@article{GrotjahnLehmannAurichetal.2001,
  author    = {Grotjahn, Manuela and Lehmann, S. and Aurich, Ines and Holdt, Hans-Joachim and Kleinpeter, Erich},
  title     = {NMR spectroscopic and molecular modelling studies of the solution structure and complexational behaviour of some bis(benzocrown ether)s},
  year      = {2001},
  abstract  = {Structural information about the bis(benzo crown ether)s I-VI and their complexes with alkali metal cations was deduced from the 13C NMR chemical shifts, the salt-induced 1H and 13C chemical shifts and the vicinal 1H,1H coupling constants. Especially the isomerism with respect to the amide O=C - NH bonds and imine fragments were assigned by various useful NMR parameters ( C=O, 1JN,H, 1JC,H) and proved to be E,E-anti,anti. Furthermore, stereochemical information about preferred conformations about flexible bonds was obtained from 2D ROESY NMR experiments. The complex formation (2:1 complexes and sandwich-like 1:1 complexes, respectively) were determined also by 23Na NMR spectroscopy. The conformational study of the crown ethers was accompanied and corroborated by molecular dynamics and quantum chemical calculations.},
  language  = {en}
}
@article{PihlajaLehmannSchrothetal.1996,
  author    = {Pihlaja, Kalevi and Lehmann, S. and Schroth, W. and G{\"a}ber, M. and Kleinpeter, Erich},
  title     = {Electron impact induced fragmentation of dibenzo crown ethers},
  year      = {1996},
  language  = {en}
}