Comparison of coordination mode of some biphosphine ligands in cyclometalated organoplatinum(II) complexes

Esmaeilbeig, Ahmad R.; Haghighi, Mohsen Golbon; Nikahd, Sahebeh; Hashemi, S. Rasoul; Mosarezaee, Mohammad; Rashidi, Mehdi; Nabavizadeh, S. Masoud

doi:10.1016/j.jorganchem.2014.01.008

Cited by 13 publications

(4 citation statements)

References 30 publications

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“…6 In this context, some of various C^N cycloplatinated(II) complexes with aryl ligands (p-tolyl, p-anisole, phenyl) and their reactions have been reported in the literature. [7][8][9][10][11][12] To the best of our knowledge, the presence of aryl groups as ancillary ligands in the rollover cycloplatinated(II) complexes is very scarce in the published resources. 13 In this way, thermal rearrangement of the complex [Pt(bpy)(Ar)2] (bpy = 2,2´-bipyridine, Ar = C6H5, p-t Bu-C6H4 and p-CF3-C6H4) results in the formation of three-coordinated monoaryl [Pt(C^N)(Ar)] intermediates via rollover cycloplatination process.…”

Section: Introductionmentioning

confidence: 99%

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Reactivity of a new aryl cycloplatinated(ii) complex containing rollover 2,2′-bipyridine N-oxide toward a series of diphosphine ligands

et al. 2018

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Section: Introductionmentioning

confidence: 99%

“…Figure 1 shows three different possible modes of binding for diphosphines in cycloplatinated(II) complexes. 8,9,11,[33][34][35][36][37][38][39][40][41][42][43][44] Figure 1. Different binding modes for diphosphine ligands in cycloplatinated(II) complexes.…”

Section: Introductionmentioning

confidence: 99%

Reactivity of a new aryl cycloplatinated(ii) complex containing rollover 2,2′-bipyridine N-oxide toward a series of diphosphine ligands

et al. 2018

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“…2 A similar bond cleavage reaction has been observed in analogues cycloplatinated(II) complexes. 6,10,31,[39][40][41] Complexes 1 and 2 are air-stable and obtained in high yields. They are soluble in halogenated solvents such as CH2Cl2 or CHCl3 and stable for several days at room temperature in the solution.…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Cyclometalated platinum(ii) complexes of 2,2′-bipyridine N-oxide containing a 1,1′-bis(diphenylphosphino)ferrocene ligand: structural, computational and electrochemical studies

et al. 2017

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The preparation and characterization of new heteronuclear-platinum(ii) complexes containing a 1,1'-bis(diphenylphosphino)ferrocene (dppf) ligand are described. The reaction of the known starting complex [PtMe(κN,C-bipyO-H)(SMe)], A, in which bipyO-H is a cyclometalated rollover 2,2'-bipyridine N-oxide, with the dppf ligand in a 2 : 1 ratio or an equimolar ratio led to the formation of the corresponding binuclear complex [PtMe(κN,C-bipyO-H)(μ-dppf)], 1, or the mononuclear complex [PtMe(κC-bipyO-H)(dppf)], 2, respectively. According to the reaction conditions, the dppf ligand in 1 and 2 behaves as either a bridging or chelating ligand. All complexes were characterized by NMR spectroscopy. The solid-state structure of 2 was determined by the single-crystal X-ray diffraction method and it was shown that the chelating dppf ligand in this complex was arranged in a "synclinal-staggered" conformation. Also, the occurrence of intermolecular C-HO interactions in the solid-state gave rise to an extended 1-D network. The electronic absorption spectra and the electrochemical behavior of these complexes are discussed. Density functional theory (DFT) was used for geometry optimization of the singlet states in solution and for electronic structure calculations. The analysis of the molecular orbital (MO) compositions in terms of occupied and unoccupied fragment orbitals in 2 was performed.

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“…Bidentate ligands with their steric hindrance reduces the transfer of negative charge on Pt (II) central metal and stabilizes this center toward oxidation reaction . Oxidative addition of various reagents, including alkyl and allyl halides to organoplatinum (II) complexes bearing diimine ligands such as bipy (2,2′‐bipyridine) and phen (1,10‐phenanthroline) leads to fabrication of organoplatinum (IV) complexes . Kinetic studies of colorful diimine Pt (II) complexes are facile due to characteristic sharp metal‐to‐ligand charge transfer (MLCT) bands in the visible region .…”

Section: Introductionmentioning

confidence: 99%

Oxidative addition of 1,4‐dichloro‐2‐butyne to an organoplatinum complex: A new precursor for synthesis of ultrasmall Pt nanoparticles thin film at liquid/liquid interface as the electrocatalyst in methanol oxidation reaction

Sadri

Hoseini

2019

Applied Organom Chemis

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In this study, the usage of ClCH2CCCH2Cl alkyne as a reagent for the oxidative addition reaction with organoplatinum‌(II) complex [PtMe2(bipy)] (1), in which bipy = 2,2′‐bipyridine to give a mixture including of trans‐[PtClMe2(CH2CCCH2Cl)(bipy)] (2a) and a cis‐[PtClMe2(CH2CCCH2Cl)(bipy)] (2b) complexes is reported. Kinetic study was investigated by monitoring the disappearance of the metal‐to‐ligand charge transfer (MLCT) band in the UV–Vis spectra. 1H NMR experimental results confirmed that trans isomer (2a) is more stable than its corresponding cis isomer. A liquid–liquid planar interface has been employed as a template for self‐assembly of platinum nanoparticles. The as prepared complex was applied for the synthesis of platinum thin film that characterized by transmission electron microscopy (TEM), X‐ray diffraction (XRD), energy dispersive analysis of X‐rays (EDAX), field emission‐scanning electron micrographs (FE‐SEM) and elemental mapping. The electrocatalytical activity of Pt thin film was investigated in methanol oxidation reaction.

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Comparison of coordination mode of some biphosphine ligands in cyclometalated organoplatinum(II) complexes

Cited by 13 publications

References 30 publications

Reactivity of a new aryl cycloplatinated(ii) complex containing rollover 2,2′-bipyridine N-oxide toward a series of diphosphine ligands

Reactivity of a new aryl cycloplatinated(ii) complex containing rollover 2,2′-bipyridine N-oxide toward a series of diphosphine ligands

Cyclometalated platinum(ii) complexes of 2,2′-bipyridine N-oxide containing a 1,1′-bis(diphenylphosphino)ferrocene ligand: structural, computational and electrochemical studies

Oxidative addition of 1,4‐dichloro‐2‐butyne to an organoplatinum complex: A new precursor for synthesis of ultrasmall Pt nanoparticles thin film at liquid/liquid interface as the electrocatalyst in methanol oxidation reaction

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