Metal complexes with an adamantane-like structure

In metal complexes of the formula I ##STR1## the substituents have the following meanings: M is a metal of transition group III, IV, V or VI of the Periodic Table of the Elements or a metal of the lanthanide series, PA0 Y is a negative leaving atom or a negative leaving group, PA0 X and X.sup.1 are negatively charged or uncharged atoms of main group IV, V or VI of the Periodic Table of the Elements, PA0 Z is hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.3 -C.sub.10 -cycloalkyl, C.sub.1 -C.sub.10 -alkoxy, C.sub.1 -C.sub.10 -alkylthio or dialkylamido having from 1 to 4 carbon atoms in each alkyl radical, PA0 R.sup.1 to R.sup.11 are hydrogen, carboorganic or organosilicon radicals, PA0 n is 0, 1 or 2 and the valence of M is 2+n.

The present invention relates to metal complexes of the formula I 
##STR2## 
where the substituents have the following meanings: M is a metal of 
transition group III, IV, V or VI of the Periodic Table of the Elements or 
a metal of the lanthanide series, 
Y is a negative leaving atom or a negative leaving group, 
X and X.sup.1 are negatively charged or uncharged atoms of main group IV, V 
or VI of the Periodic Table of the Elements, 
Z is hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.3 -C.sub.10 -cycloalkyl, 
C.sub.1 -C.sub.10 -alkoxy, C.sub.1 -C.sub.10 -alkylthio or dialkylamido 
having from 1 to 4 carbon atoms in each alkyl radical, 
R.sup.1 to R.sup.11 are hydrogen, carboorganic or organosilicon radicals, n 
is 0, 1 or 2 and 40 the valence of M is 2+n. 
The present invention further relates to a process for preparing such metal 
complexes and to their use as constituents of a catalyst system for 
polymerizing olefinically unsaturated compounds. 
Metallocene complexes are known as constituents of catalyst complexes for 
polymerizing olefinically unsaturated compounds. For example, WO 95/06071 
describes heterofunctional compounds containing cyclopentadienyl radicals. 
However, this class of compounds is not able to effectively suppress chain 
transfer by .beta.-hydride elimination, which leads to premature stopping 
of the polymerization and thereby to limited molecular weights. 
DE-A 44 20 783 discloses heterofunctional, cyclopentadienyl-free compounds 
which, however, have an open catalyst structure and are therefore not 
stereoselective or favor chain transfer by .beta.-hydrogen elimination. 
It is an object of the present invention to provide novel metal complexes 
which can be used as constituents of catalyst systems for polymerizing 
olefinically unsaturated compounds and in the process effectively suppress 
.beta.-hydrogen elimination and are stereoselective. In addition, the 
novel metal complexes should be simple to prepare. 
We have found that this object is achieved by the metal complexes defined 
at the outset. 
We have also found a process for preparing such metal complexes and also 
their use as constituents of a catalyst system for polymerizing 
olefinically unsaturated compounds. 
Among the metal complexes of the formula I, preference is given to those in 
which the substituents have the following meanings: 
M is a metal of transition group IV or V of the Periodic Table of the 
Elements, preferably a metal of transition group IV, i.e. titanium, 
zirconium or hafnium, in particular titanium, 
Y is hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.3 -C.sub.10 -cycloalkyl, 
C.sub.1 -C.sub.10 -alkoxy, dialkylamido, alkylaryl, arylalkyl, haloalkyl 
or haloaryl each having from 1 to carbon atoms in the alkyl radical and 
from 6 to 20 carbon atoms in the aryl radical, or fluorine, chlorine, 
bromine or iodine, preferably C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 
-alkoxy or chlorine, in particular methyl, isobutyl, methoxy, isopropoxy 
or chlorine, 
X and X.sup.1 are negatively charged atoms of main group V or VI of the 
Periodic Table of the Elements, preferably N, P, O or S as anion, 
Z is hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.4 -C.sub.6 -cycloalkyl, 
preferably hydrogen, methyl, ethyl, n-propyl or cyclohexyl, 
R.sup.1 to R.sup.11 are hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.3 
-C.sub.10 -cycloalkyl, C.sub.6 -C.sub.20 -aryl, alkylaryl, arylalkyl, 
haloalkyl or haloaryl each having from 1 to 10 carbon atoms in the alkyl 
radical and from 6 to 20 carbon atoms in the aryl radical, or fluorine, 
chlorine, bromine or iodine, or two adjacent radicals may together form a 
cyclic group having from 4 to 5 carbon atoms, or Si(R.sup.12).sub.3 where 
R.sup.12 is C.sub.1 -C.sub.10 -alkyl, C.sub.3 -C.sub.10 -cycloalkyl or 
C.sub.6 -C.sub.15 -aryl, and 
n is preferably 2, so that the valence of M is preferably+4. 
