1693-51-2

Usage

Molecular structure

Three silicon atoms and three oxygen atoms arranged in a ring The unique arrangement of these atoms forms the core structure of the compound.

Precursors

Silicone polymer synthesis The compound serves as a starting material for the production of silicone polymers.

Industrial applications

Electronics, pharmaceuticals, and cosmetics It is used in a variety of industries due to its unique properties.

Stability

Highly stable and non-reactive This characteristic makes it suitable for use in a wide range of products.

Environmental concerns

Persistence in the environment and potential for bioaccumulation These factors contribute to its classification as a potential environmental hazard.

Regulations

Use and disposal subject to strict regulations in many countries Due to its potential environmental impact, the compound is regulated in various nations.

Upstream product

• 18420-09-2 1,3-diethoxy-1,1,3,3-tetramethyldisiloxane 
• 947-42-2 diphenylsilanediol 
• 3277-26-7 1,1,3,3-Tetramethyldisiloxane 

Downstream Products

• 68026-53-9 1,5-dihydroxy-1,1,5,5-tetramethyl-3,3-diphenylsiloxane 

Relevant academic research and scientific papers

PROCESS FOR THE PRODUCTION OF CYCLOSILOXANES

Embodiments of the invention are directed to the preparation of a discrete cyclosiloxane or a discrete mixture of cyclosiloxanes where a dihydroxysilane or dihydroxysiloxane condenses with a dihydrosilane or dihydroxysiloxane in the presence of a Lewis acid catalyst in a reaction phase including a solvent. The introduction of the dihydroxysilane or dihydroxysiloxane and dihydrosilane or dihydroxysiloxane is controlled such that the cyclocondensation occurs in a reaction phase that is dilute in the SiH and SiOH functionality permitting the isolation of the monocyclocondensation adduct in high yield with little higher molecular weight condensation products. In one embodiment of the invention 1,1-diphenyl-3,3,5,5-tetramethylcyclotrisiloxane is prepared in very high yield.

DEHYDROCONDENSATION OF ORGANIC HYDROSILANES WITH SILANOLS. PART I. KINETICS AND MECHANISM OF THE REACTION IN DIMETHYLFORMAMIDE

Kinetics of dehydrocondensation of organic hydrosilanes with silanols in DMF and in presence of zinc and cadmium halogenides has been studied.The reactivities of series of hydrosilanes and hydrosiloxanes were determined.Activation parameters of the reaction and catalytic activities of the catalysts were determined and shown to be consistent with the mechanism which had been earlier proposed basing on formal kinetics.

DEHYDROCONDENSATION OF ORGANIC HYDROSILANES WITH SILANOLS. PART II. EFFECT OF SILOXANE CHAIN LENGTH ON THE REACTIVITY OF SI-H END-GROUPS. THE SUBSTITUTION EFFECT

It has been found that the reactivity of Si-H end-groups in the homologous series of α,-dihydropolidimethylsiloxanes H(Me2SiO)nSiMe2H in their reaction with diphenylsilanediol in DMF and in presence of ZnCl2 decreases for n changing from 1 to 3 and is stabilized for larger n.The substitution effect of a single Si-H group in 1,1,3,3-tetramethyldisiloxane by triphenylsilanol was determined from rate measurements of the reaction of the primary product of condensation: 1,1,3,3-tetramethyl-5,5,5-triphenyltrisiloxane, which was prepared independently.A kinetic model of non-equilibrium polycondensation proceeding with a single reactivity change of a functional group was devised and numerically checked.