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Issue 12, 2017
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5-(2-Pyridil)-1H-tetrazole complexes with Mo(IV) and W(IV) cyanides

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The reactions of tetrazole ligand derived from 2-cyanopyridine with K3Na[Mo(CN)4O2]·6H2O and K3Na[W(CN)4O2]·6H2O in water–ethanol solution result in isolation of two new complexes with the following formulae: (PPh4)2[Mo(CN)3O(pdt)]·2H2O (1) (Hpdt = 5-(2-pyridil)-1H-tetrazole) and (PPh4)2[W(CN)3O(pdt)]·3H2O (2). The complexes were characterized by elemental analysis, single crystal X-ray structure measurements, IR and UV-Vis spectroscopy, cyclic voltammetry measurement as well as thermogravimetric measurement. The X-ray crystal structure measurements indicated the presence of two coordination isomers in a single crystal. The pyridine nitrogen occupies both trans and/or cis position to the M[double bond, length as m-dash]O bond, which is explained by similar pK of pyridine and tetrazole nitrogen. The DTG measurements indicate the stabilization of tetrazole upon coordination.

Graphical abstract: 5-(2-Pyridil)-1H-tetrazole complexes with Mo(iv) and W(iv) cyanides

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The article was received on 30 Dec 2016, accepted on 14 Feb 2017 and first published on 14 Feb 2017

Article type: Paper
DOI: 10.1039/C6DT04908G
Citation: Dalton Trans., 2017,46, 4030-4037
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    5-(2-Pyridil)-1H-tetrazole complexes with Mo(IV) and W(IV) cyanides

    A. Mrowiec, A. Jurowska, M. Hodorowicz and J. Szklarzewicz, Dalton Trans., 2017, 46, 4030
    DOI: 10.1039/C6DT04908G

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