Copper(II) complexes of novel tripodal ligands containing phenolate and benzimidazole/pyridine pendants: synthesis, structure, spectra and electrochemical behaviour

Uma, R.; Viswanathan, Rathinam; Palaniandavar, Mallayan; Lakshminarayanan, M.

doi:10.1039/dt9940001219

Cited by 58 publications

(43 citation statements)

References 15 publications

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“…The ligand H 2 pppy was obtained in 27 % yield according to the reported method. [26] The ligand H 2 dnpppy has been reported coordinated as a ligand in copper and iron complexes, [27,28] but not as purified and isolated molecule. Although H 2 dnpppy was obtained in high purity, the overall yield was quite low, being only 14 %.…”

Section: Resultsmentioning

confidence: 99%

The Synthesis, Structures and Characterisation of New Mixed‐Ligand Manganese and Iron Complexes with Tripodal, Tetradentate Ligands

et al. 2008

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The preparation of new manganese and iron complexes with the general formula [M(tripod)(anion)] is described, where M = Fe III or Mn III , "tripod" is a dianionic tetradentate tripodal ligand and the anion is a chelating β-diketonate, 8-oxyquinoline or acetate. The synthesis of this type of complexes was found to be straightforward, which allows for the preparation of a large variety of such coordination compounds. The complexes are characterised by X-ray crystallography, infrared spectroscopy, UV/Vis spectroscopy, cyclic voltammetry and elemental analysis. A correlation between the ligand sets and the electron density at the metal centre in the complexes is

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Section: Resultsmentioning

confidence: 99%

The Synthesis, Structures and Characterisation of New Mixed‐Ligand Manganese and Iron Complexes with Tripodal, Tetradentate Ligands

et al. 2008

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“…The phenolate oxygen binds weakly in the apical position, thus making this complex the first that reproduces the axial Cu II ‐phenolate bond of GO 94. It was initially proposed that the apical coordination of the phenolate is due to the introduction of the nitro substituent para to the phenolate group, as in its absence phenolates occupy the equatorial position 91. The polarity rule, which states that the more electronegative ligand will preferentially occupy the axial position of a tetragonal‐based pyramid, was proposed to account for these results in combination with crystal‐packing forces.…”

Section: Modeling the Properties Of The Go Active Sitementioning

confidence: 99%

Ten Years of a Biomimetic Approach to the Copper(II) Radical Site of Galactose Oxidase

2007

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An overview of recent progress in the modeling of the copper(II)‐phenoxyl entity of the metalloenzyme Galactose Oxidase (GO) is presented. GO is an enzyme that is extremely engineered by nature: its active site exhibits several unusual features, such as a coordinated tyrosyl radical, post‐translationally modified amino acids, and π‐stacked residues. Understanding each of these particularities has posed a challenge for chemists, who have consequently developed several biomimetic complexes during the last decade. The properties of representative complexes are described herein, with special emphasis given to copper(II) complexes involving tripodal ligands. All these biomimetic compounds have been developed with the aim of better understanding biologically relevant problems. I show here that the structural attributes, reactivity, electronic properties, self‐processing, and many other properties of GO can be addressed successfully using model complexes.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

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“…[51,52] Coordination and organometallic complexes of Cu, Ni, and Zn have also been reported. [53][54][55] The Li, Na, and K salts of BPPA were synthesized and K-A C H T U N G T R E N N U N G [BPPA] was shown to be a useful metalating reagent for Related work from Bercaws group examined the tripodal TMDA ligands L k/n-p as well as BPPA with Group 3 metal alkyl complexes for use as ethylene polymerization catalysts ( Figure 14). [57] Through protonolysis reactions of HL k/n-p and…”

Section: Tripodal Ligandsmentioning

confidence: 99%

Use of Tetradentate Monoanionic Ligands for Stabilizing Reactive Metal Complexes

Chomitz¹,

Arnold²

2009

Chemistry A European J

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Ligand scaffolding: The chemist's ability to choose from a wide range of supporting ligands is an important factor in designing new metal complexes. The introduction of new ligand scaffolds with different donor types and coordination numbers allows for the expansion of reaction chemistry at metal centers. This article surveys the use of the tetradentate monoanionic (TMDA) ligands (shown here) with main-group, transition-metal, and f-block elements. Supporting ligand design has played a vital role in the development of coordination and organometallic chemistry. A myriad of ligands with varying charge, donor-type, and denticity have been explored in this realm. A ligand type that has garnered recent attention involves a tetradentate monoanionic (TDMA) framework. TDMA ligands have been used with p-, d-, and f-block elements to form an array of interesting new complexes with applications ranging from bioinorganic chemistry to catalysis. Complexes incorporating TDMA ligands have been shown to stabilize reactive low-valent and cationic species. Functionalized beta-diiminato and TACN derivatives as well as tripodal ligands featuring both hard sigma-donors as well as "mixed-donors" are covered in this review. The synthetic challenges associated with the implementation of each ligand set are discussed.

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Copper(II) complexes of novel tripodal ligands containing phenolate and benzimidazole/pyridine pendants: synthesis, structure, spectra and electrochemical behaviour

Cited by 58 publications

References 15 publications

The Synthesis, Structures and Characterisation of New Mixed‐Ligand Manganese and Iron Complexes with Tripodal, Tetradentate Ligands

The Synthesis, Structures and Characterisation of New Mixed‐Ligand Manganese and Iron Complexes with Tripodal, Tetradentate Ligands

Ten Years of a Biomimetic Approach to the Copper(II) Radical Site of Galactose Oxidase

Use of Tetradentate Monoanionic Ligands for Stabilizing Reactive Metal Complexes

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