Abstract
A series of new mixed copper(II) chelates with N,N,N′,N′-tetramethylethylenediamine (TMEN) and various β-diketonate ions of the general formula [Cu TMEN(β-dik)] X. nH2O(β-dik = aca, bzaca, dbm, taa, hfa or dpm; X = ClO4 - or NO3 -; n = 1 2 or 0) were prepared. The magnetic moments, infrared spectra, and reflection spectra of their solids and the visible absorption spectra and electric conductivities of their organic solutions were measured, and the effects of the substituent groups in the β-diketonate ions, and those of the anions and solvents, on the electronic state and strengths of the coordinate bonds in the chelate cations were studied. The obtained results indicate that the magnitudes of ligand field splitting in these chelates strongly depend on the nature of the substituent groups, being particularly small in the chelates with fluorinated diketones. Further they show that there is a very obvious relation between these magnitudes and coordination abilities of the solvents expressed in their donor numbers. In most of the cases studied, ionization and solvation of the chelate cation of the type [Cu TMEN(β-dik)]X + 2S ⇄ [Cu TMEN (β-dik)S2]+ + X- (S = solvent molecule) seem to occur in organic solutions. However, in a highly non-polar solvent like 1,2-dichloroethane, anion coordination seems to occur.
| Original language | English |
|---|---|
| Pages (from-to) | 1265-1270 |
| Number of pages | 6 |
| Journal | Journal of Inorganic and Nuclear Chemistry |
| Volume | 36 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1974 |
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Studies on mixed chelates-III. Mixed copper(II) chelates with N,N,N′,N′-tetramethylethylenediamine and β-diketones[1]. / Fukuda, Yutaka; Shimura, Akiko; Mukaida, Masako; Fujita, Etsuko; Sone, Kozo.
In: Journal of Inorganic and Nuclear Chemistry, Vol. 36, No. 6, 1974, p. 1265-1270.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Studies on mixed chelates-III. Mixed copper(II) chelates with N,N,N′,N′-tetramethylethylenediamine and β-diketones[1]
AU - Fukuda, Yutaka
AU - Shimura, Akiko
AU - Mukaida, Masako
AU - Fujita, Etsuko
AU - Sone, Kozo
PY - 1974
Y1 - 1974
N2 - A series of new mixed copper(II) chelates with N,N,N′,N′-tetramethylethylenediamine (TMEN) and various β-diketonate ions of the general formula [Cu TMEN(β-dik)] X. nH2O(β-dik = aca, bzaca, dbm, taa, hfa or dpm; X = ClO4 - or NO3 -; n = 1 2 or 0) were prepared. The magnetic moments, infrared spectra, and reflection spectra of their solids and the visible absorption spectra and electric conductivities of their organic solutions were measured, and the effects of the substituent groups in the β-diketonate ions, and those of the anions and solvents, on the electronic state and strengths of the coordinate bonds in the chelate cations were studied. The obtained results indicate that the magnitudes of ligand field splitting in these chelates strongly depend on the nature of the substituent groups, being particularly small in the chelates with fluorinated diketones. Further they show that there is a very obvious relation between these magnitudes and coordination abilities of the solvents expressed in their donor numbers. In most of the cases studied, ionization and solvation of the chelate cation of the type [Cu TMEN(β-dik)]X + 2S ⇄ [Cu TMEN (β-dik)S2]+ + X- (S = solvent molecule) seem to occur in organic solutions. However, in a highly non-polar solvent like 1,2-dichloroethane, anion coordination seems to occur.
AB - A series of new mixed copper(II) chelates with N,N,N′,N′-tetramethylethylenediamine (TMEN) and various β-diketonate ions of the general formula [Cu TMEN(β-dik)] X. nH2O(β-dik = aca, bzaca, dbm, taa, hfa or dpm; X = ClO4 - or NO3 -; n = 1 2 or 0) were prepared. The magnetic moments, infrared spectra, and reflection spectra of their solids and the visible absorption spectra and electric conductivities of their organic solutions were measured, and the effects of the substituent groups in the β-diketonate ions, and those of the anions and solvents, on the electronic state and strengths of the coordinate bonds in the chelate cations were studied. The obtained results indicate that the magnitudes of ligand field splitting in these chelates strongly depend on the nature of the substituent groups, being particularly small in the chelates with fluorinated diketones. Further they show that there is a very obvious relation between these magnitudes and coordination abilities of the solvents expressed in their donor numbers. In most of the cases studied, ionization and solvation of the chelate cation of the type [Cu TMEN(β-dik)]X + 2S ⇄ [Cu TMEN (β-dik)S2]+ + X- (S = solvent molecule) seem to occur in organic solutions. However, in a highly non-polar solvent like 1,2-dichloroethane, anion coordination seems to occur.
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U2 - 10.1016/0022-1902(74)80062-X
DO - 10.1016/0022-1902(74)80062-X
M3 - Article
VL - 36
SP - 1265
EP - 1270
JO - Polyhedron
JF - Polyhedron
SN - 0277-5387
IS - 6
ER -