PREPARATION AND STEREOSELECTIVITY OF [CR( L-ISOLEU OR D-ISOLEU) (L-LEU)(2)]

fac(+)-[Cr(L-isoleu)(L-leu)2].3 H2O and fac(-)-[Cr(D-isoleu)(L-leu)2]. 3 H2O were prepared by a method, in which [Cr(L-leu)2(NCS)(OH2)] (leu= leucinato) was heated with L- and D-isoleucine, respectively, in ethan ol solution (75-degrees-C, 5h). Also, fac(+)-[Cr (L-isoleu)(L-leu)g].2 H2O and fac(-)-[Cr(D-isoleu)(L-leU)2].2 H2O were obtained from the fi ltrate independent of the standing temperatures (5 approximately 55-de grees-C) at 10 days. In the case of DL-isoleucine, the diastereomeric mixture of fac(+)-[Cr(L-isoleu)(L-leu)2].3 H2O and fac (-)-[Cr(D-isole u)(L-leu)2].3 H2O were prepared during heating. While, fac(-)-[Cr(D-is o-leu)(L-leu)2].2 H2O (standing temperature 5 or 25-degrees-C) and fac (+)-[Cr(L-isoleu) (L-leu)2].2 H2O (standing temperature 40 or 55-degre es-C) were obtained from the filtrate. By using this method, the optic al resolution Of DL-isoleucine was suggested.