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.
Thermal decomposition of complexes of cadmium(II) and mercury(II) with triphenylphosphanes
Verma,Verma,Bhushan,Verma
, p. 725 - 729 (2008/10/09)
A series of substituted triphenylphosphane complexes of the type CdL 2X2 (L= triorthotolylphosphane or trimetatolylphosphane; X=Cl-, Br- or I-) and HgL2X 2 (L=triphenylphosphane or triorthotolylphosphane) was prepared fresh. The thermal decomposition was carried out in air with heating rate programmed at 10°C min-1 and it revealed that the complexes with ortho derivative were less stable and the triphenylphosphane moiety leaves along with halogen in the first step. All the complexes were stable up to 210°C. However, the stability order of the tetrahedral complexes was X=Cl>Br. Values of n, E, lnA and ΔS # have been approximated and compared. Complexes having Br have higher E a, lnA and ΔS # values than that having Cl.
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