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Showing 15Za-18Et-BV chromophore with ZZZasa geometry (as in Fig. 9). Blue arrows: ν(C19 = O) tdm, red arrows: ν(C1 = O) tdm. Blue and cyan cones show 1σ range of angle μC19 = O around vibrational tdm of ν(C19 = O); red and pink cones show 1σ range of angle μC1 = O around vibrational tdm of ν(C1 = O).
