Thermogravimetric Study of Ionic Pt(II) Complexes Containing Bis(Diphenylthiophosphinyl)Methane

The TG-DTG and DTA study of dipositive platinum(II) complexes of the general formula [Pt(L-L)(dppmS2)](ClO4)2, where dppmS2 = Ph2P(S)CH2P(S)Ph2 and L-L = dppm (Ph2PCH2PPh2), dppe (Ph 2PCH2CH2PPh2), and dppp (Ph 2PCH2CH2CH2PPh2), were studied by thermogravimetric analysis from ambient temperature to 1000°C in nitrogen atmosphere. The decomposition occurred in one stage for [Pt(L-L)dppmS2](ClO4)2, [Pt(L-L)dpppS 2](ClO4)2 and [Pt(L-L)dppmS2] (ClO4)2 complexes. The values of activation energy, E, frequency factor, A, reaction order, n, entropy change, ΔS≠, enthalpy change, ΔH≠, and Gibss free energy change, ΔG≠, of the thermal decomposition were calculated by means of Coats-Redfern method (CR), MacCallum-Tanner method (MC) and van Krevelen method (vK). The activation energy values obtained by CR, MC and vK methods were in good agreement with each other

Thermal Study of Pd(II) Complexes Containing Bis-(Diphenylthiophosphenyl) Methane

The TG-DTG and DTA study of dipositive palladium(II) complexes of the general formula [Pt(L-L)(dppmS2)](ClO4)2, where dppmS2 = Ph2P(S)CH2P(S)Ph2 and L-L = dppm (Ph2PCH2PPh2), dppe (Ph 2PCH2CH2PPh2) and dppp (Ph 2PCH2CH2CH2PPh2), were studied by thermogravimetric analysis from ambient temperature to 1273 K in nitrogen atmosphere. The decomposition occurred in one stage for all complexes. The values of activation energy, E, frequency factor, A, reaction order, n, entropy change, ΔS≠, enthalpy change, ΔH ≠ and Gibss free energy, ΔG≠ of the thermal decomposition were calculated by means of Coats-Redfern (CR), MacCallum-Tanner (MC) and Horowitz-Metzger (HM) methods. The activation energy value obtained by CR, MC and HM methods were in good agreement with each other

Preparation and crystallographic characterization of Pd(II) complexes containing imidobis(diphenylthiophosphinato) ligand

WOS: 000249905900011The reactions of PdCl2(L-L) [L-L = Ph2PCH2PPh2(dppm), Ph2PCH2CH2PPh2(dppe) and Ph2PCH2CH2CH2PPh2(dppp)] with equivalent amount of (Ph2P(S)NHP(S)Ph-2)(dppaS(2)) gave the complexes [Pd(L-L)(dppaS(2)-H)]ClO4 [L-L = dppm (1), dppe (2), dppp (3)]. The different synthetic route was used for complex 2 by using of Pd(dppe)Cl-2 and K[N(PSPh2)(2)] as starting materials (2a). All of these complexes have been characterized P-31{H-1} NMR, IR and elemental analyses. The complexes 2, 2a and 3 were crystallographically characterized. The coordination geometry around the Pd atoms in these complexes distorted square planar. Six membered dppaS2-H rings are twist boat conformations in three complexes. (C) 2007 Elsevier Ltd. All rights reserved

Chelated palladium and platinum complexes of diphosphinite ligands, ch₂(o-c₆h₄opph₂)₂ and ph₂po(ch₂)₃opph₂: characterization and catalytic activity

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