Fig. 2: Structures of the two-step [2 + 2] photocycloaddition transformation of CP1 to CP1-2β.
From: In situ observation of a stepwise [2 + 2] photocycloaddition process using fluorescence spectroscopy
![Fig. 2: Structures of the two-step [2 + 2] photocycloaddition transformation of CP1 to CP1-2β.](http://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41467-023-42604-9/MediaObjects/41467_2023_42604_Fig2_HTML.png?as=webp)
The 1D chain motifs and structures of CP1, CP1-1 and CP1-2β illustrate the monomer transformations for each step. For clarity, hydrogen atoms have been omitted. The configurations and transformations of C=C groups associated with the above reactions are highlighted in sky blue.
