期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 891, 期 1-3, 页码 103-109出版社
ELSEVIER
DOI: 10.1016/j.molstruc.2008.03.014
关键词
2-Aminopyridinium; Maleate; Single crystal X-ray diffraction; Raman scattering; DSC; Phase transition
A new complex of 2-aminopyridine and maleate in 1:1 stoichiometric ratio was obtained. The complex crystallizes in non-centrosymmetric space group Pc. This complex is held by network of hydrogen bonding between the protonated 2-aminopyridinium cation and maleate anion and also by pi-pi stacking. There is no phase transition observed in this complex, which has been verified using DSC and single crystal X-ray measurement studies. A comparison between 2-aminopyridinium maleate and bis(2-aminopyridinium) maleate structure shows that the positive charge resides on the ring nitrogen in the present complex unlike the case in bis(2-aminopyridinium) maleate where the charge is on the amino nitrogen. This complex has higher meting point compared to that of bis(2-aminopyridinium) maleate which is due to the difference in hydrogen bonding pattern between the two complexes. (c) 2008 Elsevier B.V. All rights reserved.
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