Cyclotetrasiloxanetetrols with methyl groups at silicon: isomers all-cis- and cis-trans-cis-[MeSi(O)OH](4).
1,3,5,7-Tetramethyl-1,3,5,7-tetrahydroxycyclotetrasiloxane has been synthesized in good yield from tetrapotassium tetramethylcyclotetrasiloxanolate. Methods for isolation of all-cis-isomer I and cis-trans-cis-isomer II as the only crystalline product have been developed. Both isomers have been characterized by single-crystal X-ray diffraction analysis (XRD), elemental analysis, NMR ((1)H, (13)C, (29)Si), and IR. The stability of these compounds in solutions and the solid state has been investigated.
Pozdnyakova
Yulia A
YA
A. N. Nesmeyanov Institute of Organoelement Compounds of RAS, Vavilova 28, 119991 Moscow, Russia. pozdn@ineos.ac.ru
Korlyukov
Alexander A
AA
Kononova
Elena G
EG
Lyssenko
Konstantin A
KA
Peregudov
Alexander S
AS
Shchegolikhina
Olga I
OI