Coordination Chemistry of Corrosion-Inhibitors of the Benzotriazole Type - Preparation and Characterization of Cobalt(Ii) Complexes with 1-Methylbenzotriazole (Mebta) and the Crystal-Structures of [Cocl2(Mebta)2], Trans-[Co(Ncs)2(Mebta)4], Trans-[Co(Ncs)2(Meoh)2(Mebta)2] and Cis-[Co(No3)2(Mebta)2] (EN)

Plakatouras, J. C. (EN)

Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας (EL)

Plakatouras, J. C. (EN)

An inorganic model approach to the corrosion inhibition of metals by benzotriazoles has been initiated. The preparation and characterization of monomeric cobalt(II) complexes of the types [CoX2(Mebta)2] (X = Cl, Br, NCS, NO3), (MebtaH)[CoCl3(Mebta)], (MebtaH)2[CoCl4], [Co(NCS)2(Mebta)4], [Co(NCS)2(MeOH)2(Mebta)2] and [Co(NO3)2 L2(Mebta)2] (L = H2O, MeOH), where Mebta = 1-methylbenzotriazole, are described. Four representative complexes have been structurally characterized by single-crystal X-ray diffraction studies; [CoCl2(Mebta)2] (1), trans-[Co(NCS)2(Mebta)4] (5), trans-[Co(NCS)2 (MeOH)2(Mebta)2] (6) and cis-[Co(NO3)2(Mebta)2] (8). Mebta acts as a monodentate ligand binding through N(3). The geometry about cobalt in 1 is tetrahedral, while complexes 5, 6 and 8 have octahedral stereochemistries. The new complexes were also characterized by elemental and thermogravimetric analyses, conductivity measurements, variable-temperature magnetochemistry and spectroscopic (IR, ligand field, low-temperature ESR) methods. The data are discussed in terms of the nature of bonding and known structures. (EN)

high-spin cobalt(ii) (EN)

University of Ioannina

Repository of UOI Olympias

Σχολή Θετικών Επιστημών

Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

ΑΠΟΘΕΤΗΡΙΟ "ΟΛΥΜΠΙΑΣ"

Τμήμα Χημείας

Polyhedron (EN)

English

1992

<Go to ISI>://A1992JX12800013

http://olympias.lib.uoi.gr/jspui/handle/123456789/10213

Pergamon Press Ltd. (EN)