Bis-silyl substituted ferrocenylenes, including dicyanovinyl electron-withdrawing groups, as potential non-linear optical materials
摘要:
1,1'-Bis-silylferrocenylenes (p-XC6H4SiMe2-C5H4)(2)Fe, X=Br (1), CHO (2), CH=C(CN)2 (3) have been synthesized and characterized by NMR and Mossbauer spectroscopy, single crystal X-ray diffraction and electrochemistry. Complex 1 crystallizes in the centrosymmetric space group P2(1)/n whereas 3 forms in the non-centrosymmetric group Cc. The latter complex exhibits a chain-like structure in the solid state via C-H... N intermolecular hydrogen bonding. The hyperpolarizability of 3 is significantly greater than the related mono-silylferrocene complex (C5H5)Fe(C5H4SiMe2C6H4CH-C(CN)(2)) while Mossbauer spectroscopy exhibits negligible charge transfer between the cyano groups and the ferrocenylene iron center. (C) 2003 Published by Elsevier B.V.
Bis-silyl substituted ferrocenylenes, including dicyanovinyl electron-withdrawing groups, as potential non-linear optical materials
摘要:
1,1'-Bis-silylferrocenylenes (p-XC6H4SiMe2-C5H4)(2)Fe, X=Br (1), CHO (2), CH=C(CN)2 (3) have been synthesized and characterized by NMR and Mossbauer spectroscopy, single crystal X-ray diffraction and electrochemistry. Complex 1 crystallizes in the centrosymmetric space group P2(1)/n whereas 3 forms in the non-centrosymmetric group Cc. The latter complex exhibits a chain-like structure in the solid state via C-H... N intermolecular hydrogen bonding. The hyperpolarizability of 3 is significantly greater than the related mono-silylferrocene complex (C5H5)Fe(C5H4SiMe2C6H4CH-C(CN)(2)) while Mossbauer spectroscopy exhibits negligible charge transfer between the cyano groups and the ferrocenylene iron center. (C) 2003 Published by Elsevier B.V.