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Free Radicals in Chemical Biology: from Chemical Behavior to Biomarker Development

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Cholest-5-en-7-one.

Mohd Shaheen Khan, Othman Sulaiman, Rokiah Hashim

Acta Crystallographica. Section E, Structure Reports Online

|May 19, 2011

Summary

This study details the molecular structure of a C(27)H(44)O compound, revealing specific ring conformations like chair and envelope. Crystal analysis shows molecules stacked along the a axis without significant intermolecular interactions.

Area of Science:

Organic Chemistry
Crystallography
Molecular Structure

Background:

Understanding the three-dimensional structure of organic molecules is crucial for predicting their properties and reactivity.
The deca-hydro-phenanthrenone scaffold is a complex polycyclic system found in various natural products and synthetic compounds.

Purpose of the Study:

To elucidate the precise three-dimensional conformation of the deca-hydro-phenanthrenone ring system in the title compound, C(27)H(44)O.
To analyze the crystal packing and intermolecular interactions of the compound.

Main Methods:

Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
Conformational analysis of the individual rings within the deca-hydro-phenanthrenone system was performed.

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Main Results:

The two cyclohexane rings within the deca-hydro-phenanthrenone core adopt chair conformations.
The cyclohexene ring exhibits an envelope conformation, and the cyclopentane ring is found to be twisted.
In the solid state, molecules are arranged in stacks along the a axis, with no notable intermolecular interactions observed.

Conclusions:

The study provides a detailed conformational description of a complex polycyclic organic molecule.
The crystal structure reveals a packing arrangement devoid of significant intermolecular forces, suggesting potential implications for material properties or reactivity in the solid state.