77061-39-3Relevant academic research and scientific papers
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.
Far-infrared, raman, and 31P nuclear magnetic resonance spectral investigation of the electronic effects in triarylphosphine complexes of cadmium(II) halides
Goel, Ram G.,Henry, William P.,Srivastava, Ramesh C.
, p. 1727 - 1731 (2008/10/08)
The complexes CdX2[P(p-YC6H4)3]2 and CdX2[P(m-CH3C6H4)3] 2, where X = Cl, Br, or I and Y = H, CH3, CH3O, or (CH3)2N, have been synthesized, and their far-infrared, Raman, and 31P NMR spectra have been examined. The vibrational spectral data are in accord with a pseudotetrahedral structure of C2v skeletal symmetry in the solid state. The molecular nature of the complexes, in solution, is established by molecular weight measurements in 1,2-dichloroethane. The 31P NMR spectra of the complexes in dichloromethane at ambient temperatures consist of a single broad resonance, indicating fast phosphine exchange on the NMR time scale. The satellites due to the 113Cd-31P and 111Cd-31P spin-spin couplings are observed for all the complexes except CdCl2(PPh3)2 at lower temperatures. For the complexes of a given phosphine, the magnitude of cadmium-phosphorus nuclear spin-spin coupling increases linearly with the Pauling's electronegativity of X. For the given halide, the coupling constants increase linearly with the pKa value of the phosphine. No simple relationship between the 31P chemical shifts and other parameters is observed.