R.sup.1 to R.sup.1 l are preferably hydrogen or C.sub.1 -C.sub.10 -alkyl, 
in particular 
R.sup.1 to R.sup.8 are hydrogen, methyl or ethyl, 
R.sup.9 is hydrogen, methyl, ethyl or n-propyl and 
R.sup.10 and R.sup.11 are methyl, ethyl, n-propyl or isopropyl. 
Examples of particularly preferred metal complexes of the formula I are: 
5,5-dimethyl-1,3-di(methylamido)cyclohexanetitanium dichloride 
5,5-diethyl-1,3-di(methylamido)cyclohexanetitanium dichloride 
5,5-dipropyl-1,3-di(methylamido)cyclohexanetitanium dichloride 
5,5-diisopropyl-1,3-di(methylamido)cyclohexanetitanium dichloride 
5,5-dibutyl-1,3-di(methylamido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(methylamido)cyclohexanetitanium 45 dichloride 
5,5-di-tert-butyl-1,3-di(methylamido)cyclohexanetitanium dichloride 
5,5-dimethyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
5,5-diethyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
5,5-dipropyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
5,5-diisopropyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
5,5-di-tert-butyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
5,5-dimethyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
5,5-diethyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
5,5-dipropyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
5,5-diisopropyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
5,5-dibutyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
5,5-di-tert-butyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
5,5-dimethyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
5,5-diethyl-1,3-di(isopropylamido)cyclohexanetitanium dichloride 
5,5-dipropyl-1,3-di(isopropylamido)cyclohexanetitanium dichloride 
5,5-diisopropyl-1,3-di(isopropylamido)cyclohexanetitanium dichloride 
5,5-dibutyl-1,3-di(isopropylamido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(isopropylamido)cyclohexanetitanium dichloride 
5,5-di-tert-butyl-1,3-di(isopropylamido)cyclohexanetitanium dichloride 
5,5-dimethyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
5,5-diethyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
5,5-dipropyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
5,5-diisopropyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
5,5-dibutyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
5,5-di-tert-butyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
5,5-dimethyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
5,5-diethyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
5,5-dipropyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
5,5-diisopropyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
5,5-dibutyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
5,5-di-sec-butyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
5,5-di-tert-butyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
5,5-dimethyl-1,3-di(ethylamido)cyclohexanedimethyltitanium 
5,5-diethyl-1,3-di(ethylamido)cyclohexanedimethyltitanium 
5,5-dipropyl-1,3-di(ethylamido)cyclohexanedimethyltitanium 
5,5-diisopropyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(ethylamido)cyclohexanedimethyltitanium 
5,5-di-tert-butyl-1,3-di(ethylamido)cyclohexanedimethyltitanium 
5,5-dimethyl-1,3-di(propylamido)cyclohexanedimethyltitanium 
5,5-diethyl-1,3-di(propylamido)cyclohexanedimethyltitanium 
5,5-dipropyl-1,3-di(propylamido)cyclohexanedimethyltitanium 
5,5-diisopropyl-1,3-di(propylamido)cyclohexanedimethyltitanium 
5,5-dibutyl-1,3-di(propylamido)cyclohexanedimethyltitanium 
5,5-di-sec-butyl-1,3-di(propylamido)cyclohexanedimethyltitanium 
5,5-di-tert-butyl-1,3-di(propylamido)cyclohexanedimethyltitanium 
5,5-dimethyl-1,3-di(propylamido)cyclohexanedimethyltitanium 
5,5-diethyl-1,3-di(isopropylamido)cyclohexanedimethyltitanium 
5,5-dipropyl-1,3-di(isopropylamido)cyclohexanedimethyltitanium 
5,5-diisopropyl-1,3-di(isopropylamido)cyclohexanedimethyltitanium 
5,5-dibutyl-1,3-di(isopropylamido)cyclohexanedimethyltitanium 
5,5-di-sec-butyl-1,3-di(isopropylamido)cyclohexanedimethyltitanium 
5,5-di-tert-butyl-1,3-di(isopropylamido)cyclohexanedimethyltitanium 
5,5-dimethyl-1,3-di(butylamido)cyclohexanedimethyltitanium 
5,5-diethyl-1,3-di(butylamido)cyclohexanedimethyltitanium 
