کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9769825 | 1501931 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Different complexation behavior of a proton transfer compound obtained from 1,10-phenanthroline and pyridine-2,6-dicarboxylic acid with InIII and CeIII: Synthesis, crystal structures and solution studies
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The different complexation methods of a proton transfer compound LH2, (phenH)2(pydc) (phen=1,10-phenanthroline; pydcH2=pyridine-2,6-dicarboxylic acid), are discussed and formation of [In2SO4(pydc)2(phen)2(H2O)2]·5.5H2O (1) and {[Ce(pydc)(pydcH)(H2O)2]·4H2O}n (2) are reported. The complexes were synthesized by reaction of LH2 with In2(SO4)3·xH2O and Ce(NO3)3·6H2O, respectively. The characterization was performed using IR spectroscopy and X-ray diffraction. The complex 1 crystallizes in the space group P1¯ of the triclinic system, with two molecules per unit cell. The unit cell parameters are a=11.9547(6) Ã
, b=12.8482(7)Â Ã
, c=16.1313(8)Â Ã
, α=89.532(1)°, β=72.007(1)° and γ=68.066(1)°. The crystal system of the complex 2 is monoclinic with space group P21/c and four molecules per unit cell. The unit cell parameters are a=14.0273(8) Ã
, b=11.2184(6)Â Ã
, c=12.9441(8)Â Ã
and β=102.177(5)°. The complex 1 is a binuclear mixed-ligand system in which both phen and (pydc)2â have contributed to the molecular structure as tri- and bi-dentate ligands, respectively. The complex 2 is a polymeric system in which only one of the fragments of LH2 has acted as a ligand. In both complexes 1 and 2 a large number of hydrogen bonds are observed. These interactions especially in case of complex 2 play an important role in the formation of self associated systems in the crystal lattices. Results of the potentiometric pH titration studies in aqueous solution strongly confirm the formation of InIII and CeIII complexes in solution with stoichiometries very similar to those of the crystalline complexes 1 and 2, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 779, Issues 1â3, 25 November 2005, Pages 77-86
Journal: Journal of Molecular Structure - Volume 779, Issues 1â3, 25 November 2005, Pages 77-86
نویسندگان
Farshid Ramezanipour, Hossein Aghabozorg, Ardeshir Shokrollahi, Mojtaba Shamsipur, Helen Stoeckli-Evans, Janet Soleimannejad, Shabnam Sheshmani,