Ferrocene in Conjugation with a Fischer Carbene: Synthesis, NLO, and Electrochemical Behavior of a Novel Organometallic Push-Pull System
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文摘
Using an iterative sequence of Wittig olefination, reduction, oxidation, and condensationof an active methylene group to carbonyl, it was possible to prepare a series of organometallicpush-pull molecules [(CO)5M=C(OCH3)(-CH=CH-)n(C5H4)Fe(C5H5), M = W, Cr, n = 1-4]in which ferrocene is the donor element and a Fisher carbene moeity is the acceptor group.The molecular first hyperpolarizability was determined by hyper-Rayleigh scatteringexperiments. The values ranged from 110 × 10-30 to 2420 × 10-30 esu in acetonitrile, andthey are among the highest reported for organometallic molecules so far. Electrochemicalmeasurements are consistent with the push-pull nature of these compounds.

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