title: Cyclotetrasiloxanetetrols with methyl groups at silicon: isomers all-cis- and cis-trans-cis-[MeSi(O)OH](4).
abstract: 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.
authors.affiliation: A. N. Nesmeyanov Institute of Organoelement Compounds of RAS, Vavilova 28, 119991 Moscow, Russia. pozdn@ineos.ac.ru
authors.forename: Yulia A
authors.initials: YA
authors.lastname: Pozdnyakova
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Korlyukov
authors.forename: Elena G
authors.initials: EG
authors.lastname: Kononova
authors.forename: Konstantin A
authors.initials: KA
authors.lastname: Lyssenko
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Peregudov
authors.forename: Olga I
authors.initials: OI
authors.lastname: Shchegolikhina