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Abstract  

N,N′-bis(salicylidene)-1,3-propanediamine (LH2), N,N′-bis(salicylidene)-2,2′-dimethyl-1,3-propanediamine (LDMH2), N,N′-bis(salicylidene)-2-hydroxy-1,3-propanediamine (LOH3), N,N′-bis(2-hydroxyacetophenylidene)-1,3-propanediamine (LACH2) and N,N′-bis(2-hydroxyacetophenone)-2,2′-dimethyl-1,3-propanediamine (LACDMH2) were synthesized and reduced to their phenol-amine form in alcoholic media using NaBH4 (LHH2, LDMHH2, LOHHH2, LACHH2 and LACDMHH2). Heterodinuclear complexes were synthesized using Ni(II), Zn(II) and Cd(II) salts, according to the template method in DMF media. The complex structures were analyzed using elemental analysis, IR spectroscopy, and thermogravimetry. Suitable crystals of only one complex were obtained and its structure determined using X-ray diffraction, NiLACH�CdBr2�DMF2, space group orthorhombic, Pbca, a=20.249, b=14.881, c=20.565 � and Z=8. The heterodinuclear complexes were seen to be of [Ni�ligand�MX2�DMF2] structure (ligand=LH2−, LDMH2−, LOHH2−, LACH2−, LACDMH2−, M=ZnII, CdII, X=Br, I). Thermogravimetric analysis showed irreversible bond breakage of the coordinatively bonded DMF molecules followed by decomposition at this temperature.

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Abstract  

The crystal C81H78N12O6Cd3 was synthesized and its structure was determined by single crystal X-ray diffraction method. The complex crystallizes in the monoclinic system space group P21/n with cell parameters, a=15.959(4) , b=26.222(3) , c=25.907(6) , β=101.60(2). The non-isothermal kinetics of the crystal was studied by use of non-isothermal TG and DTG curves. The kinetic parameters were analyzed by means of integral and differential methods, and mechanism functions of the thermal decomposition reaction for its second step were proposed. The kinetic equation of thermal decomposition is expressed as: dα/dt=Aexp(-E/RT)1.5(1-α)4/3[1/(1-α)1/3-1]−1. The average values of E(kJ mol−1) and lnA/s−1 are 339.25, 43.95, respectively.

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Journal of Thermal Analysis and Calorimetry
Authors: O. Çakırer, E. Eker, Ü. Ergun, E. Gökçınar, L. Tatar Yıldırım, H. Dal, and O. Atakol

Abstract  

Two ONNO type naphtaldehyde derivative Schiff base compounds were reduced and two symmetric phenol-amine ligands containing naphthalene groups were obtained; bis-N,N′[(2-hydroxy-1-naphtyl) methyl]-1,3-propanediamine (NAFLH) and bis-N,N′[(2-hydroxy-1-naphtyl) methyl]-2,2′-dimetyhyl-1,3-propanediamine (NAFLDMH). Homotrinuclear Ni(II) complexes of these ligands were prepared. The solid-state molecular structures of representative nickel complex of NAFLDMH were determined using single crystal X-ray diffraction analysis. The terminal Ni(II) ions were found to be situated in between the donor atoms of the organic ligand. The central Ni(II) ion was observed to be bonded via two different μ-bridges. The phenolic oxygens and carboxylate ion were seen to form two different μ-bridges. TG analysis proved that the compounds have different thermal characteristics than those cited in literature. The complexes showed extreme exothermic degradation reactions in inert atmosphere. The complexes are ruptured with a two stepped exothermic reaction which appears huge heat over 300 °C. The heat appeared in O2 atmosphere is observed to be higher than the heat appeared in inert atmosphere. Revealed heat is observed to be higher than the conventional explosive materials.

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Journal of Thermal Analysis and Calorimetry
Authors: Aliakbar Dehno Khalaji, Sepideh Maghsodlou Rad, Gholamhossein Grivani, and Debasis Das

Cu(II) Schiff base compound . Inorg Chim Acta 2009 362 : 2915 – 2920 10.1016/j.ica.2009.01.016 . 12. Koner , S , Saha , S , Okamoto , K-I , Tuchagues , J-P . A novel

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tetranuclear Cu(II) Schiff base compound . Inorg Chim Acta . 2009 ; 362 : 2915 – 2920 . 10.1016/j.ica.2009.01.016 . 17. Koner , S , Saha , S , Okamoto , K-I , Tuchagues , J-P . A novel

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[Cu2(μ-(3,4,5-meo-ba)2bn)(μ-I)2] n , a new 1D polymeric copper(I) chain

Synthesis, crystal structure, spectral and thermal studies

Journal of Thermal Analysis and Calorimetry
Authors: Aliakbar Dehno Khalaji, Smail Triki, and Debasis Das

reduced Schiff base compounds (M II = Zn II , Cd II ) . J Therm Anal Calorim 2007 90 : 541 – 547 10.1007/s10973-006-7729-5 . 25. Durmus , S , Ergun , U , Jaud , JC , Emregul , KC

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