Arnold, P. L., Blake, A. J., Hall, S. N., Ward, Benjamin David  ORCID: https://orcid.org/0000-0003-1406-5940 and Wilson, C.
2001.
A functional model for lanthanide doped silicate materials: synthesis of an apically substituted samarium silsesquioxane complex.
Dalton Transactions
(4)
, pp. 488-491.
10.1039/B009123P
|
Abstract
Steric protection of a trisilanol silsesquioxane (also referred to as a silasesquioxane) by one TBDMS group (SiMe2But) generated a new siloxanolate ligand, (c-C5H9)7Si7O9(OH)2(OTBDMS) 1, that allows only restricted access to a co-ordinated metal. Lithiation afforded the stable complex (c-C5H9)7Si7O9(OLi)2(OTBDMS), which has allowed the generation of a samarium adduct [Sm(OC6H3But2-2,6){(c-C5H9)7Si7O9(O)(OLi)(OTBDMS)}2]. A structural study of this samarium adduct revealed two unusual features: an absence of stabilising M–O interactions with the siloxane core, and retention of one apical aryloxide group at the trivalent metal, through which the chemistry of a silica-functionalised Ln3+ ion might be modelled. X-Ray crystallography also revealed the dimeric hydrogen bonded structure of the disilanol ligands. The disilanol ligand 1 may also readily be converted into a dithallium salt, providing a potential precursor for further f-element derivatives of this disilanolate moiety.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Chemistry |
| Subjects: | Q Science > QD Chemistry |
| Publisher: | Royal Society of Chemistry |
| ISSN: | 1364-5447 |
| Last Modified: | 18 Oct 2022 12:24 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/9706 |
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