کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1340582 979742 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Copper(II)-saccharinato complexes with piperazine and N-(2-aminoethyl)piperazine ligands
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Copper(II)-saccharinato complexes with piperazine and N-(2-aminoethyl)piperazine ligands
چکیده انگلیسی

Two copper(II) complexes of the saccharinate anion (sac) with piperazine (ppz) and N-(2-aminoethyl)piperazine (aeppz), namely [Cu(sac)2(ppz)(H2O)]n (1) and trans-[Cu(sac)2(aeppz)2] (2), have been synthesized and characterized by elemental analyses, UV–Vis, FT-IR, TGA/DTA, X-ray diffraction and magnetic measurements. The ppz ligands in 1 bridge the copper(II) centers through both nitrogen atoms to form a 1D helical chain structure and the distorted trigonal-bipyramidal coordination geometry at each copper center is completed by an aqua and a pair of N-bonded sac ligands. The helical chains are linked by Ow–H⋯O hydrogen bonds to build a 2-D network. In complex 2, copper(II) ions are octahedrally coordinated by two sac anions and two neutral aeppz ligands, displaying a distorted octahedral coordination. Sac is O-bonded via the carbonyl group, while ppzea acts as a N,N′-bidentate chelating ligand. The molecules are connected by N–H⋯N and N–H⋯O hydrogen bonds, forming a linear chain. In the thermal decomposition of both complexes, the removal of the aqua and ppz or aeppz ligand takes place endothermically in the first stages and the sac moiety undergoes highly exothermic decomposition at higher temperatures to give CuO.

Synthesis, characterization, crystal structure and thermal properties of two copper(II)-saccharinato complexes with piperazine (ppz) and N-(2-aminoethyl)piperazine, [Cu(sac)2(ppz)(H2O)]n (1) and trans-[Cu(sac)2(aeppz)2] (2), have been reported. Complex 1 is a helical chain polymer assembled by bridging ppz ligands, while complex 2 is a centrosymmetric mononuclear compound.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 27, Issue 5, 7 April 2008, Pages 1381–1386
نویسندگان
, , ,