Tetraaquabis[5-(4-pyridyl N-oxide)tetrazolato-N2]cadmium: the intermediate in the synthesis of a tetrazole from a nitrile and an azide
The intermediate [Cd(4-PTZ)2(H2O)4] [4-PTZ is 5-(4-pyridyl N-oxide)tetrazolate, C6H4N5O], (I), in the synthesis of 4-HPTZ, (II), from the cycloaddition reaction of 4-cyanopyridine N-oxide with NaN3 in water using CdCl2 as catalyst, was structurally characterized. The unique Cd atom lies on a twofold axis and the coordination geometry of the Cd atom is that of a slightly distorted octahedron, involving four water molecules and two tetrazolate ligands. The catalytic role of the Cd2+ ion in the tetrazole generation reaction stems from the formation of (I). In acidic solution, (I) can be disassociated and the free ligand, (II), can be released.
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Document Type: Research Article
Publication date: 2004-04-01