4,5-Methylenedithio-1,3-dithiole-2-thione TCI M1112

TCI M1112 is 4,5-Methylenedithio-1,3-dithiole-2-thione, a sulfur-rich heterocyclic compound recognised as an important precursor in functional materials chemistry. The 1,3-dithiole-2-thione framework is a classic starting point for constructing tetrathiafulvalene systems, the family of electron-donor molecules that forms the foundation of research into organic conductors and charge-transfer materials. The additional methylenedithio bridge at the four and five positions enriches the structure with further sulfur atoms, so this molecule is frequently chosen when researchers wish to strengthen the interactions between stacked molecules. In the laboratory it serves as a specialised building block that common reagents cannot readily replace.

The property that makes this compound attractive is the high density of sulfur atoms packed into a single small molecule. Those sulfur atoms carry easily polarisable orbitals and are able to form intermolecular sulfur–sulfur contacts, an interaction that strongly determines the conduction pathways within crystals of organic materials. The thione group at the two position is reactive and can be converted into a ketone group or joined through coupling reactions to produce symmetrical tetrathiafulvalene systems. This combination of a reactive handle and an extended sulfur framework gives synthetic chemists a dependable entry point into donor molecule design.

In Indonesian laboratories, material of this kind is typically handled by university research groups and institutional laboratories working on organic electronic materials, synthetic heterocyclic chemistry, and postgraduate thesis projects. Because it is a specialised building block rather than a general-purpose reagent, it is usually ordered in the small quantities appropriate to exploratory synthesis, then stored carefully so that a single pack can support several rounds of experimental work over an extended research programme.

• Tetrathiafulvalene synthesis: the 1,3-dithiole-2-thione core is the classic starting framework for building TTF systems, making this compound a direct entry point for donor molecule preparation.
• Organic conductor research: the extended sulfur framework supports the intermolecular sulfur–sulfur contacts that define conduction pathways in crystals of organic conducting materials under investigation.
• Charge-transfer material development: as an electron-donor precursor, it allows researchers to assemble the donor components required for charge-transfer systems studied in functional materials chemistry.
• Heterocyclic building block chemistry: the reactive thione group at the two position can be converted to a ketone or coupled, giving synthetic flexibility to heterocyclic route design.
• Molecular stacking studies: the additional methylenedithio bridge introduces further sulfur atoms, so the compound is chosen when stronger interactions between stacked molecules are the experimental objective.

• Chemical name: 4,5-Methylenedithio-1,3-dithiole-2-thione

Store the container tightly closed in a cool, dry and well-ventilated area, away from direct sunlight, heat sources and incompatible materials, and follow any specific storage conditions printed on the manufacturer label. Keep the compound in its original supplier container, or in a clean, chemically compatible and clearly labelled vessel if transfer is required. Handle the material inside a functioning fume hood, wearing safety glasses, suitable gloves and a laboratory coat, as sulfur-containing compounds of this type may carry an unpleasant odour. Weigh and transfer with clean, dry equipment to avoid contamination, close the container immediately after use, and consult the manufacturer safety data sheet before handling and for waste disposal guidance.

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