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Stereoisomerism

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...

Chirality in Nature

Chirality in Nature

Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.

Structural Isomerism

Structural 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...

Chirality at Nitrogen, Phosphorus, and Sulfur

Chirality at Nitrogen, Phosphorus, and Sulfur

Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...

Crystal Field Theory - Octahedral Complexes

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...

Protein Folding

Protein Folding

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Related Experiment Video

Updated: Jun 28, 2025

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR

Published on: December 16, 2013

Chiral Transfer and Evolution in Cysteine Induced Cobalt Superstructures.

Zimo Wang¹, Xiuxiu Yin², Junjie Ba¹

¹Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun, 130012, China.

Small (Weinheim an Der Bergstrasse, Germany)

|April 12, 2024

Summary

Researchers developed a simple method to create chiral cobalt superstructures using cysteine. These structures show specific molecular recognition and electrocatalysis, offering insights into chiral transfer mechanisms.

Keywords:

OER chiral recognition chiral transfer cobalt oxides superstructure

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Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR

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Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase

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Area of Science:

Materials Science
Nanotechnology
Chemistry

Background:

Chiral organic additives can form chiral inorganic superstructures.
Complex structures hinder understanding of chiral transfer and growth mechanisms.

Purpose of the Study:

Introduce a simple hydrothermal synthesis for chiral cobalt superstructures.
Investigate chiral transfer and amplification mechanisms.
Explore molecular recognition and electrocatalytic properties.

Main Methods:

Hydrothermal synthesis using cysteine.
In situ tracking of chirality evolution.
Testing for molecular recognition and electrocatalytic activity.

Main Results:

Successfully synthesized chiral cobalt superstructures.
Demonstrated specific chiral molecule recognition.
Exhibited outstanding electrocatalytic activity.
Observed a universal formation process applicable to other metal oxides.

Conclusions:

Provided insights into chiral transfer and amplification mechanisms.
Established a versatile method for designing chiral inorganic nanomaterials.
Highlighted potential for applications in molecular recognition and electrocatalysis.