Resolution of tris

The resolution of tris(catecholato)chromate(III) has been achieved by crystallization with L-[Co(en)3]3+ the diastereomeric salt isolated contained the L-[Cr(cat)3]3 ion.793 Comparison of the properties of this anion with the chromium(III) enterobactin complex suggested that the natural product stereospeeifically forms the L-cis complex with chromium(III) (190). The tris(catecholate) complex K3[Cr(Cat)3]-5H20 crystallizes in space group C2/c with a = 20.796, 6 = 15.847 and c = 12.273 A and jS = 91.84° the chelate rings are planar.794 Electrochemical and spectroscopic studies of this complex have also been undertaken.795 Recent molecular orbital calculations796 on quinone complexes are consistent with the ligand-centred redox chemistry generally proposed for these systems.788... [Pg.866]

Bonner, W. A., Enantioselective autocatalysis. V. The spontaneous resolution of tri-o-thymotide. Orig. Life Evol. Biosph. 1999, 29, 317-328. [Pg.473]

Barium hexafluorosilicate, preparation of, for decomposition to silicon tetrafluoride, 4 145 Barium paraperiodate (orthoperiodate), Ba3H4(I06)2, 1 171 Barium dezZro-tartrate, for resolution of tris(ethylenediamine)-cobalt(III) ion, 6 184 Barium thiocyanate, 3 24 Benzalazine, in recovery of hydrazine residues, 1 92 Benzoylacetone, beryllium derivative of, 2 19... [Pg.226]

RESOLUTION OF TRIS (ETHYLENEDIAMINE) -RHODIUM (IU) AND -CHROMIUM (III) CHLORIDE BY MEANS OF (+)-TARTRATE... [Pg.269]

Methods for the preparation of tris(ethylenediamine)rhodium-(III) chloride hydrate and for its resolution by means of the diastereoisomer Ii (—)D-lRh(en)s] (- -)-tart 2 3H20 are presented. The resolution of tris(ethylenediamine)chromium(III) chloride by means of an analogous diastereoisomeric compound is also described. [Pg.269]

The second piece of work I wish to mention is a quite different sort, involving attempts to achieve the optical resolution of tris-ethylenediamine cobalt(III) chloride, [CoensJCls, by bacterial action. Many chemists have studied the physiological action of metal complexes, and Dwyer and his... [Pg.110]

EXPERIMENT 8.2 RESOLUTION OF TRIS(1,10-PHENANTHROLINE)-CHROMIUM(III) HEXAFLUOROPHOSPHATE, [Cr(phen)3] (PF6)3 BY FRACTIONAL PRECIPITATION USING ANTIMONYL-d-TARTRATE... [Pg.196]

Results Summary for the Resolution of Tris(l,10-phenanthroline)chromium(III)... [Pg.198]

Chromatography with D(-l-)-lactose hydrate columns was used in the partial resolution of tris(acetylacetonato)cobalt II) complex partial resolution of [Co(acac)3], and mer- and c-[Co(bzac)3] (bzac = benzoylacetonate) is also effected by column chromatography on (H-)-lactos . The [Co(bzac)3] complex prepared from Na3[Co(C03)3] 3 H2O was separated into its mer and fac geometrical isomers by column chromatography on Florisil (Florodin Co., suj rior to alumina), prior to the resolution. For the resolution, (-l-)-lactose dried at 110 °C and then sieved to 100 mesh, and a chromatographic column (3.9 x 230 cm), which narrowed to 3.0 cm at... [Pg.65]

Optical Resolution of Tris(aminoacidato)cobalt(III)Complexes... [Pg.313]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...