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Synthesis and structure of new oligomethylene-bridged double ladders. How far can the layers be separated?

Beckmann, Jens, Dakternieks, Dainis, Duthie, Andrew, Kuan, Fong Sheen, Jurkschat, Klaus, Schurmann, Markus and Tiekink, Edward R. T. 2004, Synthesis and structure of new oligomethylene-bridged double ladders. How far can the layers be separated?, New journal of chemistry, vol. 2004, no. 28, pp. 1268-1276, doi: 10.1039/b316009b.

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Title Synthesis and structure of new oligomethylene-bridged double ladders. How far can the layers be separated?
Author(s) Beckmann, Jens
Dakternieks, Dainis
Duthie, Andrew
Kuan, Fong Sheen
Jurkschat, Klaus
Schurmann, Markus
Tiekink, Edward R. T.
Journal name New journal of chemistry
Volume number 2004
Issue number 28
Start page 1268
End page 1276
Publisher RSC Publishing
Place of publication Cambridge, England
Publication date 2004
ISSN 1144-0546
1369-9261
Summary The synthesis of the α,ω-bis[dichloro(trimethylsilylmethyl)stannyl]alkanes, (Me3SiCH2)C12Sn(CH2)nSnCl2(CH2SiMe3) (13, n=5; 14, n=6; 15, n=7; 16, n=8; 17, n=10; 18, n=12) and the corresponding oligomethylene-bridged diorganotin oxides [(Me3SiCH2)(O)Sn(CH2)nSn(O)(CH2SiMe3)]m (19, n=5; 20, n=6; 21, n=7; 22, n=8; 23, n=10; 24; n=12) is reported. The reaction of the diorganodichlorostannanes 13–18 with the corresponding diorganotin oxides 19–24 provided the spacer-bridged tetraorganodistannoxanes {[(Me3SiCH2)ClSn(CH2)nSnCl(CH2SiMe3)]O}4 (25, n=5; 26, n=6; 27, n=7; 28, n=8; 29, n=10; 30, n=12). Compounds 13–30 have been identified by elemental analyses and multinuclear NMR spectroscopy. Compounds 25, 27, 29 and 30 have also been characterised by single crystal X-ray diffraction analysis and electrospray mass spectrometry. For the latter the essential double ladder motif is maintained for all n in the solid state, but subtle changes in alignment of the ladder planes occur. Separation between the two layers of the double ladder ranges from approx. 8.7  Å (for 25, n=5) to approx. 15 Å (for 30, n=12). In solution there is some dissociation of the double ladders into the corresponding dimers. The degree of dissociation is favoured by increasing oligomethylene chain length n.


Notes First published on the web 16th September 2004
Language eng
DOI 10.1039/b316009b
Field of Research 030599 Organic Chemistry not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2004, The Royal Society of Chemistry
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30002731

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