Summary.
1-(Dipyrrin-2-yl)-1′-(dipyrrin-3-yl)methane, the N-confused analog of biladiene-ac, is prepared by condensation of 2,3′-dipyrromethane with two molecules of 2-formylpyrrole in dichloromethane in the presence of hydrogen bromide. Self-assembly of the ligand with Zn(II) in dichloromethane and methanol offers a dinuclear dimeric complex with a ligand:metal ratio of 2:2. X-Ray crystal structure analysis reveals two ligands bound through a head-to-tail pattern to two zinc centers to form a severely distorted helical conformation, which has the shape of a rectangle.
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Yang, L., Zhang, Y., Chen, Q. et al. Molecular Rectangle Formed by Head-to-tail Self-Assembly of 1-(Dipyrrin-2-yl)-1-(dipyrrin-3-yl)methane. Monatshefte für Chemie 135, 223–229 (2004). https://doi.org/10.1007/s00706-003-0099-9
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DOI: https://doi.org/10.1007/s00706-003-0099-9