Related Experiment Video
Updated: May 18, 2026
19:58
Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
Dibromido(6,6'-dimethyl-2,2'-bipyridine-κ(2)N,N')cadmium
Sadif A Shirvan1, Sara Haydari Dezfuli
1Department of Chemistry, Islamic Azad University, Omidieh Branch, Omidieh, Iran.
Acta Crystallographica. Section E, Structure Reports Online
|September 13, 2012
Summary
This study details the crystal structure of a cadmium(II) compound featuring a 6,6'-dimethyl-2,2'-bipyridine ligand. The structure reveals a distorted tetrahedral geometry with hydrogen bonds and pi-pi stacking interactions.
Area of Science:
- Coordination Chemistry
- Crystal Engineering
- Materials Science
Background:
- Bipyridine ligands are crucial in coordination chemistry for forming metal complexes.
- Understanding the supramolecular assembly of metal-organic compounds is key to designing new materials.
- Cadmium(II) complexes exhibit diverse coordination geometries and potential applications.
Purpose of the Study:
- To synthesize and characterize a novel cadmium(II) complex with a substituted bipyridine ligand.
- To elucidate the coordination environment and crystal packing of the [CdBr2(6,6 ext ext-dimethyl-2,2 ext ext-bipyridine)] compound.
- To investigate the intermolecular interactions governing the solid-state structure.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
- The coordination geometry around the cadmium(II) center was analyzed.
- Intermolecular interactions, including hydrogen bonding and pi-pi stacking, were identified and quantified.
Main Results:
- The cadmium(II) ion is four-coordinated, adopting a distorted tetrahedral geometry.
- The coordination sphere consists of two nitrogen atoms from the 6,6 ext ext-dimethyl-2,2 ext ext-bipyridine ligand and two terminal bromide ions.
- Crystal structure analysis revealed the presence of C-H⋯Br hydrogen bonds and π-π stacking interactions between pyridine rings with a centroid-centroid distance of 3.763(5) Å.
Conclusions:
- The synthesis resulted in the formation of a discrete cadmium(II) complex with a specific coordination environment.
- The crystal packing is stabilized by a combination of hydrogen bonding and π-π interactions, influencing the overall supramolecular architecture.
- This study contributes to the understanding of structure-property relationships in cadmium(II) coordination compounds.
More Related Videos
05:21The Effect of Ultraviolet Radiation on the Chemical Bath Deposition of Bis(thiourea) Cadmium Chloride Crystals and the Subsequent CdS Obtention
Published on: August 30, 2018
09:12Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures
Published on: August 10, 2017
Related Concept Videos
02:42Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
02:57Coordination Number and Geometry
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
02:51Metal-Ligand Bonds
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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...
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...
01:18Aromatic Hydrocarbon Cations: Structural Overview
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...
Removing one hydrogen from the intervening CH2 group with both...
02:34Structural Isomerism
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
![[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2Ffiles%2Fmedia%2Fscience-education%2Fscience-education-thumbs%2F12417.jpg&w=3840&q=75)
01:16[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.