hexadecamethylcyclooctasiloxane

• CAS: 556-68-3
• Catalog Number: ACM556683
• Category: Main Products
• Molecular Weight: 593.23
• Molecular Formula: C16H48O8Si8
• Synonyms: Cyclooctasiloxane,2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-hexadecamethyl-
• Appearance: Colourless to pale yellow liquid

Case Study

Green Synthesis Strategy for Polydimethylsiloxane Using Hexadecamethylcyclooctasiloxane

Kherroub, Djamal Eddine, et al. Bulletin of Chemical Reaction Engineering & Catalysis, 2018, 13(1), 36-46.

In this study, an environmentally benign solid catalyst, Maghnite-H+, was employed to polymerize hexadecamethylcyclooctasiloxane (D8), facilitating the green synthesis of polydimethylsiloxane via heterogeneous catalysis. The polymerization occurs through the opening of monomer rings without requiring solvents or diluents, and only 4 wt% of the catalyst is necessary for the process. Furthermore, a reaction mechanism is proposed to elucidate the function of Maghnite-H+ during the reaction.
Polymerization Procedure
Initially, 0.2 g of Maghnite-H+ was subjected to heating under vacuum with mechanical stirring for 30 minutes prior to its application. The polymerization was conducted in bulk, where the dried Maghnite-H+ was added to a flask containing 5 g of hexadecamethylcyclooctasiloxane. This flask was placed in an oil bath and heated to 70 °C while being stirred under reflux conditions. After 8 hours, the reaction was terminated by deactivating the Maghnite-H+ with the addition of cold water to the mixture. The Maghnite-H+ was then recovered through filtration, and the resulting filtrate was precipitated in methanol (a non-solvent). The insoluble polymer product was subsequently dried in a vacuum at 80 °C for 6-8 hours and weighed. Any excess water was eliminated by evaporation at 105 °C, with the difference between the initial volume and the amount recovered indicating the quantity of water required to halt the reaction.

Custom Q&A

What is the molecular formula of hexadecamethylcyclooctasiloxane?

The molecular formula of hexadecamethylcyclooctasiloxane is C16H48O8Si8.

When was hexadecamethylcyclooctasiloxane created and modified?

Hexadecamethylcyclooctasiloxane was created on 2005-03-27 and modified on 2023-12-30.

What is another name for hexadecamethylcyclooctasiloxane?

Another name for hexadecamethylcyclooctasiloxane is Cyclooctasiloxane, hexadecamethyl.

What is the molecular weight of hexadecamethylcyclooctasiloxane?

The molecular weight of hexadecamethylcyclooctasiloxane is 593.2 g/mol.

What is the InChI Key of hexadecamethylcyclooctasiloxane?

The InChI Key of hexadecamethylcyclooctasiloxane is XKJMJYZFAWYREL-UHFFFAOYSA-N.

How many hydrogen bond acceptor counts does hexadecamethylcyclooctasiloxane have?

Hexadecamethylcyclooctasiloxane has 8 hydrogen bond acceptor counts.

What is the topological polar surface area of hexadecamethylcyclooctasiloxane?

The topological polar surface area of hexadecamethylcyclooctasiloxane is 73.8 Ų.

How many heavy atoms does hexadecamethylcyclooctasiloxane contain?

Hexadecamethylcyclooctasiloxane contains 32 heavy atoms.

Does hexadecamethylcyclooctasiloxane have any defined atom stereocenter counts?

No, hexadecamethylcyclooctasiloxane does not have any defined atom stereocenter counts.

What is the complexity value of hexadecamethylcyclooctasiloxane?

The complexity value of hexadecamethylcyclooctasiloxane is 450.