N,N′-Chelating biheteroaromatic ligands; a survey

Constable, Edwin C.; Steel, Peter J.

doi:10.1016/0010-8545(89)80016-5

Cited by 274 publications

(119 citation statements)

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“…Metal complexes with bipy ligands have been prepared, probably of all metals known, and numerous variations on the basic ligand 15 framework have been made. [1][2][3] However, one remarkably simple derivative that has been elusive so far is 6,6'-dihydroxy-2,2'-bipyridine (1). A few metal complexes of bipy ligands with hydroxy substituents at other positions have been reported, for example 3,3'-and 4,4'-dihydroxy-2,2'-bipyridine 4,5 and also 6-20 hydroxy-2,2'-bipyridine 6 has been coordinated to a metal centre but, to the best of our knowledge, no reports have appeared on the synthesis of a metal complex containing the 6,6'-dihydroxy-2,2'-bipyridine ligand.…”

mentioning

confidence: 99%

First metal complexes of 6,6′-dihydroxy-2,2′-bipyridine: from molecular wires to applications in carbonylation catalysis

Conifer

Taylor

Law³

et al. 2011

Dalton Trans.

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mentioning

confidence: 99%

First metal complexes of 6,6′-dihydroxy-2,2′-bipyridine: from molecular wires to applications in carbonylation catalysis

Conifer

Taylor

Law³

et al. 2011

Dalton Trans.

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“…Recent years have witnessed a great deal of interest in the synthesis of the pyrimidine compounds because of its higher -acidity [1][2][3] than conventional widely used pyridine bases [4,5] and also due to its biochemical importance [6][7][8][9][10][11]. Pyrimidine is an active component of antibiotics, antimicrobials, anticonvulsants, antispasmatics, antineoplastics (e.g.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric studies on some arylazo diamino pyrimidinol in organic solvents and in buffer solutions

et al. 2014

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KEYWORDSThe spectral behavior of some new arylazo-2,6-diamino-4-pyrimidinol in pure and mixed organic solvents and buffer solutions of varying pH have been studied. The observed bands are assigned to the possible electronic transition. The band appearing in the visible region is assigned to →* transition involving -electronic system of the whole compounds, associated with intramolecular charge transfer. This charge transfer seems to originate from the aryl moiety to the pyrimidine ring which is characterized by accepting character. This behavior can be explained that these compounds exist in the hydroxyazo-quinoid hydrazon tautomreic explained equilibrium. The possibility of the formation of -H-bond solvated molecular complex between the molecule of azo 2,6-diaminopyrimidinol and proton-acceptor solvents of DMSO and DMF molecular were discussed. The pK values of these compounds were determined and on the basis of the relative contribution of acidic basic character of respective species. pK values Mixed solvents Buffer solutions Spectra behavior Molecular complex Arylazo diaminopyrimidinol

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“…Due to its importance in many areas of research, 2,2 -bipyridine has been considered in recent years [21][22][23][24][25]. Recently, a new series of polyimides and co-polyimides based on bipyridine containing diamine has been reported by our group [26].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Some New Thermally Stable Crystalline Polyamides and Co-Polyamides Bearing Bipyridine Side-Chain Groups

Koohmareh

Souri

2011

Designed Monomers and Polymers

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A new series of polyamides and co-polyamides were synthesized via reaction of a newly synthesized bipyridine containing diamine, 4,6-bis(4-aminophenyl)-2,2 -bipyridine, with commercial diacides. The synthesized polymers were characterized by FT-IR and 1 H-NMR spectroscopy. The physical properties of the polymers including solubility and viscosity were studied and the results showed acceptable solubility and good chain growth for the polymers. Thermal stability of these polymers was also studied by thermogravimetric analysis (TGA). The polymers start to lose weight because of thermal degradation at about 350 • C. From differential scanning calorimetry (DSC), the polymers showed a T g between 160 and 180 • C. The morphology of these polymers was also investigated by X-ray diffraction (XRD) and the results showed good crystallinity.

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N,N′-Chelating biheteroaromatic ligands; a survey

Cited by 274 publications

References 114 publications

First metal complexes of 6,6′-dihydroxy-2,2′-bipyridine: from molecular wires to applications in carbonylation catalysis

First metal complexes of 6,6′-dihydroxy-2,2′-bipyridine: from molecular wires to applications in carbonylation catalysis

Spectrophotometric studies on some arylazo diamino pyrimidinol in organic solvents and in buffer solutions

Synthesis and Characterization of Some New Thermally Stable Crystalline Polyamides and Co-Polyamides Bearing Bipyridine Side-Chain Groups

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