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Description
TCI E0768 trans-4-Ethylcyclohexanol is an aliphatic cyclic alcohol carrying an ethyl group and a hydroxyl group arranged in a trans relationship on the cyclohexane ring. This geometric isomeric purity is precisely what makes it a valuable building block, because in the chair conformation both substituents can occupy equatorial positions simultaneously, giving the molecule an elongated and relatively rigid shape. In the laboratory, the compound serves as a starting material for constructing molecules that demand a specific three-dimensional geometry, particularly in liquid crystal materials research and in directed organic synthesis.
The property that makes it a preferred choice is the secondary hydroxyl group, which can be converted into a wide range of other functional groups through esterification, etherification, oxidation to the ketone, tosylation, or substitution to the corresponding halide. Each of these transformations can be carried out while the trans configuration on the ring is preserved, so that the shape of the final product molecule remains under control. Uniform trans configuration matters greatly in liquid crystal materials, because the regularity of molecular shape determines phase transition temperatures, rotational viscosity, and the stability of the mesomorphic phase that forms.
In Indonesian laboratories, this compound is typically drawn on in university and institutional research settings where defined molecular geometry is part of the experimental design. It suits synthetic chemistry groups preparing intermediates on a research scale, materials science work on mesogenic systems, and method development where a stereochemically defined cyclohexane scaffold is needed as a reference or starting point for further functionalisation.
Laboratory Applications
- Liquid crystal materials research: the uniform trans configuration gives the elongated, rigid molecular shape that governs phase transition temperature, rotational viscosity, and mesomorphic phase stability in candidate mesogens.
- Directed organic synthesis: the compound provides a stereochemically defined cyclohexane scaffold, allowing chemists to build target molecules whose three-dimensional geometry must be controlled from the very first step.
- Ester intermediate preparation: the secondary hydroxyl group undergoes esterification readily, and the trans ring configuration is retained, so the geometry of the resulting ester remains predictable and reproducible.
- Ether and tosylate synthesis: etherification and tosylation both proceed at the hydroxyl group, giving access to activated intermediates for further substitution while leaving the trans ring relationship intact.
- Oxidation and halide substitution studies: conversion of the secondary alcohol to the corresponding ketone or halide makes this a convenient substrate for functional group interconversion work on a conformationally rigid ring.
Specifications
- Brand: TCI (Tokyo Chemical Industry)
- CAS number: 19781-62-5
- Category: Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
- Product code: E0768
- Pack sizes: research and laboratory pack sizes as listed by the manufacturer; please confirm the available size when ordering
- Storage: store as indicated on the manufacturer's label and safety data sheet
Handling and Storage
Store the container in a cool, dry, well-ventilated place away from heat, open flame, and direct sunlight, and follow the storage conditions stated on the manufacturer's label and safety data sheet. Keep the material in its original tightly closed container, or in a chemically compatible glass container with a secure closure, and label it clearly. Handle in a fume hood, wearing safety glasses, gloves, and a laboratory coat, and avoid contact with skin, eyes, and clothing as well as breathing any vapour. Keep the container closed when not in use to limit moisture uptake and evaporative loss, store separately from strong oxidising agents, and dispose of residues and contaminated material in accordance with applicable laboratory waste procedures. Consult the safety data sheet before first use.