5,5-dipropyl-1,3-di(butylamido)cyclohexanedimethyltitanium 
5,5-diisopropyl-1,3-di(butylamido)cyclohexanedimethyltitanium 
5,5-dibutyl-1,3-di(butylamido)cyclohexanedimethyltitanium 
5,5-di-sec-butyl-1,3-di(butylamido)cyclohexanedimethyltitanium 
5,5-di-tert-butyl-1,3-di(butylamido)cyclohexanedimethyltitanium 
5,5-dimethyl-1,3-di(methylamido)cyclohexanetitanium diisopropoxide 
5,5-diethyl-1,3-di(methylamido)cyclohexanetitanium diisopropoxide 
5,5-dipropyl-1,3-di(methylamido)cyclohexanetitanium diisopropoxide 
5,5-diisopropyl-1,3-di(methylamido)cyclohexanetitanium diisopropoxide 
5,5-dibutyl-1,3-di(methylamido)cyclohexanetitanium diisopropoxide 
5,5-di-sec-butyl-1,3-di(methylamido)cyclohexanetitanium diisopropoxide 
5,5-di-tert-butyl-1,3-di(methylamido)cyclohexanetitanium diisopropoxide 
5,5-dimethyl-1,3-di(ethylamido)cyclohexanetitanium diisopropoxide 
5,5-diethyl-1,3-di(ethylamido)cyclohexanetitanium diisopropoxide 
5,5-dipropyl-1,3-di(ethylamido)cyclohexanetitanium diisopropoxide 
5,5-diisopropyl-1,3-di(ethylamido)cyclohexanetitanium diisopropoxide 
5,5-di-sec-butyl-1,3-di(ethylamido)cyclohexanetitanium diisopropoxide 
5,5-di-tert-butyl-1,3-di(ethylamido)cyclohexanetitanium diisopropoxide 
5,5-dimethyl-1,3-di(propylamido)cyclohexanetitanium diisopropoxide 
5,5-diethyl-1,3-di(propylamido)cyclohexanetitanium diisopropoxide 
5,5-dipropyl-1,3-di(propylamido)cyclohexanetitanium diisopropoxide 
5,5-diisopropyl-1,3-di(propylamido)cyclohexanetitanium diisopropoxide 
5,5-dibutyl-1,3-di(propylamido)cyclohexanetitanium diisopropoxide 
5,5-di-sec-butyl-1,3-di(propylamido)cyclohexanetitanium diisopropoxide 
5,5-di-tert-butyl-1,3-di(propylamido)cyclohexanetitanium diisopropoxide 
5,5-dimethyl-1,3-di(propylamido)cyclohexanetitanium diisopropoxide 
5,5-diethyl-1,3-di(isopropylamido)cyclohexanetitanium diisopropoxide 
5,5-dipropyl-1,3-di(isopropylamido)cyclohexanetitanium diisopropoxide 
5,5-diisopropyl-1,3-di(isopropylamido)cyclohexanetitanium diisopropoxide 
5,5-dibutyl-1,3-di(isopropylamido)cyclohexanetitanium diisopropoxide 
5,5-di-sec-butyl-1,3-di(isopropylamido)cyclohexanetitanium diisopropoxide 
5,5-di-tert-butyl-1,3-di(isopropylamido)cyclohexanetitanium diisopropoxide 
5,5-dimethyl-1,3-di(butylamido)cyclohexanetitanium diisopropoxide 
5,5-diethyl-1,3-di(butylamido)cyclohexanetitanium diisopropoxide 
5,5-dipropyl-1,3-di(butylamido)cyclohexanetitanium diisopropoxide 
5,5-diisopropyl-1,3-di(butylamido)cyclohexanetitanium diisopropoxide 
5,5-dibutyl-1,3-di(butylamido)cyclohexanetitanium diisopropoxide 
5,5-di-sec-butyl-1,3-di(butylamido)cyclohexanetitanium diisopropoxide 
5,5-di-tert-butyl-1,3-di(butylamido)cyclohexanetitanium diisopropoxide 
5,5-dimethyl-1,3-di(methylphosphido)cyclohexanetitanium dichloride 
5,5-diethyl-1,3-di(methylphosphido)cyclohexanetitanium dichloride 
5,5-dipropyl-1,3-di(methylphosphido)cyclohexanetitanium dichloride 
5,5-diisopropyl-1,3-di(methylphosphido)cyclohexanetitanium dichloride 
5,5-dibutyl-1,3-di(methylphosphido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(methylphosphido)cyclohexanetitanium dichloride 
5,5-di-tert-butyl-1,3-di(methylphosphido)cyclohexanetitanium dichloride 
5,5-dimethyl-1,3-di(ethylphosphido)cyclohexanetitanium dichloride 
5,5-diethyl-1,3-di(ethylphosphido)cyclohexanetitanium dichloride 
5,5-dipropyl-1,3-di(ethylphosphido)cyclohexanetitanium dichloride 
5,5-diisopropyl-1,3-di(ethylphosphido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(ethylphosphido)cyclohexanetitanium dichloride 
5,5-di-tert-butyl-1,3-di(ethylphosphido)cyclohexanetitanium dichloride 
5,5-dimethyl-1,3-di(propylphosphido)cyclohexanetitanium dichloride 
5,5-diethyl-1,3-di(propylphosphido)cyclohexanetitanium dichloride 
5,5-dipropyl-1,3-di(propylphosphido)cyclohexanetitanium dichloride 
5,5-diisopropyl-1,3-di(propylphosphido)cyclohexanetitanium dichloride 
5,5-dibutyl-1,3-di(propylphosphido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(propylphosphido)cyclohexanetitanium dichloride 
5,5-di-tert-butyl-1,3-di(propylphosphido)cyclohexanetitanium dichloride 
5,5-dimethyl-1,3-di(propylphosphido)cyclohexanetitanium dichloride 
5,5-diethyl-1,3-di(isopropylphosphido)cyclohexanetitanium dichloride 
