Cobalt complex compounds, anions

Cobalt (II) complex compounds, anions, V-nitrosohydroxyl-amine-V-sulfonato, [Co (S03-N202)3]4-, 6 121... 

Analysis of the halohydrocarbons, halocarbons, and sulfur hexafluoride is usually achieved by gas chromatography that is equipped with an electron capture detector. Complex metal anions, such as cobalt hexacyanide, are used as nonradioactive tracers in reservoir studies. The cobalt in the tracer compound must be in the complex anion portion of the molecule, because cationic cobalt tends to react with materials in the reservoir, leading to inaccurate analytic information [1226]. 

An anionic complex 30 has been synthesized from fluoride attack on Fe-(l-4-f/4-octafluorocyclohexa-l,3-diene)(CO)3] (75), and the cobalt complex 31 is the product of the reaction of perfluorocyclopentadiene with [Co2-(CO)8] (76). No subsequent chemistry of these compounds has been reported. 

---