in dichloromethane React. of CrO3 with 1 equiv of Ph3CCl in CH2Cl2 results in a deep red soln. after stirring of mixt. (24 h, room temp., vac. or Ar).; Evapn. to dryness, extn. (hexane) and cooling to 0°C yields CrO2Cl(OCPh3) with Ph3CCl. Purifn. by repeated crystn. (C6H14). Extg. of remained residue from first extn. (CH2Cl2/C6H14) and crystn. at -20°C yields CrO2(OCPh3)2. Elem. anal.;
Gomberg, M.
Ber. Dtsch. Chem. Ges., 1902 , vol. 35, p. 1822 - 1840
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Pfeiffer, P.
Liebigs Annalen der Chemie, 1911 , vol. 383, p. 92 - 155