5,5-dipropyl-1,3-di(isopropylphosphido)cyclohexanetitanium dichloride 
5,5-diisopropyl-1,3-di(isopropylphosphido)cyclohexanetitanium dichloride 
5,5-dibutyl-1,3-di(isopropylphosphido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(isopropylphosphido)cyclohexanetitanium dichloride 
5,5-di-tert-butyl-1,3-di(isopropylphosphido)cyclohexanetitanium dichloride 
5,5-dimethyl-1,3-di(butylphosphido)cyclohexanetitanium dichloride 
5,5-diethyl-1,3-di(butylphosphido)cyclohexanetitanium dichloride 
5,5-dipropyl-1,3-di(butylphosphido)cyclohexanetitanium dichloride 
5,5-diisopropyl-1,3-di(butylphosphido)cyclohexanetitanium dichloride 
5,5-dibutyl-1,3-di(butylphosphido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(butylphosphido)cyclohexanetitanium dichloride 
5,5-di-tert-butyl-1,3-di(butylphosphido)cyclohexanetitanium dichloride 
5,5-dimethyl-1,3-di(methylphosphido)cyclohexanedimethyltitanium 
5,5-diethyl-1,3-di(methylphosphido)cyclohexanedimethyltitanium 
5,5-dipropyl-1,3-di(methylphosphido)cyclohexanedimethyltitanium 
5,5-diisopropyl-1,3-di(methylphosphido)cyclohexanedimethyltitanium titanium 
5,5-dibutyl-1,3-di(methylphosphido)cyclohexanedimethyltitanium 
5,5-di-sec-butyl-1,3-di(methylphosphido)cyclohexanedimethyltitanium 
5,5-di-tert-butyl-1,3-di(methylphosphido)cyclohexanedimethyltitanium 
5,5-dimethyl-1,3-di(ethylphosphido)cyclohexanedimethyltitanium 
5,5-diethyl-1,3-di(ethylphosphido)cyclohexanedimethyltitanium 
5,5-dipropyl-1,3-di(ethylphosphido)cyclohexanedimethyltitanium 
5,5-diisopropyl-1,3-di(ethylphosphido)cyclohexanetitanium dichloride 
5,5-di-sec-butyl-1,3-di(ethylphosphido)cyclohexanedimethyltitanium 
5,5-di-tert-butyl-1,3-di(ethylphosphido)cyclohexanedimethyltitanium 
5,5-dimethyl-1,3-di(propylphosphido)cyclohexanedimethyltitanium 
5,5-diethyl-1,3-di(propylphosphido)cyclohexanedimethyltitanium 
5,5-dipropyl-1,3-di(propylphosphido)cyclohexanedimethyltitanium 
5,5-diisopropyl-1,3-di(propylphosphido)cyclohexanedimethyltitanium 
5,5-dibutyl-1,3-di(propylphosphido)cyclohexanedimethyltitanium 
5,5-di-sec-butyl-1,3-di(propylphosphido)cyclohexanedimethyltitanium 
5,5-di-tert-butyl-1,3-di(propylphosphido)cyclohexanedimethyltitanium 
5,5-dimethyl-1,3-di(propyphosphido)cyclohexanedimethyltitanium 
5,5-diethyl-1,3-di(isopropylphosphido)cyclohexanedimethyltitanium 
5,5-dipropyl-1,3-di(isopropylphosphido)cyclohexanedimethyltitanium 
5,5-diisopropyl-1,3-di(isopropylphosphido)cyclohexanedimethyltitanium 
5,5-dibutyl-1,3-di(isopropylphosphido)cyclohexanedimethyltitanium 
5,5-di-sec-butyl-1,3-di(isopropylphosphido)cyclohexanedimethyltitanium 
5,5-di-tert-butyl-1,3-di(isopropylphosphido)cyclohexanedimethyltitanium 
5,5-dimethyl-1,3-di(butylphosphido)cyclohexanedimethyltitanium 
5,5-diethyl-1,3-di(butylphosphido)cyclohexanedimethyltitanium 
5,5-dipropyl-1,3-di(butylphosphido)cyclohexanedimethyltitanium 
5,5-diisopropyl-1,3-di(butylphosphido)cyclohexanedimethyltitanium 
5,5-dibutyl-1,3-di(butylphosphido)cyclohexanedimethyltitanium 
5,5-di-sec-butyl-1,3-di(butylphosphido)cyclohexanedimethyltitanium 
5,5-di-tert-butyl-1,3-di(butylphosphido)cyclohexanedimethyltitanium 
5,5-dimethyl-1,3-di(methylphosphido)cyclohexanetitanium diisopropoxide 
5,5-diethyl-1,3-di(methylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dipropyl-1,3-di(methylphosphido)cyclohexanetitanium diisopropoxide 
5,5-diisopropyl-1,3-di(methylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dibutyl-1,3-di(methylphosphido)cyclohexanetitanium diisopropoxide 
5,5-di-sec-butyl-1,3-di(methylphosphido)cyclohexanetitanium diisopropoxide 
5,5-di-tert-butyl-1,3-di(methylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dimethyl-1,3-di(ethylphosphido)cyclohexanetitanium diisopropoxide 
5,5-diethyl-1,3-di(ethylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dipropyl-1,3-di(ethylphosphido)cyclohexanetitanium diisopropoxide 
5,5-diisopropyl-1,3-di(ethylphosphido)cyclohexanetitanium diisopropoxide 
5,5-di-sec-butyl-1,3-di(ethylphosphido)cyclohexanetitanium diisopropoxide 
5,5-di-tert-butyl-1,3-di(ethylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dimethyl-1,3-di(propylphosphido)cyclohexanetitanium diisopropoxide 
