Related Experiment Video
Updated: Feb 11, 2026
10:37
Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
11.8K
Unusual Fluorenylidene-philic Interactions for Effective Conformational Induction
1Materials Chemistry Laboratory Korea Institute of Science and Technology Seoul 136-791 (Korea) Fax: (+82) 2-958-5089.
Angewandte Chemie (International Ed. in English)
|May 2, 2018
Summary
Researchers controlled the shape of a fluorenylidene group using platinum complexes. Axial ligands influenced the fluorenylidene moiety
Area of Science:
- Organometallic Chemistry
- Coordination Chemistry
- Materials Science
Background:
- Platinum complexes are crucial in catalysis and materials science.
- Controlling molecular conformation is key to tuning material properties.
- The 9-fluorenylidenemalonate (fm) ligand offers potential for conformational control.
Purpose of the Study:
- To investigate the conformational control of the 9-fluorenylidenemalonate (fm) moiety in platinum complexes.
- To understand the role of axial ligands in inducing specific conformations.
- To explore the synthesis of novel platinum(IV) complexes with tunable fm conformations.
Main Methods:
- Synthesis of platinum(II) and platinum(IV) complexes.
- Characterization using spectroscopic techniques (NMR, IR).
- Analysis of structural changes and conformational preferences.
Main Results:
- Achieved control over the fluorenylidene moiety conformation via intramolecular interactions.
- Demonstrated that axial ligands dictate the fm conformation during platinum complex formation.
- Established a hierarchy of ligand-induced conformational control: OOCCH3 > OCH3 > OH.
Conclusions:
- Intramolecular interactions in platinum complexes enable precise conformational control of the fluorenylidene moiety.
- Axial ligand 'philicity' is a key factor in directing the conformation of the 9-fluorenylidenemalonate ligand.
- This study provides a pathway for designing platinum complexes with tailored structural and electronic properties.
Related Concept Videos
01:20Conformity
48.2K
Conformity is the change in a person’s behavior to go along with the group, even if that person does not agree with the group.
48.2K
01:16Unusual Results
3.9K
Unusual results are those that have a very low chance of occurring. Unusual results can be identified using probabilities and the range rule of thumb. In problems involving probability, unusual results can be observed in 2 instances – an unusually high number of successes or an unusually low number of successes.
According to the range rule of thumb, any value above or below two standard deviations, 2σ from the mean, μ is considered unusual.
Maximum unusual value =...
According to the range rule of thumb, any value above or below two standard deviations, 2σ from the mean, μ is considered unusual.
Maximum unusual value =...
3.9K
01:07z Scores and Unusual Values
11.1K
The z score is one of the three measures of relative standing. It describes the location of a value in a dataset relative to the mean. z scores are obtained after the standardization of the values in a dataset. The z score for the mean is 0.
This score indicates how far a value is from the mean in terms of standard deviation. For example, if a data value has a z score of +1, the researcher can infer that the particular data value is one standard deviation above the mean. If another data...
This score indicates how far a value is from the mean in terms of standard deviation. For example, if a data value has a z score of +1, the researcher can infer that the particular data value is one standard deviation above the mean. If another data...
11.1K
01:27Inductive Effects on Chemical Shift: Overview
2.2K
The protons in unsubstituted alkanes are strongly shielded with chemical shifts below 1.8 ppm. Methine, methylene, and methyl protons appear at approximately 1.7, 1.2 and 0.7 ppm, while the proton signal from methane appears at 0.23 ppm. An electronegative substituent, such as chlorine, withdraws the electron density from the protons, increasing their chemical shift. Progressive substitution of the hydrogens in methane by chlorine shifts the proton signals increasingly downfield, to 3.05 ppm in...
2.2K
02:20Conformations of Butane
18.2K
Unlike ethane and propane that have only two major conformations, butane has more than two conformers. The staggered form of butane in which the bulky methyl groups on the two carbons are placed on opposite sides, that is, at a dihedral angle of 180°, is the lowest energy, most stable form — called the anti conformer. This conformation is stabilized due to the absence of steric repulsion between the largely spaced out methyl groups. The other two staggered conformations are...
18.2K
02:29Conformations of Cycloalkanes
14.7K
Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3 hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...
14.7K