Titanocenes, the use thereof, and n-substituted fluoroanilines

A titanocene of formula I ##STR169## in which both R.sup.1 radicals, independently of one another, are cyclopentadienyl.sup..crclbar., idenyl.sup..crclbar. or 4,5,6,7-tetrahydroindenyl.sup..crclbar., each of which is unsubstituted or substituted by C.sub.1 -C.sub.18 alkyl or -alkoxy, C.sub.2 -C.sub.18 alkenyl, C.sub.5 -C.sub.8 cycloalkyl, C.sub.6 -C.sub.16 aryl, C.sub.7 -C.sub.16 aralkyl, SiR.sub.3.sup.4, GeR.sub.3.sup.4, cyano or halogen, or both R.sup.1 together are a radical of the formula II ##STR170## unsubstituted or substituted as above, in which X is --CH.sub.2n where n=1, 2 or 3, unsubstituted or phenyl-substituted alkylidene having 2 to 12 carbon atoms, cycloalkylidene having 5 to 7 ring carbon atoms, SiR.sub.2.sup.4, SiR.sub.2.sup.4--O--SiR.sub.2.sup.4, GeR.sub.2.sup.4 or SnR.sub.2.sup.4, and R.sup.4 is C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.6 -C.sub.16 aryl or C.sub.7 -C.sub.17 aralkyl, R.sup.2 is a 6-membered carbocyclic aromatic radical which is substituted by fluorine atoms in at least one of the two ortho-positions to the titanium-carbon bond, and in which the aromatic radical may contain further substituents, R.sup.3 has one of the definitions given for R.sup.2, or R.sup.2 and R.sup.3 together are a radical of the formula III

• --Q--Y--Q-- III
• in which Q is a carbocyclic aromatic radical where the two bonds are each in the ortho-position to the Y group and the second ortho-position to the titanium-carbon bond is in each case substituted by a fluorine atom, and where Q may contain further substituents, and Y is CH.sub.2, alkylidene having 2 to 12 carbon atoms, cycloalkylidene having 5 to 7 ring carbon atoms, NR.sup.4, O, S, SO, SO.sub.2, CO, SiR.sub.2.sup.4, GeR.sub.2.sup.4, or SnR.sub.2.sup.4, and R.sup.4 is as defined above, wherein, in the titanocenes, R.sup.2 and R.sup.3 or the radical of the formula III are substituted by a radical of the formula IV ##STR171## in which R.sup.5 is hydrogen, linear or branched C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.20 alkenyl, C.sub.3 -C.sub.8 cycloalkyl, C.sub.4 -C.sub.20 cycloalkylalkyl or -alkylcycloalkyl, C.sub.5 -C.sub.20 alkylcycloalkylalkyl, C.sub.6 -C.sub.20 cycloalkenylalkyl, C.sub.6 -C.sub.14 aryl, C.sub.7 -C.sub.20 aralkyl or -alkaryl, C.sub.8 -C.sub.20 alkaralkyl or C.sub.3 -C.sub.12 trialkylsilyl, where these radicals are unsubstituted or substituted by C.sub.1 -C.sub.18 alkoxy, C.sub.1 -C.sub.18 alkylthio, C.sub.1 -C.sub.18 alkylsulphonyl, C.sub.6 -C.sub.10 arylsulphonyl, C.sub.7 -C.sub.20 alkarylsulphonyl or cyano, R.sup.6 has one of the definitions given for R.sup.5 or is C.sub.1 -C.sub.20 halogenoalkyl, C.sub.2 -C.sub.20 alkyl which is interrupted by --CO--, or C.sub.1 -C.sub.12 alkyl which is substituted by --COOH or --COOR.sup.4, and, in the case where Y.sup.1 is --CO--, --CS-- or --SO.sub.2 --, may also be --NR.sup.7 R.sup.8 in which R.sup.7 and R.sup.8, independently of one another, have one of the definitions given for R.sup.5, Y.sup.1 is a --CO--, --CS--, --COO--, --SO.sub.2 -- or SiR.sub.2.sup.4 -- in which R.sup.4 is as defined above, with the proviso, that when R.sup.5 is hydrogen or alkyl, R.sup.7 is hydrogen or alkyl, and Y.sup.1 is --COO-- or --CONR.sup.7 --, R.sup.6 or R.sup.8 is not alkoxyalkyl.