Syntheses, structures, and properties of tricarbonyl rhenium(I) heteronuclear complexes with the multidentate bridging ligand containing bis(2-pyridine) and carboxylic acid

Peng, Yan-Hong; Li, Yujia; Li, Chenghui; Hu, Liang; Zuo, Jing‐Lin; You, Xiao‐Zeng

doi:10.1016/j.ica.2010.05.028

Cited by 5 publications

(4 citation statements)

References 44 publications

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“…The mean Cu···C distance and the Cu–O eq –C three-legged scattering path were refined to 3.03(2) and 3.18(4) Å, respectively, which corresponds to a Cu–O–C bond angle of 128(2)°, assuming a O–C bond distance of 1.39 Å, which is in full agreement with the bond angles in the reported solid solvates. 67 − 70 Zitolo and D’Angelo have reported an EXAFS and MXAN analysis of the methanol solvated copper(II) ion in solution. They tested two models, a tetragonally elongated square-pyramidal and a centrosymmetric Jahn–Teller distorted-octahedral configuration, showing that the tetragonally elongated square pyramid did fit best with a mean Cu–O eq bond distance of 1.98 Å, a Cu–O ax distance of 2.27 Å, and a mean Cu–O eq –C bond angle of 129.5°.…”

Section: Results and Discussionmentioning

confidence: 99%

“…1.96 Å and two significantly different axial Cu–O bond distances. No homoleptic copper(II) methanol solvate has been reported in the solid state, and only four copper(II) complexes with four bound methanol molecules have been reported. − The mean Cu–O eq bond distance in the methanol-solvated copper(II) ion in solution has been refined to 1.975(4) Å, and the Cu–O ax bond distances have been refined to 2.202(8) and 2.34(1) Å. The mean Cu···C distance and the Cu–O eq –C three-legged scattering path were refined to 3.03(2) and 3.18(4) Å, respectively, which corresponds to a Cu–O–C bond angle of 128(2)°, assuming a O–C bond distance of 1.39 Å, which is in full agreement with the bond angles in the reported solid solvates. − Zitolo and D’Angelo have reported an EXAFS and MXAN analysis of the methanol solvated copper(II) ion in solution.…”

Section: Results and Discussionmentioning

confidence: 99%

“…No homoleptic copper(II) methanol solvate has been reported in the solid state, and only four copper(II) complexes with four bound methanol molecules have been reported. − The mean Cu–O eq bond distance in the methanol-solvated copper(II) ion in solution has been refined to 1.975(4) Å, and the Cu–O ax bond distances have been refined to 2.202(8) and 2.34(1) Å. The mean Cu···C distance and the Cu–O eq –C three-legged scattering path were refined to 3.03(2) and 3.18(4) Å, respectively, which corresponds to a Cu–O–C bond angle of 128(2)°, assuming a O–C bond distance of 1.39 Å, which is in full agreement with the bond angles in the reported solid solvates. − Zitolo and D’Angelo have reported an EXAFS and MXAN analysis of the methanol solvated copper(II) ion in solution. They tested two models, a tetragonally elongated square-pyramidal and a centrosymmetric Jahn–Teller distorted-octahedral configuration, showing that the tetragonally elongated square pyramid did fit best with a mean Cu–O eq bond distance of 1.98 Å, a Cu–O ax distance of 2.27 Å, and a mean Cu–O eq –C bond angle of 129.5° .…”

Section: Results and Discussionmentioning

confidence: 99%

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EXAFS Study on the Coordination Chemistry of the Solvated Copper(II) Ion in a Series of Oxygen Donor Solvents

