Cadmium oxygen ligands

The uppermost horizontal portion of Figure 2 depicts the chemical shift range of cadmium with oxygen ligands, originally determined by Maciel and Borzo (13) and soon thereafter extended by Kostelnik and Bothner-by (14) and Cardin et al. (15). The solution species have been determined by Ohtaki et al. (16a),... 

Table 3. Cadmium-113 Chemical Shifts—Oxygen Ligands...

Biirgi studied also a series of five coordinated cadmium complexes, 38, that contain three equatorial sulfur ligands, but in which the fourth and fifth, axial ligands, X and Y, are sometimes iodine, sometimes sulfur, and sometimes oxygen (84). The structural correlations have a clear interpretation in terms of the ligand exchange reaction and are reminiscent of the kind of process that is believed to occur in S 2-type nucleophilic substitution reactions ... 

Zinc and cadmium complexes of the novel tripod ligand (145) have also been described.1087 The reaction of Hg(HL)2 (HL = 2-mercaptobenzoic acid, 146) with cadmium nitrate leads to the novel CdHgL species, in which the cadmium is bonded to the carboxylate oxygen atom, and the mercury to the thiolate sulfur.1088... 

Polyaza-, polythia-ligands. Recognition of transition metal ions. Replacing the oxygen sites with nitrogen or sulphur yields macrocycles and cryptands that show marked preference for transition metal ions and may also allow highly selective complexation of toxic heavy metals such as cadmium, lead and mercury [2.41-2.44, A.14]. 

Tetrahedral and octahedral complexes of zinc, cadmium, and mercury with a wide variety of nitrogen and oxygen donor ligands have been reported. Metal complexes... 

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