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Crystal structure and spectroscopic properties of [Zn(2-qmpe)Cl2] containing diethyl (quinolin-2-ylmethyl)phosphonate ligand (2-qmpe)

Żurowska B., Białońska A., Kotyński A., Ochocki J.

Materials Science Poland

2010

Vol. 28, No. 2

573--581

The crystal structure of [Zn(2-qmpe)Cl2] (2-qmpe, diethyl (quinolin-2-ylmethyl) phosphonate) ligand) was determined by X-ray-diffraction. The compound was also characterized by IR, far-IR, 1H and 31P NMR spectroscopy. In the molecule, 2-qmpe acts as a bidentate N,O-chelate ligand. Tetrahedral ZnNOCl2 environment of Zn(II) atom is slightly distorted. The structure is stabilized by intermolecular H bond and n---n interactions. The spectral features are in agreement with the structural data.

Coordination properties of the diethyl (pyridin-3-ylmethyl)phosphonate ligand (3-pmpe) with nitrate transition metal salts

Żurowska B., Kotyński A., Ochocki J.

Materials Science Poland

2009

Vol. 27, No. 4/1

999--1007

A new series of nitrate transition metal complexes containing diethyl(pyridin-3-ylmethyl)phosphonate (3-pmpe) as a ligand, having a general formula [M(3-pmpe)2(H2O)2](NO3)2 (M = Cu, Co and Ni) and [Zn(3-pmpe)2](NO3)2 were prepared. The complexes were identified and characterized by the elemental analysis, spectroscopic and magnetic studies. Ligands containing two donor atoms, heterocyclic nitrogen and phosphoryl oxygen atoms bind in a bidentate bridging manner via the pyridine nitrogen and the phosphoryl oxygen atoms. The magnetic behaviour in the temperature range 1.8-300 K) of the Cu(II), Ni(II), Co(II) complexes as well as their spectroscopic properties suggest polymeric structure of all complexes and the existence of a weak antiferromagnetic exchange coupling between paramagnetic centres inside the dibridged linear chains [M(3-pmpe)2M]n.