A new series of ternary lanthanium(III) and cerium(III) complexes containing Schiff bases derived from some amino acids, viz: glycine; alanine; phenylalanine; valine and leucine with 2-hydroxy-1-naphthaldehyde as primary ligands, and 1-methylimidazole & 1,2-dimethylimidazole as secondary ligands were synthesized. The complexes were characterized on the bases of microanalyses, electrical conductance, IR & 1H NMR spectra, thermal analysis and cyclic voltammetric data. ... إقراء المزيد

The metal complexes of lanthanum(III) and cerium(III) with Schiff bases derived from the condensation of 2‐hydroxy‐1‐naphthaldehyde with _α_‐amino acids, viz. glycine, alanine, phenylalanine, valine, leucine and L‐glutamine, have been prepared and studied. The structures of these complexes are assigned on the basis of elemental analyses, molar conductance, IR and 1H NMR spectra and thermal analyses data. The results suggest that ... إقراء المزيد

* وضح السبب لإستخدام الأشعه السينيه فى دراسة التراكيب البلوريه للمواد الصلبة مع إشتقاق المعادلة الخاصة بذلك. (5.16 درجة) ج) احسب حرارة تكوين فوق أكسيد الهيدروجين السائل مستعيناً بالمعادلات الآتيه: (5.16 درجة) H2O2(L) → H2O(L) + 1/2 O2(G) -ΔHO= -98 KJH2O2(L) → H2O(L) + 1/2 O2(G) -ΔHO= -98 KJH2O2(L) → H2O(L) + 1/2 O2(G) -ΔHO= -98 KJH2O2(L) → H2O(L) + ... إقراء المزيد