Zhong-Ning Chen, Huaxin Zhang, Kai-bei Yu
1998
Citations
0
Influential Citations
12
Citations
Journal
Polyhedron
Abstract
Abstract The reaction of Ni(oxen)[oxen = N , N ′-bis(2-aminoethyl)oxamido dianion], NiCl 2 and the disodium salt of EDTA (ethylenediamine tetraacetic acid) in 1:1:1 molar ratio gave the trinuclear complex [Ni 3 (oxen) 2 (en)][ClO 4 ] 2 (en = 1,2-ethylenediamine), where en came from the partial decomposition of oxen. The complex exhibits a curved Ni 3 metal arrangement with the angle Ni(2)Ni(1)Ni(2a) of 119.0°. The structure consists of a Ni 3 II unit with three nickel(II) atoms chelated and bridged by two oxamidato (oxen) groups in cis -conformation. The central nickel atom has a distorted octahedral geometry whereas the two on the sides have square-planar surroundings. The complex is paramagnetic and its magnetic behaviour can be interpreted by single-ion anisotropy with D = 5.22 cm −1 and m s = 0 singlet ground state.