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Organotin compounds bearing mesogenic sidechains: synthesis, x-ray structures and polymerisation chemistry


Reference:

Deacon, P. R., Devylder, N., Hill, M. S., Mahon, M. F., Molloy, K. C. and Price, G. J., 2003. Organotin compounds bearing mesogenic sidechains: synthesis, x-ray structures and polymerisation chemistry. Journal of Organometallic Chemistry, 687 (1), pp. 46-56.

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Abstract

Organotin compounds R3Sn(CH2)(n+2)OC6H4C6H4Y (R-3 = Ph-3, Ph2Bu; Y = H, CN; n = 1-3) and RX2Sn(CH2)(n+2)OC6H4C6H4Y (R = Ph, Bu; Y = H, CN; X = Br, I; n = 1-3) have been synthesised and characterised by H-1-, C-13-, Sn-119-NMR and Mossbauer spectroscopies. X-ray crystallography reveals tetrahedral geometries for Ph3Sn(CH2)(4)OC6H4C6H5 and Ph3Sn(CH2)(3)OC6H4C6H4CN, a six-coordinated, bromine-bridged dimeric structure for PhBr2Sn(CH2)(3)OC6H4C6H5 containing a mer-Br3C2OSn coordination sphere about tin and a five-coordinated monomeric structure for PhBr2Sn(CH2)3OC6H4C6H4CN. In all cases there is strong alignment of mesogenic groups in the solid-state but only PhBr2Sn(CH2)(3)OC6H4C6H4CN shows any indication of liquid-crystal behaviour. Wurtz polymerisation of RBr2Sn(CH2)(5)OC6H4C6H5 (R = Ph, Bu), both of which contain non-chelating ether functions, generated polystannanes (RR'Sn)(n) with M-n 2.3 x 10(5); M-w 3.0 x 10(5); M-w/M-n 1.30 and M-n 1.3 x 10(5); M-w 2.5 x 10(5); M-w/M-n 1.96, respectively, while no polymer was obtained from chelated PhBr2Sn(CH2)(3)OC6H4C6H5 (C) 2003 Elsevier B.V. All rights reserved.

Details

Item Type Articles
CreatorsDeacon, P. R., Devylder, N., Hill, M. S., Mahon, M. F., Molloy, K. C. and Price, G. J.
DOI10.1016/j.jorganchem.2003.08.003
DepartmentsFaculty of Science > Chemistry
RefereedYes
StatusPublished
ID Code5035
Additional InformationID number: ISI:000186691700007

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