Repozytorium
Wyszukaj
Kolekcje
Inne
Preparation, characterization and X-ray analysis of [Co2(Cl)2tpmc](BF4)2. Comparative structural analysis with the complexes having analogous geometries and ligans.
Autorzy
Rok wydania
2007
Czasopismo
Journal of Molecular Structure
Numer woluminu
827
Strony
80-87
DOI
10.1016/j.molstruc.2006.05.009
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
A novel binuclear Co(II) complex, [Co2(Cl)2tpmc](BF4)2 (tpmc = N,N′,N″,N‴-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane), was prepared and structurally characterized by X-ray diffraction analysis at low temperature. The complex crystallizes in P21/c space group of the monoclinic crystal system, and its crystals are isomorphic with those of [Cu2(Br)2tpmc](ClO4)2 complex. In the crystal structure the complex cations [Co2(Cl)2tpmc]2+ are settled around the inversion centres. Cobalt(II) is exo coordinated with four macrocyclic N atoms, and Cl− supplements the fifth coordination site. Based on the index of trigonality, the coordination polyhedron formed around Co(II) ion is described as distorted trigonal bipyramid. Two metal centres are at a distance of 5.710 Å. This is the first Co(II) complex for which X-ray analysis confirmed a chair conformation of tpmc ligand. IR, EPR (X-band) and UV/VIS absorption and reflectance spectra, molar conductivities and magnetic measurements (SQUID) are used to study the investigated complex. A comparative structural analysis with some of the described Co(II) and Cu(II) complexes of analogous geometries and type of pendant azamacrocyclic ligands was also done.
Słowa kluczowe
Co(II) dimeric complex, Pendant azamacrocycles, Chloro ligand, X-ray analysis, Magnetic properties
Adres publiczny
https://doi.org/10.1016/j.molstruc.2006.05.009
Strona internetowa wydawcy
Podobne publikacje
Dimeric ruthenium-triazolopyrimidine complex : synthesis and structural characterization.
Łakomska Iwona, Fandzloch Marzena, Wojtczak Andrzej
Structural characterization of pyridin-2-, -3-, and -4-yl functionalized (iminodimethanediyl)bis(phosphonic) acids : insight into the cobalt(II) and copper(II) complexes of pyridin-2-yl derivative.
Sowa Michał, Ślepokura Katarzyna, Goldeman Waldemar, Duczmal Marek, Wojciechowska Agnieszka, Matczak-Jon Ewa