Rhodium hydroxo-, dithionate

RhHisN40gS2, Rhodium(III), tetraammine-aquahydroxo-, cis-, dithionate, 24 225 RhN3S,3H 2, Rhodate(ni), tris(pentasul-fido)-, triammonium, 21 15 RhN40giiC4H,9, Rhodium(III), aquatris(l,2-ethanediamine)hydroxo-, dithionate, 24 230... 

The starting material for the preparation of the bromide salt of di-p.-hydroxo-bis[tetraamminerhodium(III)] diol) is the crude dithionate salt, which is obtained by heating ds-tetraammineaqua(hydroxo)rhodium(III) dithionate at 120°. In order to avoid contamination of the bromide with mono-hydroxo bridged monool) species, it is necessary to keep dissolution times and, where possible, temperature to a minimum. 

The cw-aquabis( 1,2-ethanediamine)(hydroxo)rhodium(III) cation has been isolated previously as the dithionate and perchlorate salts. The preparative procedure described here is essentially that described in Reference 6 for the dithionate. 

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