Related Experiment Video
Updated: Jun 5, 2026

06:40
Synthesis of a Water-soluble Metal–Organic Complex Array
Published on: October 8, 2016
Hexakis(dimethyl sulfoxide-κO)chromium(III) trichloride
Acta Crystallographica. Section E, Structure Reports Online
|January 5, 2011
Summary
The crystal structure of a new chromium(III) compound with dimethyl sulfoxide ligands was determined. This research details its coordination geometry and intermolecular hydrogen bonding interactions.
Area of Science:
- Inorganic Chemistry
- Crystallography
- Coordination Chemistry
Background:
- Dimethyl sulfoxide (DMSO) is a versatile ligand in coordination chemistry.
- Chromium(III) complexes exhibit diverse structural and electronic properties.
Purpose of the Study:
- To characterize the crystal structure of a novel chromium(III) complex with dimethyl sulfoxide.
- To investigate the coordination environment around the chromium ion and analyze crystal packing.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
- Structural parameters, including bond lengths and angles, were analyzed.
Main Results:
- The compound features a central Cr(III) ion coordinated by six dimethyl sulfoxide ligands in a slightly distorted octahedral geometry.
- Chromium-oxygen bond lengths range from 1.970(2) to 1.972(2) Å.
- Chloride anions participate in weak C-H⋯Cl hydrogen bonds, stabilizing the crystal lattice.
Conclusions:
- The study provides a detailed structural analysis of the [Cr(DMSO)6]Cl3 complex.
- The observed hydrogen bonding network plays a crucial role in the overall crystal structure stabilization.
More Related Videos
Related Concept Videos
Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Hybridization of Atomic Orbitals II
sp3d and sp3d 2 Hybridization
Formation of Complex Ions
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
Crystal Field Theory - Octahedral Complexes
Crystal Field Theory
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...
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...
Coordination Compounds and Nomenclature
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
Properties of Transition Metals
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.

