کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1340480 979737 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ferromagnetic exchange coupling in phosphonato-bridged dinuclear copper(II) compound with monoethyl (pyridyn-2-ylmethyl)phosphonate ligand (2-mpmpe): Cu2(2-mpmpe)2(H2O)2(NO3)2
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Ferromagnetic exchange coupling in phosphonato-bridged dinuclear copper(II) compound with monoethyl (pyridyn-2-ylmethyl)phosphonate ligand (2-mpmpe): Cu2(2-mpmpe)2(H2O)2(NO3)2
چکیده انگلیسی

The interaction of diethyl (pyridyn-2-ylmethyl)phosphonate (2-pmpe) with Cu(NO3)2 · 6H2O leads to a partial hydrolysis of the starting ligand and formation of the compound of the formula Cu2(2-mpmpe)2(H2O)2(NO3)2, where 2-mpmpe = monoethyl (pyridyn-2-ylmethyl)phosphonate. The crystal and molecular structure of a copper(II) compound was determined by single X-ray diffraction method. Its structure consists of five-coordinated in distorted square planar geometry (CuNO4 chromophore) copper(II) ions doubly bridged by OPO from phosphonate. The Cu⋯Cu distance is 4.69 Å. The crystal packing is determined by the interdinuclear hydrogen bond system, which leads to a three-dimensional (3D) H-bonds network. The compound was characterized by infrared, ligand field, EPR spectroscopy, and magnetic studies. The magnetic properties of the title compound investigated over the 1.8–300 K, revealed the occurrence of a weak ferromagnetic coupling through phosphonate bridge (J = 1.86 cm−1) and interdimer superexchange coupling through H-bond network (zJ′ = −0.17 cm−1). Spectroscopic and magnetic properties are presented in the light of crystal structure.

Synthesis, spectroscopic and magnetic properties, and X-ray crystal structure of dinuclear copper(II) compound of formula Cu2(2-mpmpe)2(H2O)2(NO3)2, where 2-mpmpe = monoethyl (pyridyn-2-ylmethyl)phosphonate is described. Its structure consists of copper(II) ions doubly bridged by phosphate –OPO– groups. The magnetic properties of the compound revealed the occurrence of a weak ferromagnetic coupling through phosphonate bridge (J = 1.86 cm−1) and interdimer superexchange coupling through H-bond network (zJ′ = −0.17 cm−1).Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 27, Issue 6, 25 April 2008, Pages 1721–1728
نویسندگان
, , ,