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Related Concept Videos

Prochirality02:05

Prochirality

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The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
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Stereoisomerism02:52

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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...
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Stereoisomerism of Cyclic Compounds02:33

Stereoisomerism of Cyclic Compounds

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In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
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Molecules with Multiple Chiral Centers02:25

Molecules with Multiple Chiral Centers

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Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...
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Chirality in Nature02:30

Chirality in Nature

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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.
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Chirality02:25

Chirality

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Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
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Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
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Chirality sensing with stereodynamic copper(I) complexes.

Zeus A De Los Santos1, Nicholas M Legaux1, Christian Wolf1

  • 1Department of Chemistry, Georgetown University, Washington, D.C., USA.

Chirality
|September 14, 2017
PubMed
Summary

Chiral copper(I) complexes enable sensitive detection of molecular chirality. This method accurately determines enantiomeric excess and absolute configuration using circular dichroism signals, offering a fast, high-throughput sensing solution.

Keywords:
absolute configurationamino acidschiral amplificationcircular dichroismdiaminesenantiomeric excess

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Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
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Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
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Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides

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Area of Science:

  • Coordination Chemistry
  • Chiral Sensing
  • Spectroscopy

Background:

  • Chirality is crucial in pharmaceuticals and materials science.
  • Developing efficient chiral sensing methods is essential for analysis.
  • Copper(I) complexes offer unique photophysical properties for sensing applications.

Purpose of the Study:

  • To synthesize novel Cu(I) complexes with stereodynamic diphosphine ligands.
  • To investigate the use of these complexes for chiral sensing of diamines and amino acids.
  • To establish a method for determining absolute configuration and enantiomeric excess.

Main Methods:

  • Synthesis of three Cu(I) complexes featuring stereodynamic diphosphine ligands.
  • Coordination of chiral analytes (diamines, amino acids) to the Cu(I) complexes.
  • Measurement of circular dichroism (CD) signals to monitor analyte binding.

Main Results:

  • Distinct CD signals were generated upon coordination of analytes.
  • The chiroptical sensor response allowed for the determination of absolute configuration.
  • Enantiomeric excess of analytes could be quantified at low concentrations.

Conclusions:

  • The developed Cu(I) complexes serve as effective chiroptical sensors.
  • The sensing method is simple, fast, and suitable for high-throughput applications.
  • This approach provides a valuable tool for chiral analysis.