Cobalt Hydrocarbonyl Research Articles

The Reaction of Epoxides with Cobalt Hydrocarbonyl and Cobalt Tetracarbonyl Anion

<b>The Reaction of Epoxides with Cobalt Hydrocarbonyl and Cobalt Tetracarbonyl Anion</b>

The Isomerization of Allyl Alcohols with Cobalt Hydrocarbonyl

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Isomerization of Allyl Alcohols with Cobalt HydrocarbonylRichard W. Goetz and Milton. OrchinCite this: J. Am. Chem. Soc. 1963, 85, 10, 1549–1550Publication Date (Print):May 1, 1963Publication History Published online1 May 2002Published inissue 1 May 1963https://doi.org/10.1021/ja00893a046RIGHTS & PERMISSIONSArticle Views301Altmetric-Citations47LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (298 KB) Get e-Alerts Get e-Alerts

A Rapid Field Test for Cobalt Carbonyl

Abstract A field spot test method has been developed to detect the presence of cobalt hydrocarbonyl and/or its decomposition products in air at the 0.1 ppm level. The sample is collected on a resin-impregnated filter which is then treated with buffer, chelating indicator, and acid. The intensity of the color developed is a function of the cobalt content on the filter. The filters are compared visually with permanent color standards.

Hydrogenations with Cobalt Hydrocarbonyl

Hydrogenations with Cobalt Hydrocarbonyl

Effects of Solvents on the Rate of Oxo Reaction of Methylacrylate

Abstract The rates of methylacrylate oxo reactions in a variety of organic solvents were measured by a batch system at 120°C. In general, the rate varies widely in the following order: alcohols &amp;gt; acetone &amp;gt; toluene; this order did not correspond with the order of their dielectric constants nor with the rates of their “base reactions” with dicobalt octacarbonyl, but it does agree with the order of their rates of formation of cobalt hydrocarbonyl under oxo conditions. tert-Butanol shows a positive but small effect on the rate as compared with toluene. When ethylene glycol and formamide having higher dielectric constants were used as solvents, the oxo reaction did not take place. On the bases of these results the mechanisms of the effects of the solvents have been discussed.

The Effect of the Partial Pressure of Carbon Monoxide and Hydrogen on the Rate of Oxo Reaction

Abstract The initial rates of the oxo reaction of methylacrylate in toluene at 100°C were measured under various partial pressures of carbon monoxide and hydrogen; they were then compared with the initial rate of the formation of cobalt hydrocarbonyl from dicobalt octacarbonyl measured under the same conditions in the preceding paper. The initial rate of the oxo reaction under the carbon monoxide pressure above 10kg./cm2 can be represented as follows: Initial rate (mol.% of aldehyde/acrylate/min.) =0.16 (PH2)1.5/(PCO) However, the initial rate decreases with the decreasing partial pressure of carbon monoxide in the range below 10 kg./cm2 of carbon monoxide. In addition, under the partial pressure of carbon monoxide below 10 kg./cm2 some behaviors of cobalt carbonyl different from that under the pressure above 10 kg./cm2 were observed. On the basis of these observations, a possible mechanism of the oxo reaction was discussed.

The Rate of Formation of Cobalt Hydrocarbonyl under Various Conditions of Oxo Reaction

Abstract By treating a solution of dicobalt octacarbonyl in toluene at 100°C under various partial pressures of carbon monoxide and hydrogen, and by determining the initial rate of formation of cobalt hydrocarbonyl, we have found that the initial rate increases with the increasing pressure of hydrogen and decreases with the increasing pressure of carbon monoxide. These effects of partial pressures on the initial rate of formation of cobalt hydrocarbonyl are parallel with the effects of partial pressures on the rate of the oxo reaction reported by Natta. In addition, the amount of cobalt hydrocarbonyl in the system during the oxo reaction of methylacrylate and cyclohexene in toluene at 120°C was determined; it was found that only a trace of cobalt hydrocarbonyl appears when acrylate is present, while a large amount of it is present even when cyclohexene is present in the system.

Heterogeneous Catalysis in Hydroformylation

THE original observers of the hydroformylation (Oxo) reaction assumed heterogeneous catalysis. Subsequent workers have attributed, either by specific hypothesis or apparent assumption, both hydroformylation and concurrent hydrogenation (of aldehyde) to homogeneous catalysis by dicobalt octacarbonyl or cobalt hydrocarbonyl. Our recent results, which indicated a heterogeneous character of hydroformylation via cobalt catalysis1, made it appropriate to wonder if hydrogenation under these conditions were not also in reality heterogeneously catalysed.

EVIDENCE FOR THE PRESENCE OF COBALT HYDROCARBONYL UNDER CONDITIONS OF THE OXO REACTION

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEVIDENCE FOR THE PRESENCE OF COBALT HYDROCARBONYL UNDER CONDITIONS OF THE OXO REACTIONM. Orchin, L. Kirch, and I. GoldfarbCite this: J. Am. Chem. Soc. 1956, 78, 20, 5450–5451Publication Date (Print):October 1, 1956Publication History Published online1 May 2002Published inissue 1 October 1956https://doi.org/10.1021/ja01601a083RIGHTS & PERMISSIONSArticle Views98Altmetric-Citations46LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (261 KB) Get e-Alerts Get e-Alerts