648930-69-2Relevant academic research and scientific papers
Organotin compounds bearing mesogenic sidechains: Synthesis, X-ray structures and polymerisation chemistry
Deacon,Devylder,Hill,Mahon,Molloy,Price
, p. 46 - 56 (2008/10/08)
Organotin compounds R3Sn(CH2)n+2OC 6H4C6H4Y (R3=Ph 3, Ph2Bu; Y=H, CN; n =1-3) and RX2Sn (CH2)n+2OC6H4C6 H4Y (R=Ph, Bu; Y=H, CN; X=Br, I; n=1-3) have been synthesised and characterised by 1H-, 13C-, 119 Sn-NMR and M?ssbauer spectroscopies. X-ray crystallography reveals tetrahedral geometries for Ph3Sn(CH2)4 OC6H4C6H5 and Ph3 Sn(CH2)3OC6H4C6 H4CN, a six-coordinated, bromine-bridged dimeric structure for PhBr2Sn(CH2)3OC6 H4C6H5 containing a mer-Br3 C2OSn coordination sphere about tin and a five-coordinated monomeric structure for PhBr2Sn(CH2)3 OC6H4C6H4CN. In all cases there is strong alignment of mesogenic groups in the solid-state but only PhBr2Sn(CH2)3OC6 H4C6H4CN shows any indication of liquid-crystal behaviour. Wurtz polymerisation of RBr2 Sn(CH2)5OC6H4C6 H5 (R=Ph, Bu), both of which contain non-chelating ether functions, generated polystannanes (RR′Sn)n with Mn 2.3×105; Mw 3.0× 105; Mw/Mn 1.30 and Mn 1.3×105; Mw 2.5×105; Mw/Mn 1.96, respectively, while no polymer was obtained from chelated PhBr2Sn(CH2)3 OC6H4C6H5
