D. Łowicki et al. / Journal of Molecular Structure 990 (2011) 121–131
131
(structure B) are energetically more favourable than those in which
Acknowledgement
the carbonyl group is not involved (structure A). Furthermore, the
formation of intramolecular hydrogen bonds between the O(12) or
O(13) oxygen atoms and the N–H proton (structures A1 and B1 or
Daniel Łowicki wishes to thank the Adam Mickiewicz Univer-
sity Foundation in Poznan for fellowship.
A2 and B2, respectively) slightly influences these
ble 2). The highest
HOF value (À203.62 kcal/mol) is found for the
M-AM4–Na+ complex of the structure B2 indicating that this struc-
ture is preferentially formed. The
HOF values for the M-AM4–Na+
complex of the structures A–A2 demonstrate that these structures
cannot exist in comparison with the structures B–B2. Similar
observations have been made for the M-AM4–Li+ complex
DHOF values (Ta-
D
Appendix A. Supplementary data
D
Supplementary data associated with this article can be found, in
References
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