Cobalt bromide-silica

A PRP -1 (Hamilton Reno, NV) reversed phase column was coated with cetylpyridinium and eluted with tetramethylammonium salicylate acetoni-trile water.89 The separation was comparable to that observed on conventional ion exchange. Coated phases were also used to separate oxalate complexes of manganese, cobalt, copper, and zinc.90 Reversed phase silica supports were coated with poly(N-ethyl-4-vinylpyridinium bromide), poly(dimethydiallylammonium chloride), poly(hexamethyleneguanidinium... 

Surface complexation to form a tetrahedral Co(L)X2 species is proposed to account for the adsorption of cobalt(II) chloride and bromide from acetone and ethanol solution onto silica gel modified with 3-amino-1,2,4,-triazole,526 supported by electronic and ESR spectroscopy. 

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