et al. 2020

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The structures of the solvated copper(II) ion in water and nine organic oxygen donor solvents with similar electron-pair donor ability, but with different space-demanding properties at coordination, have been studied by EXAFS. N,N′ -Dimethylpropyleneurea and N,N,N′,N′ -tetramethylurea are sufficiently space demanding at coordination to make the axial positions not accessible, resulting in square-planar copper(II) solvate complexes with an intense green color. The mean Cu–O bond distances in these two solvate complexes are 1.939(3) and 1.935(3) Å, respectively. The best fits of the remaining solvates, which are light blue in different hues, are obtained with a Jahn–Teller distorted-octahedral model consisting of four strongly bound solvent molecules in the equatorial positions at 1.96(2) Å and two in the axial positions but with different Cu–O ax bond distances: ca. 2.15 and 2.32 Å. This is in agreement with observations in solid-state structures of compounds containing hexaaquacopper(II) complexes crystallizing in noncentrosymmetric space groups and all reported crystal structures containing a [Cu(H 2 O) 5 (O-ligand)] complex with Jahn–Teller distortion. Such a structure is in agreement with previous EPR and EXAFS studies proving the hydrated copper(II) ion to be a noncentrosymmetric complex in aqueous solution. The refinements of the EXAFS data of the solids [Cu(H 2 O) 6 ](ClO 4 ) 2 , [Cu(H 2 O) 6 ](BrO 3 ) 2 , [Cu(H 2 O) 6 ]SiF 6 , Cu(NO 3 ) 2 ·2.5H 2 O, and CuSO 4 ·5H 2 O gave Cu–O bond distances significantly different from those reported in the crystallographic studies but similar to the configuration and bond distances in the hydrated copper(II) ion in aqueous solution. This may depend on whether the orientation of the axial positions is random in one or three dimensions, giving a mean structure of the solid with symmetry higher than that of the individual complexes. This study presents the very first experimental data from the new X-ray absorption spectroscopy beamline Balder at the MAX IV synchrotron radiation facility in Lund, Sweden, as well as the utilized properties of the beamline.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

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EXAFS Study on the Coordination Chemistry of the Solvated Copper(II) Ion in a Series of Oxygen Donor Solvents

et al. 2020

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“…[14][15][16][17][18][19][20][21]33,34] FIG Excitation of the complexes at 451-452 nm leads to the observation of the emission bands at 637-649 nm (Table 4, Figure 3). With reference to previous spectroscopic studies on other similar rhenium(I) complexes, [40][41][42][43][44] the emission was assigned as derived from excited states of a 3 MLCT origin. Consistent with the UV-vis absorption spectra, the emission bands are approximately insensitive to the substituent on the phenyl ring of ligands in the complexes 1-4.…”

Section: Absorption and Emission Propertiesmentioning

confidence: 99%

Tricarbonylrhenium(I) Bromide Complexes With Diimine Ligands: Structural, Electrochemical, and Spectroscopic Studies

Dehghanpour

Aleesha

2012

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-

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Four rhenium(I) complexes, [Re(CO) 3 Br(L n )] (n = 1-4), [L n = (4-fluorophenyl)pyridin-2-ylmethyleneamine (L 1 ), (4-chlorophe nyl)pyridin-2-ylmethyleneamine (L 2 ), (4-bromophenyl)pyridin-2-ylmethyleneamine (L 3 ), and (4-iodophenyl)pyridin-2-ylmethylenea mine, (L 4 )] have been synthesized and characterized by CHN analyses, 1 H, 13 C-NMR, IR, and UV-vis spectroscopy. The molecular structure of [Re(CO) 3 Br(L 1 )] is a distorted octahedron around rhenium with one Br, facial arrangement of three COs, and one diimine. UV-vis absorption and emission properties of the complexes have been studied at room temperature and the redox potentials are approximately insensitive to the substituent on the phenyl ring of ligands.

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Organometallic Complexes of Pyridines Together with Diverse Heterocycles as Ligands

Sadimenko

2013

Advances in Heterocyclic Chemistry

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Syntheses, structures, and properties of tricarbonyl rhenium(I) heteronuclear complexes with the multidentate bridging ligand containing bis(2-pyridine) and carboxylic acid

Cited by 5 publications

References 44 publications

EXAFS Study on the Coordination Chemistry of the Solvated Copper(II) Ion in a Series of Oxygen Donor Solvents

EXAFS Study on the Coordination Chemistry of the Solvated Copper(II) Ion in a Series of Oxygen Donor Solvents

Tricarbonylrhenium(I) Bromide Complexes With Diimine Ligands: Structural, Electrochemical, and Spectroscopic Studies

Organometallic Complexes of Pyridines Together with Diverse Heterocycles as Ligands

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