The cis-stibenes (1a–g) undergo photocatalysed cis-trans-isomerization on CdS; the Hammett plot for the reaction has a sharp break at σ+=–0.19 [E°½= 1.47 V vs. standard calomel electrode] and is rationalized in terms of both exergonic and endergonic photocatalysed processes on the semiconductor with different rate-determining steps.
T. Hasegawa and P. de Mayo, J. Chem. Soc., Chem. Commun., 1985, 1534 DOI: 10.1039/C39850001534
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