کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1411645 1501868 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, spectral and thermal characterization of nano-sized, oxo-centered, trinuclear carboxylate-bridged chromium(III) complexes of hydroxycarboxylic acids
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis, spectral and thermal characterization of nano-sized, oxo-centered, trinuclear carboxylate-bridged chromium(III) complexes of hydroxycarboxylic acids
چکیده انگلیسی

Complexes of the type [Cr3O(OOCR∗)3(OOCR)3]+ [R∗ = C6H4OH, (R′); C6H5CH(OH), (R″) or (C6H5)2C(OH), (R′″) and R = C15H31 or C17H35] were synthesized by substitutions of acetate ions from their respective acetato complexes, in toluene under reflux. The characterization of the complexes were carried out by spectral (infrared, electronic, FAB mass and powder XRD) studies, elemental analyses, molar conductance and magnetic susceptibility measurements. Their thermal decompositions have been studied by using dynamic, nonisothermal thermogravimetry (TG) and differential scanning calorimetry (DSC). Infrared spectra suggested bidentate and bridging nature of both the carboxylate and hydroxycarboxylate anions along with νasym(Cr3O) vibrations in the complexes. FAB mass spectrometry showed trinuclear nature of the complexes. Molar conductance value of the complexes showed the complexes were 1:1 electrolyte. Magnetic moment values and electronic spectra of these complexes were in support of an octahedral environment around the chromium(III) ion. X-ray diffraction data indicated the nano-sized powder.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 920, Issues 1–3, 28 February 2009, Pages 472–477
نویسندگان
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