Hydrolysis of dinuclear spacer-bridged diorganotin(IV) triflates. A novel cationic double ladder with supramolecular association
Data(s) |
01/01/2003
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Resumo |
A series of oligomethylene-bridged diorganotin triflates R(OTf)<sub>2</sub>Sn(CH<sub>2</sub>)<sub><i>n</i></sub>Sn(OTf)<sub>2</sub>R (R = CH<sub>2</sub>SiMe<sub>3</sub>; <i>n</i> = 3, 4, 8, 10) were synthesized by reaction of triflic acid with the precursor oxides R(O)Sn(CH<sub>2</sub>)<sub><i>n</i></sub>Sn(O)R. On the basis of <sup>119</sup>Sn NMR (in acetonitrile) the triflates appear to be the simple six-coordinated ionic species [(MeCN)<sub>4</sub>(RSn(CH<sub>2</sub>)<sub><i>n</i></sub>SnR)(MeCN)<sub>4</sub>]<sup>2+</sup>. These triflates readily undergo hydrolysis to give products, the identity of which depends on the length of the oligomethylene bridge. For <i>n</i> = 3 (<b>5</b>), the solid-state structure shows association of two dimeric units, which results in a tetracationic double ladder. Extensive hydrogen bonding gives rise to a supramolecular association. Solution <sup>119</sup>Sn NMR and ES MS suggest some dissociation of <b>5</b> into dimers containing four tin atoms and possibly monomers containing two tin atoms. A rudimentary solid-state structure for <i>n</i> = 4 (<b>6</b>) indicates a linear polymer based on dimeric (four tin atoms) units. The structure of <b>6</b> also features extensive hydrogen bonding, this time effectively giving rise to alternating layers of cations and anions.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
ACS Publications |
Relação |
http://dro.deakin.edu.au/eserv/DU:30002062/duthie-hydrolysisof-2003.pdf http://dx.doi.org/10.1021/om0304762 |
Direitos |
2003, American Chemical Society |
Tipo |
Journal Article |