aryl, by C 7 -C 16 -arakyl, by cyano or by halogen, or the two radicals R 1 together are a radical of formula II ##STR15## in which X is (--CH 2 --) n where n is 1, 2 or 3, alkylidene of 2 to 12 carbon atoms, or said alkylidene substituted by phenyl, cycloalkylidene of 5 to 7 ring carbon atoms, SiR 2 4 or SnR 2 4 where R 4 is C 1 --C 12 -alkyl, C 5 -C 12 -cycloalkyl, C 6 -C 16 -aryl or C 7 -C 16 -aralkyl; or said radical of formula Ii monosubstituted or polysubstituted by C 1 --C 18 -alkyl, by C 1 --C 18 -alkoxy, by C 2 -C 18 -alkenyl, by C 5 -C 8 -cycloalkyl, by C 6 , C 16 -aryl, by C 7 -C 16 -aralkyl, by cyano or by halogen; R 2 is an 6-membered carbocyclic aromatic ring or a 5- or 6-membered heterocyclic aromatic ring which is substituted by fluorine atoms in at least one of the two ortho-positions relative to the metal-carbon bond, or R 2 and R 3 together are a radical of formula III Q--Y--Q--(III) in which Q is a carbocyclic aromatic ring, the two bonds in each case being in the ortho-position relative to the Y group, and the meta-position relative to the Y group in each case being substituted by a fluorine atom, or R 2 or Q is further substituted by alkyl or 1 to 18 carbon atoms, by alkoxy of 1 to 18 carbon atoms, by cycloalkyl of 5 to 6 ring carbon atoms, by aralkyl of 7 to 16 carbon atoms, by aryl of 6 to 16 carbon atoms, by hydroxyl, by carboxyl, by cyano, by halogen, by tertiary or quaternary amino, by alkoxycarbonyl of 1 to 18 carbon atoms in the alkoxy group, or by mono- or dialkylaminocarbonyl of 1 to 12 carbon atoms in the atoms alkyl group, Y is CH 2 , alkylidene of 2 to 12 carbon atoms, cycloalkylidene of 5 to 7 ring carbon atoms, a direct bond, NR 4 , O, S, SO, SO 2 , CO, SiR 4 2 or SnR 4 2 where R 4 is defined above, R 3 has the same meaning as R 2 , or R 3 is alkynyl of 2 to 6 carbon atoms, phenylethynyl or said phenylehtynyl substituted by halogen, by tertiary amino with 1 to 6 carbon atoms, by alkoxy of 1 to 6 carbon atoms, by carboxyl, by alkoxy or by cyano; N 3 , CN, SiR 3 4 or SnR 3 4 ; in which titanocenes R 2 contains at least one polyoxaalkylene radical of the formula (--C.sub.z H.sub.2z O).sub.o --R.sup.9 in which z is a number from 2 to 6, o is a number from 1 to 20 and R 9 is H or C 1 --C 18 -alkyl, wherein said polyoxaalkylene radical is attached to the aromatic radical R 2 or Q by a direct bond or through a bridging group which is --S--, --O--, --OSO 2 --, --CH-- 2 O--, --CH(CH 3 )--, --SO 2 --, --C(O)O-- ##STR16## --NR 10 --, NR 10 CH 2 CH 2 --NR 10 ----CH 2 CH 2 NR 10 --CH 2 NR 10 --, --CH(COO--) 2 , --CH 2 COO--, --CONR 10 --, --CH(CONR 10 --) 2 , ##STR17## --OC(O)O--, --N(R 10 )--COO--, --CH 2 N(R 10 )--COO--, --N(R 10 )--CONH--, --CH 2 N(R 10 )--CONH--or --C n N 2n OC(O)C m H2 m O-- where n=0, 1 or 2 and m=1-6, --C n H 2n OSiR 3-y 11 Oy--, where and R 11 is C 1 --C 12 -alkyl or phenyl, where the valence on the left of the bridging group is attached to the aromatic ring R@ or Q and the other valences in the bridging group are attached to the polyoxaalkylene radical.