in hexane; benzene a mixt. of Cp2ZrHCl and 1-octene in benzene was stirred for ca. 2 h at room temp. under N2, a soln. of anhyd. SnCl4 in n-hexane was added dropwise (Cp2ZrHCl/SnCl4 ratio 4:1), stirred for a further 1 h 30 min; hexane was added, ppt. of Cp2ZrCl2 was filtered off, filtrate concd., residue extd. with hexane, exts. concd., dild. with methanol; (octyl)SnCl3 content was detd. by titrn. with EDTA, yield of (octyl)2SnCl2 was estimated by conversion into (octyl)2SnO;

aluminium trichloride 130°C;

1: 2,2,4-trimethylpentane View Scheme

in acetone molar ratio 1:2, under CO2 atmosphere;

240°C;

sodium

in 2,2,4-trimethylpentane under N2, 13 h reflux;

1: Na 2: HCl / diethyl ether View Scheme

1: Na 2: chlorobenzene View Scheme

1: Na 2: xylene View Scheme