methyl iodide in hexane in presence of H2N(CH2)4NH2, under ice cooling, hydrolysis, M ratio of (m-CH3C6H4CH3)2Cr and (p-CH3C6H4CH3)2Cr 3:4; chromy.;

methyl iodide in hexane under ice cooling, hydrolysis, M ratio of (m-CH3C6H4CH3)2Cr, (p-CH3C6H4CH3)2Cr and (2.3.5-(CH3)3C6H3)2Cr=11:13.2:3.8:7.3; chromy.;

Al/AlBr3; Na2S2O4/KOH in neat (no solvent) homogenizing of CrBr3, Al and AlBr3 (N2 atmosphere), o-xylene addn., stirring (room temp., 14 h), solvolysis (H2O/MeOH/petroleum ether, ice cooling), water/methanolic phase redn. (Na2S2O4/KOH/benzene); benzene phase sepn., drying (KOH), evapn., recrystn. (THF, -80°C), sublimation;

in gas react. of vaporized chromium in a metal reactor at about 2E-6 torr; extn. with diethyl ether, sublimation under vacuum, (1)H-NMR;

in gas static metal vapour atom reactor (according to V. Graves and J. Lagowski, Inorg. Chem., 15 (1976) 577); not isolated, detd. by MAS spectroscopy;

in gas static metal vapour atom reactor (according to V. Graves and J. Lagowski, Inorg. Chem., 15 (1976) 577); not isolated, detd. by MAS spectroscopy;

in gas static metal vapour atom reactor (according to V. Graves and J. Lagowski, Inorg. Chem., 15 (1976) 577); not isolated, detd. by MAS spectroscopy;