| Inorganica Chimica Acta | onAcademic

来自 : www.onacademic.com/detail/jour 发布时间：2021-03-24

Author: Ning Chen Zhong Qiu Jun Xia Tang Wen Bai Yu Kai

Journal: Inorganica Chimica Acta

Issue Date: 1994

Abstract(summary):
The complex polymer [Cu2(oxen)(pym)2]n(ClO4)2n, where oxen and pym are N, N -(2-aminoethyl)oxamide dianion and pyrimidine, respectively, was synthesized and characterized by means of X-ray crystallography, magnetic and spectroscopic measurements. It crystallizes in the monoclinic system, space group P21/c, Z = 4 with a = 8.143(2), b = 8.646(3), c = 16.787(5) and = 97.35(2) . The crystal structure of this compound consists of layers of a two-dimensional network arrayed along the a axis. Inside the layer, trans-oxamidato-bridged copper(II) dimers connected by pyrimidine in an asymmetric fashion spread out along the bc plane to form a 2D infinite network. The copper(lI) has a square-pyramidal environment with N3O atoms forming the basal plane and a nitrogen atom from pyrimidine occupying the apical site. The magnetic study of this compound shows a strong antiferromagnetic exchange interaction with J = 582 cm 1, due to the efficiency of the oxamidato bridge in undergoing antiferromagnetic coupling between the copper(II) atoms which are separated by about 5.2 .

Page: 171-176


The magnetic study of this compound shows a strong antiferromagnetic exchange interaction with J = −582 cm−1, due to the efficiency of the oxamida...onAcademic ；Science；Technology；Medicine；researchThe complex polymer [Cu2(oxen)(pym)2]n(ClO4)2n, where oxen and pym are N, N′-(2-aminoethyl)oxamide dianion and pyrimidine, respectively, was synthesized and characterized by means of X-ray crystallography, magnetic and spectroscopic measurements. It crystallizes in the monoclinic system, space group P21/c, Z = 4 with a = 8.143(2), b = 8.646(3), c = 16.787(5) Å and β = 97.35(2)°. The crystal structure of this compound consists of layers of a two-dimensional network arrayed along the a axis. Inside the layer, trans-oxamidato-bridged copper(II) dimers connected by pyrimidine in an asymmetric fashion spread out along the bc plane to form a 2D infinite network. The copper(lI) has a square-pyramidal environment with N3O atoms forming the basal plane and a nitrogen atom from pyrimidine occupying the apical site. The magnetic study of this compound shows a strong antiferromagnetic exchange interaction with J = −582 cm−1, due to the efficiency of the oxamidato bridge in undergoing antiferromagnetic coupling between the copper(II) atoms which are separated by about 5.2 Å.