5,5-diethyl-1,3-di(propylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dipropyl-1,3-di(propylphosphido)cyclohexanetitanium diisopropoxide 
5,5-diisopropyl-1,3-di(propylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dibutyl-1,3-di(propylphosphido)cyclohexanetitanium diisopropoxide 
5,5-di-sec-butyl-1,3-di(propylphosphido)cyclohexanetitanium diisopropoxide 
5,5-di-tert-butyl-1,3-di(propylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dimethyl-1,3-di(propylphosphido)cyclohexanetitanium diisopropoxide 
5,5-diethyl-1,3-di(isopropylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dipropyl-1,3-di(isopropylphosphido)cyclohexanetitanium diisopropoxide 
5,5-diisopropyl-1,3-di(isopropylphosphido)cyclohexanetitanium 
diisopropoxide 
5,5-dibutyl-1,3-di(isopropylphosphido)cyclohexanetitanium diisopropoxide 
5,5-di-sec-butyl-1,3-di(isopropylphosphido)cyclohexanetitanium 
diisopropoxide 
5,5-di-tert-butyl-1,3-di(isopropylphosphido)cyclohexanetitanium 
diisopropoxide 
5,5-dimethyl-1,3-di(butylphosphido)cyclohexanetitanium diisopropoxide 
5,5-diethyl-1,3-di(butylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dipropyl-1,3-di(butylphosphido)cyclohexanetitanium diisopropoxide 
5,5-diisopropyl-1,3-di(butylphosphido)cyclohexanetitanium diisopropoxide 
5,5-dibutyl-1,3-di(butylphosphido)cyclohexanetitanium diisopropoxide 
5,5-di-sec-butyl-1,3-di(butylphosphido)cyclohexanetitanium diisopropoxide 
5,5-di-tert-butyl-1,3-di(butylphosphido)cyclohexanetitanium diisopropoxide 
2,5,5-trimethyl-1,3-di(methylamido)cyclohexanetitanium dichloride 
2,5,5-trimethyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
2,5,5-trimethyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
2,5,5-trimethyl-1,3-di(isopropylamido)cyclohexanetitanium dichloride 
2,5,5-trimethyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
2,5,5-trimethyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
2,5,5-trimethyl-1,3-di(benzylamido)cyclohexanetitanium dichloride 
2,5,5-trimethyl-1,3-di(methylamido)cyclohexanetitanium dibenzyl 
2-ethyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanetitanium dichloride 
2-ethyl-5,5-dimethyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
2-ethyl-5,5-dimethyl-1,3-di(isopropylamido)cyclohexanetitanium dichloride 
2-ethyl-5,5-dimethyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
2-ethyl-5,5-dimethyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
2-ethyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
2-ethyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanedibenzyltitanium 
2-butyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanetitanium dichloride 
2-butyl-5,5-dimethyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
2-butyl-5,5-dimethyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
2-butyl-5,5-dimethyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
2-butyl-5,5-dimethyl-1,3-di(isopropylamido)cyclohexanetitanium dichloride 
2-butyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
2-butyl-5,5-dimethyl-1,3-di(benzylamido)cyclohexanetitanium dichloride 
2-butyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanedibenzyltitanium 
2-butyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanedibutyltitanium 
2-benzyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanetitanium dichloride 
2-benzyl-5,5-dimethyl-1,3-di(ethylamido)cyclohexanetitanium dichloride 
2-benzyl-5,5-dimethyl-1,3-di(propylamido)cyclohexanetitanium dichloride 
2-benzyl-5,5-dimethyl-1,3-di(isopropylamido)cyclohexanetitanium dichloride 
2-benzyl-5,5-dimethyl-1,3-di(butylamido)cyclohexanetitanium dichloride 
2-benzyl-5,5-dimethyl-1,3-di(benzylamido)cyclohexanetitanium dichloride 
2-benzyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanedimethyltitanium 
2-benzyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanedibutyltitanium 
2-benzyl-5,5-dimethyl-1,3-di(methylamido)cyclohexanedibenzyltitanium 
2-benzyl-5,5-dimethyl-1,3-di(benzylamido)cyclohexanedimethyltitanium 
2-benzyl-5,5-dimethyl-1,3-di(benzylamido)cyclohexanedibenzyltitanium 
2-benzyl-5,5-dimethyl-1,3-di(benzylamido)cyclohexanedibutyltitanium 
2-benzyl-5,5-dimethyl-1,3-di(isopropylamido)cyclohexanedimethyltitanium. 
