Cobalt(II) naphthenate

Cobalt(II) naphthenate is a mixture of cobalt(II) derivatives of naphthenic acids. Cobalt Naphthenate is a cobalt source that is soluble in organic solvents as an organometallic compound (also known as metalorganic, organo-inorganic and metallo-organic compounds). Cobalt naphthenate is the cobalt salt of naphthenic acids. Naphthenic acids are a complex group of carboxylic acids with the general formula C, HZ~+~O~, where n indicates the carbon number and Z specifies the hydrogen deficiency resulting from ring formation. Cobalt naphthenate is thus a member of the metal carboxylates group. All of the metal carboxylate salts are designed to add metals to chemical reactions. They therefore are expected to dissociate into free metal and free acid. The high purity acetylacetonate anion complexes by bonding each oxygen atom to the metallic cation to form a chelate ring.Because of this property, Cobalt Naphthenate is commonly used in various catalysts and catalytic reagents for organic synthesis. These coordination complexes are widely used as oil drying agents for the autoxidative crosslinking of drying oils. Metal naphthenates are not well defined in conventional chemical sense that they are mixtures. They are widely employed catalysts because they are soluble in the nonpolar substrates, such as the alkyd resins or linseed oil. The fact that naphthenates are mixtures helps to confer high solubility. A second virtue of these species is their low cost. A well-defined compound that exhibits many of the properties of cobalt naphthenate is the cobalt(II) complex of 2-ethylhexanoic acid. Often in technical literature, naphthenates are described as salts, but they are probably also non-ionic coordination complexes with structures similar to basic zinc acetate.Cobalt naphthenate is used primarily in unsaturated polyester resins, paint drier applications and rubber adhesion promotion in the tire industry. One characteristic of cobalt naphthenate and other metal carboxylates is that they readily dissociate from an ion pair into free metal and free acid. They are found as partially dissociated products in the ambient environment (i.e., neutral pH). Dissociation is a reversible process and the proportion of dissociated salt is dependent on the pH and pKa (the dissociation constant), which is the pH at which 50% dissociation occurs. In the low pH environment of the digestive tract 3 (e.g., pH 1.2) complete dissociation will occur for these metal carboxylates. The transport and’bioavailability of the metals and acids are determined by their solubility in environmental media and biological fluids which is determined by environmental parameters such as pH. Dissociation is a reversible reaction, splitting the parent compound into two or more chemical species which may be ionic, but are not necessarily so. The processcan be generally represented as: