Chemical Star:  2,2 ‘, 6,6’ – Tetramethyl-4,4 ‘- Bisphenol (CAS 2417-04-1) – Key Building Blocks for High Performance Materials and Synthesis

2,2 ‘, 6,6’ – tetramethyl-4,4 ‘- hydroquinone (TMBP). Due to its unique molecular structure and excellent chemical properties, it has become a highly favored high-value intermediate in fields such as polymer science and coordination chemistry.

一、 Molecular Identity Archive

Product name:  2,2 ‘, 6,6’ – Tetramethyl-4,4 ‘- bisphenol

CAS Registration Number:  2417-04-1

Molecular formula:  C ₁₆ H ₁₈ O ₂

Molecular weight:  242.31 g/mol

二、  Structural characteristics: the root of excellent performance

The core charm of TMBP molecules lies in their intricate symmetrical steric hindrance structure:

1. Rigid biphenyl skeleton: Two benzene rings are connected by a central C-C bond, forming a rigid, non coplanar core structure. This provides a foundation for constructing polymers with high glass transition temperature (Tg) and excellent mechanical properties.
2. High steric hindrance effect: Four methyl groups are introduced at the 2,2 ‘, 6,6’ positions of biphenyl. These methyl groups act like “guardians”, greatly increasing the spatial resistance of the benzene ring rotation, not only enhancing the rigidity of the molecule, but also protecting the reactive sites.
3. Active phenolic hydroxyl group: The two phenolic hydroxyl groups (- OH) located at positions 4 and 4 ‘are the core functional groups for chemical reactions. They can undergo reactions such as etherification, esterification, and polymerization, serving as the “handles” connecting various functional molecules.

This rigid, high steric hindrance, and dual active site structure makes it an ideal monomer for synthesizing high-performance materials.

三、Main application areas

The application of TMBP (CAS 2417-04-1) mainly focuses on high-tech and high value-added fields:

• High performance engineering plastics

1. Polyaryletherketone (PAEK): As a bisphenol monomer, it is used for nucleophilic substitution condensation reaction with monomers such as difluorodiphenyl ketone to prepare modified copolymers of special polyether ketone (PEK) or polyether ether ketone (PEEK). The introduction of TMBP monomers can significantly improve the glass transition temperature (Tg), thermal oxidation stability, and rigidity of polymers, meeting the ultimate demand for high-temperature resistant materials in aerospace, electronics, and electrical fields.
2. Polyaromatic esters (PAR): Polyaromatic esters can be prepared by reacting with aromatic diacyl chlorides to obtain polymer materials with excellent heat resistance, transparency, and mechanical properties.

• Functional polymers

1. Self repairing polymer: Its structure can be used to construct reversible covalent bond networks and is a key component in the development of self-healing materials.
2. Liquid crystal polymer (LCP): Its rigid rod-shaped structure is an excellent monomer for preparing high-performance liquid crystal polymers, which are widely used in fields such as electronic connectors.

• Macrocycles and Supramolecular Chemistry

1. Crown ethers and cavity ethers: used as synthetic precursors to construct macrocyclic molecules with specific cavity sizes and recognition abilities for ion recognition, sensing, and catalysis.
2. Metal organic frameworks (MOFs): They can be used as organic linkers to coordinate with metal ions and assemble into MOF materials with porous structures, which are applied in gas adsorption, separation, and storage.

• Coordination Chemistry and Catalysis

Its phenoxy group is an excellent coordinating group that can coordinate with various metal ions (such as titanium, vanadium, aluminum, etc.) to form well-defined metal complexes. These complexes are commonly used as efficient catalysts, exhibiting high activity and selectivity in olefin polymerization, asymmetric synthesis, and oxidation reactions.

四、 Safety and Operation

As a fine chemical, caution should be exercised when handling 2,2 ‘, 6,6’ – tetramethyl-4,4 ‘- hydroquinone:

• Phenolic compounds are usually irritating to the skin, eyes, and respiratory tract. Proper personal protective equipment (PPE) should be worn during operation, such as nitrile gloves, protective goggles, and dust masks.
• Avoid the formation of dust and operate in a well ventilated environment to avoid inhalation.
• It should be stored in a cool, dry, and dark environment, and placed in a sealed container.

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