Normal sulphites of metals

Salib, Kamal A. R.; El-Maraghy, Salah B.; El-Wafa, Samy M. Abu; El-Sayed, Saied M.

doi:10.1007/bf01098236

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…The ±OH protons (ethanolamine tail) resonate as singlets at 5.85 ppm (B1), 5.0 ppm (B2), and 4.8 ppm (B3). The ±CH 2 ± 6 =CH± protons appear as singlets at 6.9 ppm (B1), 5.8 ppm (B2), and 5.0 ppm (B3) [20]. Finally, the enolic ±OH protons resonate as singlets at 11.5 ppm (B1), 11.4 ppm (B2), and 10.7 ppm (B3) [19].…”

Section: Ligand Characterizationmentioning

confidence: 90%

Schiff Bases of Acetone Derivatives: Spectroscopic Properties and Physical Constants

Ibrahim

Sallam

Orabi

et al. 1998

Monatshefte fuer Chemie

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Schiff bases of acetylacetone, benzoylacetone, dibenzoylmethane, and thienoyltri¯uoro-acetone with ethanolamine and 2-aminophenol were synthesized and characterized by elemental analysis, infrared and 1 H NMR spectra. Dissociation constants of the synthesized ligands were determined in methanol-water and at an ionic strength of 0.1 M KNO 3 at different temperatures; the associated thermodynamic parameters were calculated. Single crystals of one of the ligands were prepared; the X-ray diffraction pattern was analyzed. Thermal analyses of the investigated ligands were performed and correlated with the ligand structure.

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Section: Ligand Characterizationmentioning

confidence: 90%

Schiff Bases of Acetone Derivatives: Spectroscopic Properties and Physical Constants

Ibrahim

Sallam

Orabi

et al. 1998

Monatshefte fuer Chemie

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“…As part of studies directed towards the synthesis of selenitoammine cobaltate(III) complexes, the reaction of carbonatotetrammine cobaltate(III) nitrate (Schlessinger, 1960) with selenous acid (H 2 SeO 3 ) gave the title compound, (I) (Salib et al, 1988). The X-ray diffraction analysis of (I) was undertaken in order to deduce the stereochemistry of this complex.…”

Section: Commentmentioning

confidence: 99%

“…It was found that the water molecules persist until 523 K and the SeO 3 is transformed into HSeO 3 (Emara et al, 1996). Similarly, the related compound [Co(NH 3 ) 5 SeO 3 ]Cl is very hygroscopic (Salib et al, 1988). In (I), the nitrate anion and water molecule form open pores in the structure when hydrogen bonded to two neighboring [Co(NH 3 ) 4 SeO 3 ] + cations.…”

Section: Figurementioning

confidence: 99%

Tetraammine(selenito-O,O′)cobaltate(III) nitrate monohydrate

2000

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The title compound crystallizes as the monohydrate, [Co(SeO3)(NH3)4]NO3·H2O. The crystallographic mirror symmetry coincides with the molecular symmetry; the mirror plane passes through the cation, anion and water molecule. The CoN4O2 octahedron is distorted, with the selenito group acting as a bidentate ligand through two bridging O atoms to the cobalt. The coordinated Se—O distance is 1.742 (2) Å, whereas the uncoordinated Se—O distance is 1.646 (3) Å. A three‐dimensional hydrogen‐bonded network exists between [Co(SeO3)(NH3)4]NO3 and the water molecule. The nitrate anion and water molecule form open pores in the structure when hydrogen bonded to two neighboring [Co(SeO3)(NH3)4]+ cations. Selenium participates in two types of relatively close intermolecular interactions with neighboring charged species (Se⋯N1 and Se⋯O3), but does not participate in an interaction with a neighboring O2 atom, the nearest contact distance being 4.638 (3) Å.

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“…'** The sulfite ion, SO:-3- 11 and selenite ion, SeOi-'*-I3 were previously used as ligands in transition metal complexes. In continuation of our studies on the main group VI anions, we have found that very limited information is available about the tellurite anion as a ligand in coordination chemistry.…”

Section: Introductionmentioning

confidence: 99%

Tellurito Complexes: Mixed Ligand Complexes of Cobalt(iii)

Emara

El-Hameed

Khalil

1996

Phosphorus, Sulfur, and Silicon and the Related Elements

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New tellurito complexes, [Co(enkTeQ]C1.2H20, [Co( 1 ,,Te03]C1.7H20. [Co(enX1.2-pn)Te03]C1. 5H20. and [Co(en),(NH3)(TeO,),,JBr2~ t K B r . l%HZO where; en = ethylcnediamhe. pn = propylenediamine were synthesized. Infrared spectra of the tellurito complexes indicate that the tellurite ligand is coordinated exclusively through two of its oxygen atoms, i.e., in a bidentate form. Visible spectra and magnetic moments of the complexes show that they are low-spin and hexacoordinated. The molar conductances, &, of these complexes in water show that the complexes are completely ionized.

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Normal sulphites of metals

Cited by 6 publications

References 11 publications

Schiff Bases of Acetone Derivatives: Spectroscopic Properties and Physical Constants

Schiff Bases of Acetone Derivatives: Spectroscopic Properties and Physical Constants

Tetraammine(selenito-O,O′)cobaltate(III) nitrate monohydrate

Tellurito Complexes: Mixed Ligand Complexes of Cobalt(iii)

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