7789-42-6Relevant articles and documents
Baxter,Hines,Frevert
, p. 770 - 770 (1906)
Baxter,Grose,Hartmann
, p. 857 - 857 (1916)
A thermochemical study of adducts of 2-pyrrolidone with zinc(III), cadmium(II) and mercury(II) halides
Vieira, Eunice F. S.,Queiroz, Jose C. de,Dias, Francisco S.
, p. 249 - 260 (1995)
The standard molar enthalpies of acid-base reactions in the condensed state (Δ(r)H(0)) of the adducts MX2 . nBuL (where M is Zn, Cd, Hg; Xis Cl, Br, I; n = 1, 2, 3; BuL is 2-pyrrolidone) were determined from e nthalpies of dissolution (Δ(i)H(0)) of metal halide ligands and adducts, at 298.15 K, obtained by calorimetric methods in solution. Using the values of Δ(r)H(0) and auxiliary data from the literature the standard enthalpies of formation (Δ(f)H(0)), decomposition (Δ(d)H(0)) and lattice enthalpy (Δ(latt)H(0)) of these adducts weredetermined. The enthalpy of vaporization of BuL, Δ(vap)H(0)(BuL), was found to be 41.71+/-0.56 kJ mol**-1 and, from this value, the entha lpies of reaction in the gaseous state (Δ(g)H(0)) were estimated. The values of Δ(g)H(0) were used in calculations of the mean dissociation enthalpy of the metal-oxygen bond, D(M-O), of the obtained adducts, and are correlated with energetic parameters of the metal halides.
Investigation on the thermal decomposition some heterodinuclear Ni II-MII complexes prepared from ONNO type reduced Schiff base compounds (M II=ZnII, CdII)
Aksu,Durmus,Sari,Emreguel,Svoboda,Fuess,Atakol
, p. 541 - 547 (2008/10/09)
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 (LACDMH 2) were synthesized and reduced to their phenol-amine form in alcoholic media using NaBH4 (LHH2, LDM HH2, LOHHH2, LACHH 2 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 A and Z=8. The heterodinuclear complexes were seen to be of [Ni?ligand?MX 2?DMF2] structure (ligand=LH2-, LDM H2-, 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.
Cadmium(II) complexes of 1,2-di(imino-4′-antipyrinyl)ethane
Deepa,Madhu,Radhakrishnan
, p. 883 - 888 (2008/10/09)
Cadmium(II) complexes of the Schiff base 1,2-di(imino-4′-antipyrinyl) ethane (GA) having general formulae [Cd(GA)]X2; (X = NO 3-, ClO4-) and [Cd(GA)X 2]; (X = Cl- Br- or I-) have been synthesized and characterized by elemental analysis, electrical conductance in non-aqueous solvents, infrared and electronic spectra as well as thermogravimetric analysis. In all these complexes, GA acts as a neutral tetradentate ligand coordinating through both the carbonyl oxygens and both the azomethine nitrogens. Both the anions are coordinated in the halide complexes while these remain as counter ions in the perchlorate and nitrate complexes. Thermal decomposition behavior of the nitrate complex indicates that it is stable up to 234°C and undergoes a three-stage decomposition pattern yielding the anhydrous Cadmium(II) oxide as the final residue. Copyright
