Related Experiment Video
Updated: Jun 23, 2026

High Resolution Physical Characterization of Single Metallic Nanoparticles
Published on: June 28, 2019
A nonanuclear copper(II) cluster incorporating endogenous alkoxo- and exogenous hydroxo bridges containing
Sumit Khanra1, Thomas Weyhermüller, Phalguni Chaudhuri
1Max-Planck Institute for Bioinorganic Chemistry, Stiftstrasse 34-36, D-45470, Mülheim an der Ruhr, Germany.
Abstract:
A remarkable nonanuclear copper(II) complex, , with the composition [Cu9(L)4(micro3-OH)4(MeOH)2](ClO4)2, in which L is a pentadentate trianionic Schiff-base ligand with N2O3 donor atoms, has been characterized by analytical, structural and magnetochemical methods. The structure consists of four dinuclear [Cu2L]+ units linked covalently to a central copper atom by four micro3-OH, thus yielding the nonacopper core. Variable-temperature (2-290 K) magnetic susceptibility data of , have been analyzed by a "three-J" exchange coupling model (H=-2JSi.Sj), with the simulated coupling constants J'1=-189.1 cm(-1), J'2=-22.7 cm(-1), J'3=-45.7 cm(-1). A rationale for the different strength of antiferromagnetic interactions based on a comparison with those reported in the literature is forwarded.
Related Concept Videos
Valence Bond Theory
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
Aromatic Hydrocarbon Cations: Structural Overview
Removing one hydrogen from the intervening CH2 group with both...
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Coordination Number and Geometry
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...

