کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5409466 | 1506544 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Formation studies of binary and ternary complexes of copper(II) with an oxazol derivative of nicotinic acid and some amino acids
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Binary and ternary complexes of copper(II) with the 2-(benzo[d]oxazol-2-yl)nicotinic acid (Ligand HL) and the amino acids Glycine (HGly, HB), Proline (HPro, HB), α-Alanine (Hα-Ala, HB), β-Alanine (Hβ-Ala, HB) were studied in aqueous solution at 25 °C, using 1.0 mol · dmâ 3 KNO3 as the ionic medium. The types of complexes formed and their overall stability constants were established on the basis of the computer analysis of the potentiometric data, using a version of the program LETAGROP. It was inferred that the aromatic oxazol Ligand Lâ 1 acts as a primary ligand in the ternary complexes, while the oxygen and nitrogen donor-containing amino acids are the secondary ligands. The analysis showed the formation of five complexes: [Cu(L)(HB)]+, Cu(L)(B), [Cu(L)(B)(OH)]â, [Cu(L)2(B)]â and [Cu(L)(B)2]â in the Cu(II)-Lâ-Gly and Cu(II)-Lâ -βAla systems, for the Cu(II)-Lâ-Pro system, the complexes [Cu(L)(HB)]+, Cu(L)(B), [Cu(L)(B)(OH)]â and [Cu(L)(B)2]â were detected and, finally, in the Cu(II)- Lâ - αAla system, only the complexes [Cu(L)(HB)]+, Cu(L)(B) and [Cu(L)(B)(OH)]â were observed. The concentration distributions of various species formed in aqueous solution were also evaluated as a function of pH.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 227, February 2017, Pages 218-222
Journal: Journal of Molecular Liquids - Volume 227, February 2017, Pages 218-222
نویسندگان
Neudo Urdaneta, Waleska Madden, Vanessa R. Landaeta, Rafael RodrÃguez-Lugo, Lino Hernández, Vito Lubes,