The metal complexes 1,3-dimethylamido-5,5-dimethylcyclohexanetitanium 
dichloride, 1,3-dimethylamido-5,5-dimethylcyclohexanedimethyltitanium and 
1,3-di(isopropylamido)-2,5,5-trimethylcyclohexanetitanium dichloride are 
particularly preferred. 
The novel metal complexes of the formula I can be prepared by the following 
methods: 
A compound of the formula II 
##STR3## 
is metallated. 
This is preferably done by reacting a compound of the formula II with 
hydrides, carboorganic compounds, nitrogenorganic compounds or 
organosilicon compounds of alkali metals or alkaline earth metals and then 
treating the product with halogen, alkoxy or aryloxy compounds of M. 
Compounds of the formula II can be prepared as follows: 
A compound of the formula V 
##STR4## 
where R.sup.13 and R.sup.14 are .dbd.O, .dbd.S or .dbd.NR.sup.15 where 
R.sup.15 is hydrogen, C.sub.1 -C.sub.10 -alkyl or C.sub.4 -C.sub.6 
-cycloalkyl, 
can be reacted with hydrides or amides of alkali metals or alkaline earth 
metals or with carboorganic compounds or organosilicon compounds, which 
may also contain halogens, to give compounds of the formula IV 
##STR5## 
which may be reduced to give compounds of the formula III 
##STR6## 
where R.sup.16 and R.sup.17 are --OH, --SH, --NHR.sup.15, and these can be 
converted into compounds of the formula II by introducing, if desired, 
tosylate, mesylate or triflate groups and subsequently treating with 
amine, alkali metal amide or alkali metal phosphide. 
Compounds of the formula II can also be prepared as follows: 
A compound of the formula VI 
##STR7## 
is reduced to give compounds of the formula VII 
##STR8## 
which can be alkylated on the nitrogen to give compounds of the formula 
II. 
The preparation of compounds of the formula I is preferably carried out by 
dissolving a compound of the formula II in a solvent such as THF, diethyl 
ether, dioxane or toluene, preferably in THF, and reacting it at from -78 
to 60.degree. C. with preferably a 2.1 molar amount of metallating 
reagents such as alkali metal hydrides, butyllithium, methyllithium, 
phenyllithium, naphthalenesodium, lithium diisopropylamide or lithium 
bis(trimethylsilyl)amide, preferably butyllithium, and subsequently 
reacting the product with transition metal halides, alkoxides or amides, 
preferably chlorides, or transition metal chloride-THF complexes. 
If desired, compounds of the formula I can be modified by replacement of 
the halogen ligands on M. Preferably, compounds of the formula I are 
dissolved in solvents such as THF, diethyl ether or toluene at from -78 to 
100.degree. C. and treated with an at least twice molar amount of 
methylmagnesium chloride, butyllithium, methyllithium or benzylmagnesium 
bromide to give alkyl or arylalkyl derivatives of compounds of the formula 
I. 
The compounds of the formula II are preferably obtained by 
A) if appropriate, reaction of compounds of the formula V with alkali metal 
hydrides, butyllithium, methyllithium, phenyllithium, naphthalenesodium, 
lithium diisopropylamide, lithium bis(trimethylsilyl)amide or alkali metal 
alkoxides, preferably lithium diisopropylamide or potassium tert-butoxide, 
in solvents such as THF, diethyl ether, dioxane, toluene or alcohols, 
preferably THF or butanol, at from -78 to 65.degree. C. with a 1-3.5 molar 
amount of alkyl halides, trialkylsilyl chlorides or arylalkyl halides to 
give compounds of the formula IV. Compounds of the formula IV are 
preferably reduced to compounds of the formula III by reaction with 
lithium aluminum hydride, sodium borohydride or other customary reducing 
agents, where a twice molar amount of reducing agent is added at from -78 
to 100.degree. C. in THF, diethyl ether, dioxane or toluene. Compounds of 
the formula III are preferably reacted with p-toluenesulfonyl chloride, 
trifluoromethanesulfonic anhydride or methanesulfonyl chloride, 
particularly preferably trifluoromethanesulfonic anhydride, in the 
presence of 1-2 molar amounts of bases such as pyridine, quinoline or 
triethylamine in solvents such as THF, DMF, acetonitrile, dimethyl 
sulfoxide, diethyl ether or methylene chloride at from -78 to 60.degree. 
