User talk:Alexander Davronov/Archives/2023/January

Carbosilane

Here is a real carbosilane. It is a big area that needs representation in Wikipedia.--Smokefoot (talk) 21:54, 4 January 2023 (UTC)

I agree but I'm more interested in silsesquioxanes and alike. The book you recommended ([Jan 4, 2023, 19:51]) me says carbosilanes are similar to silicon carbides. AXONOV (talk) ⚑ 21:57, 4 January 2023 (UTC)

Silicon carbide usually refers to polymeric materials lacking H. Rock-like. Ceramic. SiC's are made from carbosilanes.

Silsesquioxanes are pretty. But so far as I can tell, totally useless. Lots of academic work. But they are nice to look at.--Smokefoot (talk) 22:03, 4 January 2023 (UTC)

There are few niche applications for silsesquioxanes, checkout [1] AXONOV (talk) ⚑ 22:25, 4 January 2023 (UTC)

Where are the applications? This is "propaganda" from a fine chemical company (Aldrich) trying to sell various derivatives. The main lesson from silsequisiloxanes is that they are molecular representations of subunits within zeolites and related porous materials. Very instructive, but that is all. For real world apps, they are too fragile and too expensive to make. --Smokefoot (talk) 22:33, 4 January 2023 (UTC)

How do you know they are expensive to make? AXONOV (talk) ⚑ 22:57, 4 January 2023 (UTC)

Well, although my comments dont count for much, I have seen academic people make them, and the process seemed to be tedious. These materials are far from thermodynamic products. And most open silicate esters tend to hydrolyze, which really limits their utility in the real world. They turn into silica. Try to find any app that uses a ton or even a few kg's. I wish that I am wrong. --Smokefoot (talk) 23:35, 4 January 2023 (UTC)

Well I read (The Polysiloxanes by James E. Mark, Dale W. Schaefer, Gui Lin) that silsesquioxanes may be used to improve rigidity of polymers but seems like this pertains only to ladder-like silsesquioxanes... AXONOV (talk) ⚑ 00:16, 5 January 2023 (UTC)