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Updated: Jun 5, 2026

Rapid One-step Enzymatic Synthesis and All-aqueous Purification of Trehalose Analogues

Rapid One-step Enzymatic Synthesis and All-aqueous Purification of Trehalose Analogues

Published on: February 17, 2017

A polymorph of terephthalaldehyde.

Lei Teng¹, Zhiguo Wang

¹School of Chemical and Materials Engineering, Huangshi Institute of Technology, Huangshi 435003, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online

|January 5, 2011

Summary

This summary is machine-generated.

Researchers discovered a new orthorhombic polymorph of terephthalaldehyde. This new form, stable at lower temperatures, transforms into the known monoclinic form at room temperature.

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Area of Science:

Crystallography
Solid-state chemistry

Background:

Terephthalaldehyde is an organic compound with industrial applications.
Polymorphism, the ability of a solid material to exist in more than one crystal form, is common in organic molecules.

Purpose of the Study:

To synthesize and characterize a new polymorph of terephthalaldehyde.
To investigate the structural differences and phase transition behavior between polymorphs.

Main Methods:

Recrystallization from ethanol to obtain new crystals.
Melting point determination to characterize thermal properties.
X-ray crystallography to elucidate crystal structures (implied).

Main Results:

A new orthorhombic polymorph of terephthalaldehyde was successfully synthesized.
The orthorhombic polymorph has a melting point of 372 K.
At room temperature, the orthorhombic form transforms into the known monoclinic polymorph (melting point 389 K).
Structural analysis reveals the absence of C-H⋯O hydrogen bonds in the orthorhombic form, unlike the monoclinic form.

Conclusions:

A novel orthorhombic polymorph of terephthalaldehyde exists.
The orthorhombic polymorph is metastable relative to the monoclinic form at room temperature.
The presence or absence of specific intermolecular interactions, like C-H⋯O bonds, can distinguish between polymorphs.