C. The intermediates are preferably reacted in situ with methylamine, 
lithium isopropylamide, lithium methylamide, lithium butylphosphide or 
lithium phenylphosphide at from -78 to 60.degree. C. to give compounds of 
the formula II. 
B) Compounds of the formula VII are preferably obtained by reducing 
compounds of the formula VI with hydrogen, if desired in the presence of 
catalysts such as Ni, platinum, Raney nickel or ruthenium, in solvents 
such as THF, toluene, diethyl ether, dioxane or methanol at from -78 to 
120.degree. C. 
Compounds of the formula VII can, if appropriate, be dissolved in solvents 
such as THF, diethyl ether or toluene and reacted at from -78 to 
80.degree. C. with customary alkylating agents, for example methyl iodide 
or isopropyl bromide, to give compounds of the formula II. 
The metal complexes of the present invention are simple to prepare and are 
suitable as constituents of catalyst systems for polymerizing olefinically 
unsaturated compounds. The adamantane-like structure of the metal 
complexes of the present invention is achieved by reversible agostic 
coordination, giving a stereoselective catalyst system which effectively 
suppresses chain transfer by .beta.-hydride elimination.

EXAMPLES 
Example 1 
Preparation of 1,3-dimethylamido-5,5-dimethylcyclohexanetitanium dichloride 
I1 
a) 5,5-dimethylcyclohexane-1,3-diol 
14.0 g (0.1 mol) of dimedone were dissolved in 200 ml of THF. 3.8 g (0.1 
mol) of NaBH.sub.4 and 5 mmol of CeCl.sub.3 dissolved in 50 ml of THF were 
then added at -30.degree. C. The mixture was stirred at room temperature 
for another 2 hours and was hydrolyzed at 0.degree. C. by means of 
methanol/water. The organic phase was separated off and the solvent was 
removed. The residue was extracted with ethanol and unreacted dimedone was 
removed by crystallization. This gave 11.5 g (80%) of 
5,5-dimethylcyclohexane-1,3-diol. 
b) 5,5-dimethylcyclohexane 1,3-ditosylate 
0.28 mol of absolute pyridine was carefully added at 0.degree. C. to a 
solution of 10.8 g (75 mmol) of 5,5-dimethylcyclohexane-1,3-diol and 26.7 
g (0.14 mol) of p-toluenesulfonyl chloride in 180 ml of methylene 
chloride. After warming to room temperature, the mixture was stirred for a 
further 2 hours and subsequently hydrolyzed by addition of 100 g of ice 
and 30 ml of concentrated sulfuric acid. The organic phase was separated 
off and the solvent was removed under reduced pressure. The crude product 
was recrystallized from methylene chloride/diethyl ether. Yield: 22.2 g 
(70%). 
c) 1,3-dimethylamino-5,5-dimethylcyclohexane 
20.3 g (45 mmol) of 5,5-dimethylcyclohexane 1,3-ditosylate were dissolved 
in 200 ml of ethanol/water and admixed with 90 mmol of aqueous 
methylamine. The mixture was stirred for 12 hours at room temperature. 
After addition of sodium bicarbonate, the solution was extracted a number 
of times with diethyl ether. The ether extracts were evaporated to dryness 
and the crude product was washed with water. Yield: 6.1 g (79%). 
d) 1,3-dimethylamido-5,5-dimethylcyclohexanetitanium dichloride I1 
5.1 g (30 mmol) of 1,3-dimethylamino-5,5-dimethylcyclohexane were dissolved 
in 75 ml of THF at -78.degree. C. and admixed with 60 mmol of 
n-butyllithium. The mixture was warmed to room temperature and stirred for 
12 hours. The solvent was removed and the residue was digested a number of 
times with diethyl ether. The resulting 
1,3-dimethylamido-5,5-dimethylcyclohexanedilithium compound was 
redissolved at -78.degree. C. in 75 ml of absolute THF and admixed with a 
solution of 5.9 g (31 mmol) of TiCl.sub.4 in 15 ml of THF. The cooling was 
removed and the mixture was stirred for a further 15 hours. The 
precipitated LiCl was filtered off and the THF solution was evaporated 
under reduced pressure. The oil which remained was recrystallized from 
diethyl ether/THF, giving a crystalline solid. Yield: 6.7 g (78%). 
Example 2 
Preparation of 1,3-dimethylamido-5,5-dimethylcyclohexanedimethyltitanium I2 
At -78.degree. C., 33.3 ml (0.1 mol) of a 3.0 M solution of methylmagnesium 
chloride in THF were added to 14.3 g (0.05 mol) of 
1,3-dimethylamido-5,5-dimethylcyclohexanetitanium dichloride I1. The 
cooling was removed and the mixture was warmed to room temperature over a 
period of 4 hours. The solvent was removed under reduced pressure and the 
oily suspension which remained was extracted with diethyl ether. The 
combined ether extracts were evaporated and the product was crystallized 
by cooling to -30.degree. C. This gave 6.9 g (56%) of pale yellow 
crystals. 
