Convenient Synthesis of New Si-H and Si-Vinyl Functionalized Stereospecific 8-, 12- and 24-Membered Cyclosiloxanes

Star‐shaped siloxane polymers with various cyclic cores: Synthesis and properties

“…The glass transition temperature can be affected by the presence of end groups. The thermophysical properties of the stereoregular cyclosiloxanes (used as cores in compounds P 1 – P 6 ) were reported previously . The glass transition temperature of the star‐shaped PDMSs D 4 ‐PDMS (P 1 ) – D 12 ‐PDMS (P 6 ) synthesized is higher than that of an individual PDMS arm and varies in a narrow range from −123 to −125 °C (Table ).…”

“…The reactions of such metallasiloxane precursors with chlorodimethylsilane give functional siloxane macrocycles cis ‐[(Ph)(OSiMe 2 H)O] n [ n = 4 ( C 1 ),5 ( C 2 ), 6 ( C 3 ), 8 ( C 4 )] and tris‐ cis ‐tris‐ trans ‐[(Ph)(OSiMe 2 H)O] 12 ( C 6 ) (Fig. ) in a high yield …”

“…Functional stereoregular phenylcyclosiloxanes C 1 , C 3 , and C 6 were synthesized as described earlier, and (HSiMe 2 O)Si 8 O 12 ( Q 8 M 8 H ) ( C 5 ) was synthesized according to the published technique …”

Polyphenylsilsesquioxanes. New structures–new properties

“…104 Functional stereoregular macrocycles are in great demand for the synthesis of numerous derivatives. 105 In fact, they became a versatile multipurpose platform for synthesizing new polymeric forms, for example, star-shaped polymers 106,107 and analogs of calixarenes. 108 Some hydroxy derivatives of macrocycles exhibit the properties of plastic crystals due to a specic organization of hydrogen bonds.…”

Organoboron Derivatives of Stereoregular Phenylcyclosilsesquioxanes

“…It should be noted, that sincet he discoveryo fd endrimers [20,21] and molecular brushes, [22][23][24] the field of organosilicons upramolecular chemistry has undergone a fast evolution due to the advantageso fs iloxane and carbosilane structures and the methods for their synthesis. Our group has developed au nique method for synthesizingf unctional, stereoregular organosilesesquioxane macrocycles( 4, 6a nd 12 SiÀOu nits) [25][26][27][28] that could not be obtained using classical silicone chemistry methods. This class of compounds can compete with the currently popular derivativeso fc alixarenes [29] and cyclodextrins [30] in the field of the productiono fn ew supramolecular systems.…”