Fig. 2: Single-crystal structures of CH20, CH21 and CH22.
From: A rare case of brominated small molecule acceptors for high-efficiency organic solar cells
a Monomolecular single crystallographic structure of CH20, CH21 and CH22 in top- and side-view. b Single-crystal packing images on the top view of CH20, CH21 and CH22. Red, gray and blue colors highlight the end groups (E), bridge unit (b) and central unit (C), respectively.
