Molecular recognition. 1. Crystal structures of hexaazamacrocyclic amines containing p-xylylene spacers and their adducts with acids

• Teresa Borowiak,
• Grzegorz Dutkiewicz,
• Maciej Kubicki,
• Marek Pietraszkiewicz,
• Agnieszka Gil and
• Rainer Mattes

Beilstein J. Org. Chem. 2005, 1, No. 16, doi:10.1186/1860-5397-1-16

• symmetry no shift between the centroids of the phenyl rings exists, they are oriented in an antiparallel mode with the angle between their planes of 43.1(1)°. The observed C-N bond lengths range from 1.483(5) to 1.506(5) Å and confirm protonation of all N atoms. Moreover, all the hydrogen atoms at