How large is the [Fe(III)(protoporphyrin IX)]+ ion (hemin+) in the gas phase?

@article{Siu2006HowLI,
  title={How large is the [Fe(III)(protoporphyrin IX)]+ ion (hemin+) in the gas phase?},
  author={C. Siu and Y. Guo and A. C. Hopkinson and K. Siu},
  journal={The journal of physical chemistry. B},
  year={2006},
  volume={110 47},
  pages={
          24207-11
        }
}
  • C. Siu, Y. Guo, +1 author K. Siu
  • Published 2006
  • Chemistry, Medicine
  • The journal of physical chemistry. B
  • Comparison of the collision cross-section of the [Fe(III)-protoporphyrin IX]+ ion, hemin+, measured by means of ion-mobility experiments and the cross-sections calculated from theoretical structures based on density functional theory reveals that hemin+, in the gas phase, contains intramolecular hydrogen bonding between its two propionic acid side-chains. 
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