Metal-ligand exchange coupling in transition-metal complexes

Cory, Marshall G.; Zerner, Michael C.

doi:10.1021/cr00005a009

Cited by 76 publications

(45 citation statements)

References 16 publications

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“…The insight into the distribution of electrons throughout the complex allows us to address the issue of spin-couplings between metal and ligands. [70,71] …”

Section: Oxidation States and Electron Configurationsmentioning

confidence: 99%

A Theoretical Study of the 3d‐M(smif)₂Complexes: Structure, Magnetism, and Oxidation States

et al. 2011

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We carry out a theoretical investigation of the recently reported M(smif)(2) series1,2 and find a number of interesting phenomena. These include complex potential energy surfaces with near-degenerate stationary points, low-lying states, non-trivial electron configurations, as well as non-innocent ligand behavior. The M(smif)(2) exhibit a delicate balance between geometry and electronic structure, which has implications not only for their reactivity but also for controlling their properties through ligand design. We address methodological issues and show how conceptual quantities such as oxidation states and electronic configurations can be extracted through a simple analysis of the electron and spin densities-without a complicated examination of the underlying orbitals.

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“…The insight into the distribution of electrons throughout the complex allows us to address the issue of spin-couplings between metal and ligands. [70,71] …”

Section: Oxidation States and Electron Configurationsmentioning

confidence: 99%

A Theoretical Study of the 3d‐M(smif)₂Complexes: Structure, Magnetism, and Oxidation States

et al. 2011

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“…The shoulder band is typically credited to 1s, 4d transition 24 . It was exhibited as of now in early hypothetical work 25,26 that exchange coupling of the metal center with ligand states offers ascend to turn permitted spin transitions at low energy. It will be demonstrated that there are states in the scope of 423-427 nm beneath the Q-band excitation for the majority of the metal (1, 4-dithiin) porphyrazines.…”

Section: Preparation Of Tetra 510-dioxo-510-dihydronaphtho[23-b][1mentioning

confidence: 99%

Synthesis, Spectroscopic Studies and Photocatalytic Properties of Tetra (1, 4-dithin) Porphyrazines for Environmental Organic Pollutants Recovery

2017

JCBSC

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“…26 To a solution of 2,7-di-tert-butylpyrene 1 (10 mmol) in CH 2 Cl 2 (40 mL) and CH 3 CN (40 mL) were added NaIO 4 (17.5 g, 81.8 mmol), H 2 O (50 mL), and RuCl 3Á xH 2 O (0.25 g, 1.2 mmol). The dark brown suspension was heated at [30][31][32][33][34][35][36][37][38][39][40] C overnight. The reaction mixture was poured into 500 mL of water, and the organic phase was separated.…”

Section: à6mentioning

confidence: 99%

“…4d transition. 29 It was already demonstrated in early theoretical work, 30,31 that exchange coupling of the metal center with ligand states gives rise to spin-allowed transitions at low energy. It will be shown that there are states in the range of 450-480 nm below the Q-band excitation for all of the M-PyzPz polymers.…”

mentioning

confidence: 99%

Dielectric properties of new fully conjugated 2H‐ and metal‐pyrazinoporphyrazine network polymers

Abdel-Razik

El-Sayed

Hassen

2011

J of Applied Polymer Sci

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2,7-Di-tert-butylpyrene was oxidized to 2,7-di-tert-butylpyrene-4,5,9,10-tetraone. The latter through condensation reaction with vicinal diamine such as diaminomaleodinitrile afforded heterocyclic monomer, 2,7-di-tert-butyl pyrene [4,5][9,10]bis(2,3-pyrazine-5,6-dinitrile), which was cyclotetramerized to the corresponding 2H-and metal-pyrazinoporphyrazine-based network polymers (2H-PyzPz and M-PyzPz, M ¼ Co, Ni, Zn, or Cu). Elemental analytical results, Infrared, and NMR spectral data of the new prepared molecules are consistent with their assigned formulations. Molecular masses and metal contents of the synthesized polymers proved to be of high molecular masses, which confirm the efficiency of tetramerization polymerization and complexation reactions. Dielectric permittivity, e 0 , loss tangent, tan d, and ac conductivity, rac(x), of 2H-PyzPz and M-PyzPz films were studied as a function of temperature and frequency. It was found that dielectric permittivity, e 0 , decreases with the increase of frequency and increases with the increase in temperature. Ac conductivity, rac(x), is found to vary as Bxs and the frequency exponent, s, is less than unity around room temperature indicating a dominant hopping process. On the other hand, rac(T) of all samples is thermally activated with low activation energies.

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Metal-ligand exchange coupling in transition-metal complexes

Cited by 76 publications

References 16 publications

A Theoretical Study of the 3d‐M(smif)₂Complexes: Structure, Magnetism, and Oxidation States

A Theoretical Study of the 3d‐M(smif)₂Complexes: Structure, Magnetism, and Oxidation States

Synthesis, Spectroscopic Studies and Photocatalytic Properties of Tetra (1, 4-dithin) Porphyrazines for Environmental Organic Pollutants Recovery

Dielectric properties of new fully conjugated 2H‐ and metal‐pyrazinoporphyrazine network polymers

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Metal-ligand exchange coupling in transition-metal complexes

Cited by 76 publications

References 16 publications

A Theoretical Study of the 3d‐M(smif)2Complexes: Structure, Magnetism, and Oxidation States

A Theoretical Study of the 3d‐M(smif)2Complexes: Structure, Magnetism, and Oxidation States

Synthesis, Spectroscopic Studies and Photocatalytic Properties of Tetra (1, 4-dithin) Porphyrazines for Environmental Organic Pollutants Recovery

Dielectric properties of new fully conjugated 2H‐ and metal‐pyrazinoporphyrazine network polymers

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A Theoretical Study of the 3d‐M(smif)₂Complexes: Structure, Magnetism, and Oxidation States

A Theoretical Study of the 3d‐M(smif)₂Complexes: Structure, Magnetism, and Oxidation States