in benzene placing the Re compd. and the Tl compd. in benzene in a Ar-flushed Schlenk flask and refluxing for 20 h; cooling to room temp., filtn. through a celite plug on a glas frit, evapn., chromy. of the residue on alumina, elution of the Re2(CO)10 with pentane, elution with benzene and evapn.; elem. anal.;

in tetrahydrofuran addn. of the Ti compd. to the Tl compd. in THF in an Ar-flushed Schlenk flask and stirring for 19 h; filtn. through a celite plug on a glas frit, evapn., extn. of the residue in a Soxhlet with hexane (10 h) and CCl4 (12 h), evapn. and crystn. from CH2Cl2-hexane; elem. anal.;

in benzene addn. of the Mn compd. to the Tl compd. in benzene in a Ar-flushed Schlenk flask and refluxing for 18 h; cooling to room temp., filtn. through a celite plug on a glas frit, evapn., chromy. of the residue on alumina, elution of the Mn2(CO)10 with pentane, elution with benzene and evapn.; elem. anal.;