(i) Et2O, (ii) aq. NH4Cl; Multistep reaction;

1: (i) Et2O, (ii) aq. NH4Cl 2: H2SO4 View Scheme

1: diethyl ether; benzene / 2 h / Heating 2: tetrabutylammonium sulfate, 4 N NaOH / CH2Cl2 / 10 h View Scheme

(i) Et2O, (ii) aq. NH4Cl; Multistep reaction;

in tetrahydrofuran Addn. of a THF-soln. of o-(BrMgCH2)C6H4CH3 to FeCl2(P(OMe)3)3 suspn. (0°C, Ar, Schlenk flask). Color turns red then brown with formation of black ppt. Stirring (overnight, room temp.).; Removing of solvent under vac., dissolving of residue in pentane. On cooling white crystals of bis(o-methylphenyl)-1,2-ethane are obtained.;

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in diethyl ether 1.) 2 h, reflux, 2.) 15 h;