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Alkali‐Metal‐Directed Hydrolytic Condensation of Trifunctional Phenylalkoxysilanes
Author(s) -
Pozdniakova Yulia A.,
Lyssenko Konstantin A.,
Korlyukov Alexandr A.,
Blagodatskikh Inessa V.,
Auner Norbert,
Katsoulis Dimitris,
Shchegolikhina Olga I.
Publication year - 2004
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200300583
Subject(s) - chemistry , alkali metal , supramolecular chemistry , hydrolysis , crystal structure , crystallography , potassium , inorganic chemistry , sodium , metal , hydrogen bond , polymer chemistry , molecule , organic chemistry
The alkali‐metal‐directed hydrolysis of phenyltrialkoxysilanes, PhSi(OR) 3 (R = Me, Et, n Bu), was performed under various reaction conditions. The alkali metal ions were used both as templating entities and as structural elements. The crystalline sodium and potassium phenylsiloxanolates (Na‐PhS and K‐PhS) were obtained in two different molecular compositions based on a cis ‐tetraphenylcyclotetrasiloxanolate, cis ‐[PhSi(O)O − ] 4 , or on a cis ‐triphenylcyclotrisiloxanolate, cis ‐[PhSi(O)O − ] 3 , anions assembled into a chain or double‐layer supramolecular structure through coordination with alkali cations and hydrogen‐bonding contacts. Conditions for selective preparation of crystalline Na‐PhS or K‐PhS of both structural types were identified. The molecular and crystal structures of [(Na + ) 3 {PhSi(O)O − } 3 ]·8H 2 O ( 2 ), [(Na + ) 3 {PhSi(O)O − } 3 ]·4H 2 O·1EtOH ( 3 ) and [(K + ) 3 {PhSi(O)O − } 3 ] 2 ·7H 2 O·3MeOH ( 4 ) were determined by single‐crystal X‐ray analysis. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)