Summary.
The dipolar cyclohexasilanes 1-ferrocenyl-4-((2,2-dicyanoethenyl)-phenyl)-decamethylcyclohexasilane (1) and 1-ferrocenyl-3-((2,2-dicyanoethenyl)-phenyl)-decamethylcyclohexasilane (2) were synthesized by conventional methods and fully characterized. Electronic absorption spectroscopic studies suggest increased σ-π interactions in the cyclohexasilane derivatives when compared to their open-chained analogues. Small but noticeable electron transmission effects via the cyclohexasilanyl group can be derived from cyclic voltammetric data. Significantly increased values of the quadratic hyperpolarizabilities β in solution for 1 and 2 are shown by preliminary results of measurements using the EFISH technique.
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Received May 30, 2000. Accepted December 20, 2000
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Grogger, C., Rautz, H. & Stüger, H. Donor-Acceptor Substituted Cyclohexasilanes: Materials with Potential Nonlinear Optical Properties. Monatshefte fuer Chemie 132, 453–464 (2001). https://doi.org/10.1007/s007060170108
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DOI: https://doi.org/10.1007/s007060170108