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Synthesis and structural study of platinum group metal complexes containing pyrimidine bridged pyrazolyl-pyridine ligand and η 5 and η 6 – cyclic hydrocarbons

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Abstract

The mononuclear compounds [(η6-arene)Ru(bppm)Cl]PF6{bppm = 4,6-bis{3-(2-pyridyl)-1H-pyrazol-1-yl}pyrimidine; arene = C6 H 6, [1]; p- iPrC6 H 4Me, [2]; C6Me6, [3]}, [CpRu(bppm)(PPh3)]PF6{Cp = η5-C5 H 5, [4]; η5-C5Me5, [5]; η5-C9 H 7, [6]} and [Cp*M(bppm)Cl]PF6 {M = Rh [7]; Ir [8]} have been synthesized from the reaction of 4,6-bis{3-(2-pyridyl)-1H-pyrazol-1-yl}pyrimidine (bppm) and the corresponding precursor metal complexes [(η6-arene)Ru(μ-Cl)Cl]2, [CpRu(PPh3)2Cl] and [Cp*M(μ-Cl)Cl]2, respectively, in the presence of NH4 PF 6. They were characterized by the following techniques viz. IR, NMR, mass spectrometry and UV-visible spectroscopy. The molecular structures of [2] and [7] have been established by single crystal X-ray structure analyses.

The reaction of [(η6-arene)Ru(μ-Cl)Cl]2, [CpRu(PPh3)2Cl] and [Cp*M(μ-Cl)Cl]2 {M = Rh, Ir} with the ligand bppm and NH4PF6 afforded only mononuclear complexes

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Acknowledgements

K M Rao is grateful to UGC and CSIR, New Delhi for the financial support received vide research grants No.F.No.39-793/2010 (SR) and 01(2493)/11/EMR-II, respectively.

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Authors and Affiliations

  1. Department of Chemistry, MIC College of Technology, Kanchikacherla, Vijayawada, 521 180, India

    THIRUMALA PRASAD KOTA

  2. Department of Chemistry, North Eastern Hill University, Shillong, 793 022, India

    MOHAN RAO KOLLIPARA

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  1. THIRUMALA PRASAD KOTA
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  2. MOHAN RAO KOLLIPARA
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Correspondence to MOHAN RAO KOLLIPARA.

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Supplementary Information

CCDC-752869 for [2] and CCDC-752870 for [7] contain the supplementary crystallographic data of this work, that can be obtained free of charge via www.ccdc.cam.ac.uk/data_request/cif, by e-mailing data request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Center, 12 Union Road, Cambridge CB2 1EZ, UK; fax: +44 1223 336033.

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KOTA, T.P., KOLLIPARA, M.R. Synthesis and structural study of platinum group metal complexes containing pyrimidine bridged pyrazolyl-pyridine ligand and η 5 and η 6 – cyclic hydrocarbons. J Chem Sci 126, 1143–1151 (2014). https://doi.org/10.1007/s12039-014-0667-z

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