@article{SengeDahmsHoldtetal.2015,
  author    = {Senge, Mathias O. and Dahms, Katja and Holdt, Hans-J{\"u}rgen and Kelling, Alexandra},
  title     = {Porphyrin substituent regiochemistry, conformation and packing - the case of 5,10-diphenylporphyrin},
  series = {Zeitschrift f{\"u}r Naturforschung : B, Chemical sciences},
  volume    = {70},
  journal   = {Zeitschrift f{\"u}r Naturforschung : B, Chemical sciences},
  number    = {2},
  publisher = {De Gruyter},
  address   = {T{\"u}bingen},
  issn      = {0932-0776},
  doi       = {10.1515/znb-2014-0217},
  pages     = {119 -- 123},
  year      = {2015},
  abstract  = {5,10-Disubstituted porphyrins are more recent additions to the family of meso-substituted porphyrins. A crystallographic comparison of 5,10-diphenylporphyrin with the regioisomeric 5,15-disubstituted system reveals striking differences in their conformation. In the free base porphyrins the former uses mainly out-of-plane distortion to alleviate steric strain while in-plane core elongation predominates in the latter. In contrast, the structure of the Cu(II) complex is planar and forms strong p-p aggregates with very small lateral shifts. Macroscopically, the packing is similar to that of porphyrin sponges of the 5,10,15,20-tetraphenylporphyrin type.},
  language  = {en}
}