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Vol. 28 No. 3 (2016): Vol 28 Issue 3

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Synthesis and Characterization of Some Dimeric Platinum Metal Complexes with N,N,N',N'-Tetrakis(2-pyridylmethyl)benzene-1,4-diamine

https://doi.org/10.14233/ajchem.2016.19437
Surajit Chakrabarty
Department of Chemistry, Government Degree College, Dharmanagar-799 250, India
Shoumik Bhattacharjee
Department of Chemistry, Ledrai Dewan Class XII School, Machmara, Kumarghat-799 264, India
Afzal Hussain Sheikh
Department of Chemistry, Nabin Chandra College, Badarpur-788 806, India
Aziz Ahmed
Department of Chemistry, Indian Institute of Technology, Patna-800 013, India
Subrata Pal
OSD, District School Education Office, Dharmanagar-799 250, India
Prashanta Sarkhel
Department of Chemistry, St. Edmunds College, Shillong-793 022, India

Corresponding Author(s) : Surajit Chakrabarty

surajit_chakrabarty@yahoo.co.in

Asian Journal of Chemistry, Vol. 28 No. 3 (2016): Vol 28 Issue 3

Abstract

Dinuclear platinum metal complexes [M2(1,4-tpbd)Cl2]Cl2 (where, M = Pd or Pt and 1,4-tpbd = N,N,N',N'-tetrakis(2-pyridylmethyl)benzene-1,4-diamine), [Ru2(1,4-tpbd)(DMSO)2Cl4] and [Rh2(1,4- tpbd)(PPh3)2Cl2] were synthesized from their precursors PdCl2, K2PtCl4, [Ru(DMSO)4Cl2] and [Rh(PPh3)3Cl2] respectively. The composition and the expected structures of the complexes have been discussed in view of their data obtained from various analytical, magnetic moment, molar conductance, UV-visible, FT-IR and 1H NMR spectroscopic studies. [M2(1,4-tpbd)Cl2]Cl2 (where, M = Pd or Pt) complexes were expected to have distorted square-planar geometries, in which the coordination of the ligand 1,4-tpbd to the metal ions occurs through all the N atoms in a bis-tridentate bridging fashion. The complex [Rh2(1,4-tpbd)(PPh3)2Cl2], a square-planar geometry was proposed, in which the ligand 1,4-tpbd bonded through two N-atoms of the picolyl group, one chlorine atom and one triphenylphosphine group per rhodium atom. An octahedral structure was proposed to the complex [Ru2(1,4-tpbd)(DMSO)2Cl4]. The electronic spectra of all the complexes were dominated by strong charge transfer bands indicative of binding of 1,4-tpbd ligand in a bridging manner to the metal centers. For the [Rh2(1,4-tpbd)(PPh3)2Cl2 complex in dichloromethane, a reversible peak at E½ = 0.39 V and DEp = 80 mV was observed, which may be assigned to two electrons RhI/RhIII oxidation couple.

Keywords

Dimeric N,N,N',N'-Tetrakis(2-pyridylmethyl)benzene-1,4-diamine) UV-visible 1H NMR Cyclic voltammetry
Chakrabarty, S., Bhattacharjee, S., Sheikh, A. H., Ahmed, A., Pal, S., & Sarkhel, P. (2015). Synthesis and Characterization of Some Dimeric Platinum Metal Complexes with N,N,N’,N’-Tetrakis(2-pyridylmethyl)benzene-1,4-diamine. Asian Journal of Chemistry, 28(3), 622–626. https://doi.org/10.14233/ajchem.2016.19437
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