What question did this study set out to answer?

To synthesize and characterize copper(II) complexes containing the quadridentate N2S2 ligand bmdhp to evaluate their structural geometry, spectral properties, and stability against autoreduction.

January 1, 1984Journal of the Chemical Society Dalton Transactions

Synthesis, structure, and spectroscopic properties of copper(II) compounds containing nitrogen–sulphur donor ligands; the crystal and molecular structure of aqua1,7-bis(N-methylbenzimidazol-2′-yl)-2,6-dithiaheptanecopper(II) perchlorate

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Authors

AAAnthony W. AddisonHoward University TRT. Nageswara RaoUniversity of Hull JRJ. ReedijkUniversité Paris-Sud

Discussion

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Implication

Crystallographic analysis demonstrates intermediate five-coordinate geometry in methylated copper(II) complexes, highlighting the novel tau parameter as a universal index of trigonality.

Key Points

To synthesize and characterize copper(II) complexes containing the quadridentate N2S2 ligand bmdhp to evaluate their structural geometry, spectral properties, and stability against autoreduction.
Synthesized mono- and di-hydrate 1:1 copper(II) complexes using the linear N2S2 donor ligand 1,7-bis(N-methylbenzimidazol-2′-yl)-2,6-dithiaheptane (bmdhp).
Determined crystal structure using single-crystal X-ray diffraction resolved via Patterson, Fourier, and least-squares refinement (3,343 independent reflections, R = 0.047).
Characterized electronic absorption, ligand-field, and electron spin resonance (ESR) spectra across solid states and donor solvents.
Methylation of the ligand produced copper(II) complexes with substantially higher stability against autoreduction compared to non-methylated analogues.
Crystallographic analysis established an irregular five-coordinate copper geometry intermediate between square pyramidal and trigonal bipyramidal, defined as 48% along the distortion pathway via a newly introduced trigonality parameter, tau.
Ligand-field and ESR spectra revealed that the complexes rearrange to adopt tetragonal coordination structures in donor solvents.

Cite This Study

Addison et al. (1984) studied this question.

synapsesocial.com/papers/69d9de0d0d540cafc5837d4e https://doi.org/10.1039/dt9840001349

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January 1, 1984Journal of the Chemical Society Dalton Transactions

Synthesis, structure, and spectroscopic properties of copper(II) compounds containing nitrogen–sulphur donor ligands; the crystal and molecular structure of aqua1,7-bis(N-methylbenzimidazol-2′-yl)-2,6-dithiaheptanecopper(II) perchlorate

View Full Paper

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Authors

AAAnthony W. AddisonHoward University TRT. Nageswara RaoUniversity of Hull JRJ. ReedijkUniversité Paris-Sud

Discussion

Member takes

Implication

Crystallographic analysis demonstrates intermediate five-coordinate geometry in methylated copper(II) complexes, highlighting the novel tau parameter as a universal index of trigonality.

Key Points

To synthesize and characterize copper(II) complexes containing the quadridentate N2S2 ligand bmdhp to evaluate their structural geometry, spectral properties, and stability against autoreduction.
Synthesized mono- and di-hydrate 1:1 copper(II) complexes using the linear N2S2 donor ligand 1,7-bis(N-methylbenzimidazol-2′-yl)-2,6-dithiaheptane (bmdhp).
Determined crystal structure using single-crystal X-ray diffraction resolved via Patterson, Fourier, and least-squares refinement (3,343 independent reflections, R = 0.047).
Characterized electronic absorption, ligand-field, and electron spin resonance (ESR) spectra across solid states and donor solvents.
Methylation of the ligand produced copper(II) complexes with substantially higher stability against autoreduction compared to non-methylated analogues.
Crystallographic analysis established an irregular five-coordinate copper geometry intermediate between square pyramidal and trigonal bipyramidal, defined as 48% along the distortion pathway via a newly introduced trigonality parameter, tau.
Ligand-field and ESR spectra revealed that the complexes rearrange to adopt tetragonal coordination structures in donor solvents.

Cite This Study

Addison et al. (1984) studied this question.

synapsesocial.com/papers/69d9de0d0d540cafc5837d4e https://doi.org/10.1039/dt9840001349

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