Journal article
Dimer formation upon deprotonation: synthesis and structure of a m-terphenyl substituted (R,S)-dilithium disiloxanolate disilanol



Publication Details
Authors:
Čas, D.; Hurkes, N.; Spirk, S.; Belaj, F.; Bruhn, C.; Rechberger, G.; Pietschnig, R.
Publisher:
Royal Society of ChemistryDO - 10.1039/C5DT01992C
Publication year:
2015
Journal:
Dalton Transactions
Pages range:
12818-12823
Volume number:
44
Start page:
12818
End page:
12823
ISSN:
1477-9226

Abstract
The synthesis and structural characterization of the first dilithium salt of a tetrahydroxydisiloxane, [DmpSi(OH)OLi]2O (6), is described (Dmp = 2,6-dimesitylphenyl). The solid state structure reveals the presence of a dimeric motif where two disiloxane units are linked by coordinating lithium atoms which differs from those found for the sodium and potassium analogs. The arrangement imposed by the cluster formation leads to diastereomeric silicon atoms exhibiting (R,S) configuration in the solid state. In addn., the intermediates of the reaction, monolithiated and dilithiated silanetriol could be identified by means of high-resoln. mass spectrometry and the formation of 6 is discussed. Moreover, the fully protonated tetrahydroxydisiloxane, [DmpSi(OH)2]2O has been obtained as well and its solid state structures with varying hydrogen bond acceptors have been surveyed. [on SciFinder(R)]


Keywords
dimer formation deprotonation prepn structure terphenyl dilithium disiloxanolate disilanol

Last updated on 2021-17-09 at 17:48