Synthesis and characterization of manganese(IV) and ruthenium(III) complexes derived from <b> <i>bis</i> </b>(2-hydroxy-1-naphthaldehyde)oxaloyldihydrazone

Singh, Mahesh Kumar; Kar, Nirmal K.; Lal, Ram A.

doi:10.1080/00958970802010583

Cited by 20 publications

(4 citation statements)

References 45 publications

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“…The effective magnetic moment (l eff ) of [Ru(bpy)(tppz)Cl][PF 6 ] 2 was measured to be 1.79 BM at room temperature. The magnitude of l eff is consistent with the expected magnetic moment for octahedral Ru(III) complexes of 1.6-1.97 BM for a low spin d 5 system with S = 1/2) [36][37][38][39][40]. 1 diamagnetic peak position.…”

Section: Paramagnetic Nmr and Effective Magnetic Momentsupporting

confidence: 83%

The mononuclear ruthenium(III)-2,3,5,6-tetrakis(2-pyridyl)pyrazine complex [Ru(bpy)(tppz)Cl][PF6]2: synthesis, crystal structure, electrochemical, and spectroelectrochemical studies

Daryanavard

Hadadzadeh

Khalaji

et al. 2009

Transition Met Chem

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The mononuclear Ru(III) complex, [Ru(bpy)-(tppz)Cl][PF 6 ] 2 .acetylacetone, where tppz is 2,3,5,6-tetrakis(2-pyridyl)pyrazine and bpy is 2,2 0 -bipyridine, has been prepared and characterized by physicochemical and spectroscopic methods, cyclic voltammetry, and single crystal X-ray structure analysis. The coordination around the Ru(III) center is distorted octahedral, with bite angles of 80.70-161.83°for the chelating bpy and tppz ligands. The two pyridyl rings of the bpy ligand are nearly coplanar. UV-vis spectroelectrochemical studies of this complex in acetonitrile showed a reversible redox behavior evaluated by the maintenance of isosbestic points in the UV-vis spectrum for both forward reduction and reverse oxidation processes. Magnetic susceptibility data derived from paramagnetic NMR data revealed an effective magnetic moment of 1.79 BM at room temperature.

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Section: Paramagnetic Nmr and Effective Magnetic Momentsupporting

confidence: 83%

The mononuclear ruthenium(III)-2,3,5,6-tetrakis(2-pyridyl)pyrazine complex [Ru(bpy)(tppz)Cl][PF6]2: synthesis, crystal structure, electrochemical, and spectroelectrochemical studies

Daryanavard

Hadadzadeh

Khalaji

et al. 2009

Transition Met Chem

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“…The methods and instruments used for physical measurements are discussed in our earlier report [25].…”

Section: Physical Measurementsmentioning

confidence: 99%

Synthesis and spectral studies on heterobimetallic complexes of manganese and ruthenium derived from N-(2-hydroxynaphthalen-1-yl)methylenebenzoylhydrazide

Singh

Kar

Lal³

et al. 2009

Journal of Coordination Chemistry

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“…Dihydrazones derived from condensation of o-hydroxyaromatic aldehydes and ketones with acyldihydrazones, aroyldihydrazines, and pyridoyl dihydrazines are potential polyfunctional ligands which can bind with metal ions in various ways giving rise to monometallic, homopolymetallic, and heteropolymetallic complexes depending on the preferred stereochemical disposition of metal and the bonds formed in coordination. A survey of literature reveals that although metal complexes of monoacyl hydrazones, aroyl hydrazones, and pyridoyl hydrazones have been studied in detail [18][19][20][21], those of acyl-, aroyl-, and pyridoyl-dihydrazones have received attention in recent years only [22][23][24][25]. Heterobimetallic complexes derived from dihydrazones are quite meager [23,26] with not a single report of heterobimetallic complexes of dihydrazones containing succinoyl and bulky naphthyl fragments in their molecular skeleton.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of heterobimetallic Ni(II)–Zn(II) complexes from bis(2-hydroxy-1 -naphthaldehyde)succinoyldihydrazone

Lal¹,

Chakraborty²,

Chanu³

et al. 2010

Journal of Coordination Chemistry

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Monometallic zinc(II) and nickel(II) complexes, [Zn(H 2 nsh)(H 2 O)] (1) and [Ni(H 2 nsh)(H 2 O) 2 ](2), have been synthesized in methanol by template method from bis(2-hydroxy-1-naphthaldehyde)succinoyldihydrazone (H 4 nsh). Reaction of monometallic complexes with alternate metal(II) acetates as a transmetallator in 1 : 3 molar ratio resulted in the formation of heterobimetallic complexes [NiZn(nsh)(A) 3 ] and [ZnNi(nsh)(A 0 ) 2 ] (A ¼ H 2 O (3), py (4), 2-pic (5), 3-pic (6), 4-pic (7)), (A 0 ¼ H 2 O (8), py (9), 2-pic (10), 3-pic (11), and 4-pic (12)). The complexes have been characterized by elemental analyzes, mass spectra, molar conductance, magnetic moments, electronic, EPR, and IR spectroscopies. All of the complexes are non-electrolytes. Monometallic zinc(II) is diamagnetic while monometallic nickel(II) complex and all heterobimetallic complexes are paramagnetic. The metal centers in heterobimetallic complexes are tethered by dihydrazone and naphthoxo bridging. Zinc(II) is square pyramidal; nickel(II) is six-coordinate distorted octahedral except [ZnNi(nsh)(A) 2 ], in which nickel(II) has square-pyramidal geometry. The displacement of metal center in monometallic complexes by metal ion has been observed in the resulting heterobimetallic complexes.

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Synthesis and characterization of manganese(IV) and ruthenium(III) complexes derived from bis (2-hydroxy-1-naphthaldehyde)oxaloyldihydrazone

Cited by 20 publications

References 45 publications

The mononuclear ruthenium(III)-2,3,5,6-tetrakis(2-pyridyl)pyrazine complex [Ru(bpy)(tppz)Cl][PF6]2: synthesis, crystal structure, electrochemical, and spectroelectrochemical studies

The mononuclear ruthenium(III)-2,3,5,6-tetrakis(2-pyridyl)pyrazine complex [Ru(bpy)(tppz)Cl][PF6]2: synthesis, crystal structure, electrochemical, and spectroelectrochemical studies

Synthesis and spectral studies on heterobimetallic complexes of manganese and ruthenium derived from N-(2-hydroxynaphthalen-1-yl)methylenebenzoylhydrazide

Synthesis and characterization of heterobimetallic Ni(II)–Zn(II) complexes from bis(2-hydroxy-1 -naphthaldehyde)succinoyldihydrazone

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