in toluene T=4 - 20°C; 1.25 h;

in dichloromethane-d2 byproducts: THF; at -80°C; not isolated, detected by NMR;

in tetrahydrofuran under N2, Schlenk techniques; Zr complex dissolved in THF;

1: n-amyl iodide; CpMgCl in tetrahydrofuran T=20 - 60°C; 4.08333 h; Inert atmosphere; 2: With n-butyllithium in hexanes; diethyl ether T=20°C; 0.666667 h; Inert atmosphere; 3: ZrCl4(tetrahydrofuran)2 in hexanes; diethyl ether T=20°C; 2.5 h; Inert atmosphere;

in tetrahydrofuran (N2); std. Schlenk technique; soln. of Na compd. (2 equiv.) in THF was slowly added to stirred suspn. of Zr compd. in THF at -78°C; warmed to room temp.; refluxed for 18 h; cooled; filtered; dried (vac.); sublimed (180°C, 0.1 Torr); elem.anal.;

in ethylene glycol dimethyl ether; toluene N2 atmosphere; addn. of soln. of org. compd. in DME to Zr-compd. in toluene, refluxing (1 h), stirring (12 h, room temp.); evapn., extn. (toluene), recrystn. (toluene);

n-butyllithium in tetrahydrofuran; hexane; toluene N2-atmosphere; dropwise addn. of BuLi (in hexane) to indene derivative (in THF) at -78°C, warming to room temp., stirring for 30 min, dropwise addn. to Zr-complex (in PhMe) over 2 h at 0°C, stirring (room temp., 2 h, pptn.); filtration, washing (THF/PhMe=1:2), drying (vac., overnight); elem. anal.;