3275a.     STERNBERG, H. W., WENDER, I., AND ORCHIN, M.  Analysis of Mixtures of Dicobalt Octacarbonyl and Cobalt Carbonyl Anion.  Anal. Chem., vol. 24, 1952, p. 174-176.

          Study of the hydroformylation (Oxo) process in the laboratory required the analysis of mixtures containing both dicobalt octacarbonyl, [Co)(CO₄]₂, and Co carbonyl anion, [Co(CO)₄]-, the latter being present either as Co hydrocarbonyl, HCo(CO)₄, or as a Co salt.  Because no method was available for this purpose, the authors devised the present procedure.  The 2-step method depends on the decomposition of all corbonyls, by treatment with I, to yield CO; and the selective precipitation of the anion by Ni o-phenanthroline chloride, followed by decomposition of the precipitate with liberation of CO.  As the determination is based on a gasometric procedure, it is suited for the analysis of mixtures, such as those from the hydroformylation reaction, which may contain Co salts and metallic Co.

         STERNBERG, H. W., WENDER, I., FRIEDEL, R. A., AND ORCHIN, M.  Chemistry of the Metal Carbonyls.  II.  Preparation and Properties of Cobalt Hydrocarbonyls.  See abs. 3656b.

         ----------.  Chemistry of the Metal Carbonyls.  III.  Reaction Between Dicobalt Octacarbonyl and Dimethylamine.  See abs. 3656c.

         STERNBERG, J. C.  See abs. 154.

         STERNINA, D. G.  See abs. 2757.

         STEVENS, N. P.  See abs. 175.

         STEVENSON, E. P.  See abs. 2988.

         STEWART, L.  See abs. 2601.