Cobalt dithionate, trans-, monohydrate

BrCoN407S2C4His - H20, Cobalt(m), aqua-bromobis(l,2-ethanediamine)-, dithionate, trans-, monohydrate, 21 124 Br2N4PdCi2H30, Palladium(D), [Af V-bis[2-(di-methylamino)ethyl]-iV -dimethyl-1,2-ethanediamine]bromo-, bromide, 21 131... 

C1CoN407S2C4H,8 HjO, Cobalt(HI), aquachlo-robis( 1,2-ethanediamine)-, dithionate, trans-, monohydrate, 21 125 ClF8nCl2H2, Thallium(III), chlorobis(2,3,4,6-tetrafluorophenyl-), chlorobis(2,3,5,6-tetra-fluorophenyl)-, 21 73... 

In addition to the cis and trans dibromo complexes, the syntheses of c/s-aqua-bromobis(l,2-ethanediamine)cobalt(III) dibromide monohydrate and trans-aquabromobis(l,2-ethanediamine)cobalt(III) dithionate monohydrate are described. It is of historical interest that of the hundreds of cis/trans isomeric pairs of diacidobis(l,2-ethanediamine)cobalt(III) complexes known to Werner,3 the trans isomers in the classical aquahalo series eluded him. The procedures described here for their isolation are a modification of much later works, 8 in which the more soluble trans complexes were obtained pure as their sulfate salts by fractional crystallization of cis/trans mixtures. The syntheses of cis-[Co(en)2(OH2)Cl]S04-2H201-9 and ds-[Co(en)2(0H2)Cl]Br2"H209 are described in previous volumes of this series. The preparation of frans-aquachloro-bis(l, 2-ethanediamine)cobalt(III) dithionate monohydrate is given here to complete the series. 

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