Example 3 
Preparation of 1,3-di(isopropylamido)-2,5,5-trimethylcyclohexanetitanium 
dichloride I3 
a) 2,5,5-trimethylcyclohexane-1,3-dione 
28.0 g (0.2 mol) of dimedone were dissolved in 150 ml of absolute t-butanol 
and, at 40.degree. C., 22.4 g (0.2 mol) of potassium t-butoxide were added 
a little at a time. After 2 hours, an equimolar amount of methyl iodide 
was added. After a further 2 hours, the solvent was removed under reduced 
pressure and the residue which remained was extracted 3 times with diethyl 
ether. The combined ether extracts were evaporated to dryness. Yield: 26.2 
g (85%). The crude product was not purified further. 
b) 2,5,5-trimethylcyclohexane-1,3-diol 
23.1 g (0.15 mol) of 2,5,5-trimethylcyclohexane-1,3-dione were dissolved in 
200 ml of THF at -30.degree. C. and 5.7 g (0.15 mol) of LiAlH.sub.4 were 
added carefully. The mixture was stirred for minutes at -30.degree. C. and 
subsequently for 15 hours at room temperature. The unreacted LiAlH.sub.4 
was deactivated by addition of 50 ml of absolute methanol. The reaction 
mixture was extracted a number of times with dichloromethane and the 
organic phase was separated off and evaporated. The diol was obtained as a 
cis/trans mixture in a yield of 90% (21.3 g). 
c) 2,5,5-trimethylcyclohexane 1,3-ditosylate 
0.38 mol of absolute pyridine was carefully added at 0.degree. C. to a 
solution of 15.8 g (0.1 mol) of 2,5,5-trimethylcyclohexane-1,3-diol and 
36.2 g (0.19 mol) of p-toluenesulfonyl chloride in 200 ml of methylene 
chloride. After warming to room temperature, the mixture was stirred for 
another 2 hours and was subsequently hydrolyzed by addition of 160 g of 
ice and 45 ml of concentrated sulfuric acid. The organic phase was 
separated off and the solvent was removed under reduced pressure. The 
crude product was recrystallized from methylene chloride/diethyl ether. 
Yield: 31.0 g (70%). 
d) 1,3-di(isopropylamino)-2,5,5-trimethylcyclohexane 
30.3 g (0.065 mol) of 2,5,5-trimethylcyclohexane 1,3-ditosylate were 
dissolved in 250 ml of THF at -30.degree. C. and admixed with 0.13 mol of 
lithium isopropylamide. The mixture was stirred at this temperature for 2 
hours and subsequently left for a further 12 hours at room temperature. 
The THF was removed under reduced pressure and the residue was extracted 
with diethyl ether. The ether was removed and the crude product was used 
further. Yield: 14.8 g (95%). 
e) 1,3-di(isopropylamido)-2,5,5-trimethylcyclohexanetitanium dichloride I3 
The crude 1,3-di(isopropylamino)-2,5,5-trimethylcyclohexane (14.8 g; 0.062 
mol) was dissolved in 100 ml of THF at -78.degree. C. and admixed with 
0.124 mol of n-butyllithium. After 30 minutes, the cooling was removed and 
the mixture was stirred for a further 2 hours at room temperature. The 
solution was evaporated to dryness and the residue was digested a number 
of times at -78.degree. C. with diethyl ether/hexane. The colorless 
product which remained was redissolved in 100 ml of THF and cooled to 
-78.degree. C. 12.3 g (65 mmol) of TiCl.sub.4 were added over a period of 
30 minutes and the mixture was stirred for a further 12 hours at room 
temperature. The THF was removed and the residue was extracted a number of 
times with diethyl ether. The combined ether extracts were evaporated and 
the crude product was recrystallized from diethyl ether/THF. Yield: 14.4 g 
(65%). 
Comparative Example C1 
Preparation of (N,N'-dimethylamido-1,2-ethane)titanium dichloride 
3.5 g (40 mmol) of N,N'-dimethylethylenediamine were dissolved in 60 ml of 
THF at -78.degree. C. and admixed with 80 mmol of n-butyllithium. The 
mixture was warmed to room temperature and stirred for 12 hours. The 
solvent was removed and the residue was again digested with a 1:1 mixture 
of diethyl ether and n-hexane. 
The resulting (N,N'-dimethylamido-1,2-ethane)dilithium compound was 
dissolved in 75 ml of absolute THF at -78.degree. C. and admixed with 8.0 
g (42 mmol) of titanium tetrachloride. The cooling was removed and the 
mixture was stirred for a further 12 hours. The precipitated LiCl was 
filtered off and the THF solution was evaporated under reduced pressure. 
The oil which remained was recrystallized from diethyl ether, giving a 
crystalline solid. Yield: 5.9 g (72%).