Related Experiment Video
Updated: Jun 1, 2026

Synthesis of a Water-soluble Metal–Organic Complex Array
Published on: October 8, 2016
Tetra-kis(μ-2-chloro-4-nitro-benzoato-κO:O')bis-[aqua-copper(II)]
Abstract:
In the title binuclear copper(II) complex, [Cu(2)(C(7)H(3)ClNO(4))(4)(H(2)O)(2)], each of the two independent Cu(II) center is five-coordinated by four O atoms of the carboxyl-ate groups in the basal plane and one O atom of a water mol-ecule in the apical position, in a distorted square-pyramidal geometry. The Cu-Cu distance is 2.6458 (4) Å. In the crystal structure, the dinuclear units are linked into a three-dimensional network by O-H⋯O, C-H⋯O and C-H⋯Cl hydrogen bonds. One of the Cl atoms is disordered over two positions with occupancies of 0.650 (2) and 0.350 (2).
Related Concept Videos
Coordination Number and Geometry
EDTA: Chemistry and Properties
Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Extraction: Advanced Methods
Complexometric Titration: Ligands
Formation of Complex Ions

![[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)