“…It can also have consequences for the chemical reactivity, for instance 4A and 5A may behave differently upon nucleophilic attack (1,2- vs. 1,4-addition). 28,29 We found that most of the photophysical and chiroptical properties of 4A and 5A are comparable and only the absorbance maxima of 5A (480 nm, double bond in para -position to the carbonyl) is red-shifted by 12 nm when compared to 4A (468 nm, double bond in ortho -position to the carbonyl). However, the geometry strongly affects the redox behavior, as evidenced by cyclic voltammetry (CV).…”