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Published on: February 20, 2020
Extraction and spectrophotometric determination of cobalt(II) with isonitroso-5-methyl-2-hexanone
S B Jadhav1, S P Tandel, S P Malve
1Department of Inorganic Chemistry, The Institute of Science, 15 Madam Cama Road, Mumbai 400 032, India.
Abstract:
A simple and selective method is proposed for the extraction of cobalt(II) for its spectrophotometric determination using (HIMH) as an extractant. Cobalt(II) forms a yellow coloured complex with HIMH which can be extracted into chloroform. The calibration curve is rectilinear in the concentration range 0.1-5.0 mug ml(-1) of cobalt(II). The extracted species shows an absorption maximum at 400 nm with molar absorptivity of 1.135x10(4) l mol(-1) cm(-1). The method has been applied for the determination of cobalt in synthetic mixtures, pharmaceutical, biological and high speed steel samples.
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Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...

