Electron spin resonance study of the structure of certain polynuclear copper(II) polyaminocarboxylate chelates and the dimeric copper chelates of N,N'-diglycylethylenediamine

Smith, Thomas D.; Martell, Arthur E.

doi:10.1021/ja00767a010

Cited by 20 publications

(13 citation statements)

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“…In solution, free rotation about the C(1)-C(I') bond would be possible and could give rise to the prediction of shorter intramolecular M-M distances than the 7.425 A found in the solid state (Smith & Martell, 1972).…”

Section: )mentioning

confidence: 97%

“…It has been found that EDTA can act as a pentadentate ligand, one-CHz-COOH arm being free (Stephens, 1969;Smith & Hoard, 1959), as a hexadentate ligand in six- (Weakliem & THE CRYSTAL AND MOLECULAR STRUCTURE OF [CreTTHA.2H20].6H20 Porai-Koshits, Novashilova, Polynova, Filippova & Martynenko, 1973) or seven- (Lind & Hoard, 1964;Hamor, Hamor & Hoard, 1964) coordinate complexes or as a bridging ligand (Fillippova, Polynova, Porai-Koshits, Novoshilova & Martynenko, 1973;Park, Glick & Hoard, 1969). The related ligand triethylenetetraminehexaacetic acid (H6TTHA) (a ligand with ten potential coordinating sites) has been extensively used as a coordinating ligand in e.s.r, studies, from which M-M contact distances are derived and possible structures for the complex proposed (Smith & Martell, 1972). The present crystallographic analysis was undertaken to determine the configuration of the TTHA ligand and the intra-and intermolecular metal-metal separation in one such complex.…”

Section: Introductionmentioning

confidence: 99%

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The crystal and molecular structure of diaquo-μ-triethylenetetramine-hexaacetatodichromium(III) hexahydrate, (Cr₂TTHA.2H₂O).6H₂O

Fallon¹,

Gatehouse²

1974

Acta Crystallogr Sect B

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Section: )mentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

The crystal and molecular structure of diaquo-μ-triethylenetetramine-hexaacetatodichromium(III) hexahydrate, (Cr₂TTHA.2H₂O).6H₂O

Fallon¹,

Gatehouse²

1974

Acta Crystallogr Sect B

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“…It has been shown by potentiometric and spectrophotometric methods (Bai & Martell, 1969;Smith & Martell, 1972;Muir & Rechani, 1974;Armani, Marchelli, Dossena, Casasti & Dallavalle, 1986) that in solution the Cu n ion reacts with deprotonated diaminodiamide, H_ ~L, to form the binuclear che' late [Cuz(H_ ~L)2] 2÷. Previously, we have studied the binuclear complex formed by Cu with a diaminodiamide ligand containing terminal propyl groups (Tahirov, Lu, Shu & Chung, 1994).…”

Section: Commentmentioning

confidence: 99%

“…Previously, we have studied the binuclear complex formed by Cu with a diaminodiamide ligand containing terminal propyl groups (Tahirov, Lu, Shu & Chung, 1994). In order to study the steric effects governing the differences between the two crystal structures, we prepared the title binuclear complex (I), the structure of which has been predicted by Smith & Martell (1972).…”

Section: Commentmentioning

confidence: 99%

“…Potentiometric and spectrophotometric methods (Bai & Martell, 1969;Smith & Martell, 1972;Muir & Rechani, 1974;Armani, Marchelli, Dossena, Casasti & Dallavalle, 1986) have shown that in aqueous solution the Cu II ion reacts with deprotonated diaminodiamide, H_2L, to form the monomer chelate [Cu(H_2L)]. Fawcett et al (1980) have reported the crystal structure of [Cu(2,3,2-tet)(C104)2] (2,3,2-tet = 1,4,8,11-tetraazaundecane).…”

Section: Commentmentioning

confidence: 99%

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A binuclear copper(II) complex of the deprotonated anion of N,N'-diglycylethylenediamine

Tahirov¹,

Lu²,

Shu³

et al. 1994

Acta Crystallogr C

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Coordination Chemistry in the Solid: Study of the Incorporation of CuII into Cyclam-Containing Hybrid Materials

et al. 2001

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Nanostructured organic ± inorganic hybrid materials have known a considerable expansion in the past decade, [1±5] because they may provide unique combinations of properties which cannot be obtained by other ways. Among the possibilities offered by this class of solids, the preparation of materials able to strongly chelate metal cations which could remain chemically accessible seemed to us to be of great interest. Indeed, such materials could be interesting to study the coordination chemistry within the solid state as well as for their potential applications in catalysis, [6] separations, [7] optical devices, [8] or magnetic properties for example. Such applications require the incorporation within the materials of a good chelating ligand. Saturated polyazamacrocycles and especially 1,4,8,11-tetraazacyclotetradecane [9±11] (cyclam) having attracted much attention because of their remarkable binding ability towards transition and heavy metal cations, we set out to prepare hybrid materials incorporating cyclam moieties by using the sol ± gel process.We have shown that nanostructured materials are kinetically controlled. [3, 4, 12] The texture of the solids is highly dependent on all the parameters able to modify the kinetics of polycondensation (catalyst, [13] concentration of the reagent, [13] solvent, [13] temperature, [13a] and the organic spacer [13] ). Furthermore, the importance of the organic moiety in the arrangement of solids obtained by the sol ± gel process was displayed, giving rise to a possible short-range organization. [3, 4, 14, 15] In this context, it seemed interesting to investigate the incorporation of metal salts into cyclam-containing hybrid materials by two routes: the hydrolysis and polycondensation of metal salt/silylated cyclam derivatives complexes (Scheme 1, route A) or by hydrolysis and polycondensation of silylated cyclam derivatives followed by the direct incorporation of metal salts into the xerogels (Scheme 1, route B).We have shown that the hydrolysis and polycondensation of silylated cyclam Cu II and Co II complexes (route A, Scheme 1) gives rise quantitatively to hybrid materials incorporating the Cu II and Co II salts, [16] thus the complexation of metal cations survives the sol ± gel process. Herein we describe the direct incorporation of CuCl 2 into hybrid materials (route B). By using X-ray fluorescence and ESR spectroscopy, we show that the two routes of incorporation of the salts are not equivalent Crystal data for 2 (C 171 H 206 Cl 10 Mn 10 N 20 O 57 ): M r 4357.46, dark brown crystal (0.35 Â 0.40 Â 0.55 mm), triclinic, space group P1 Å , a 14.5331(2), b 18.1704(1), c 21.3923(2) , a 76.545(1), b 74.220(1), g 86.025(1), V 5287.03(9) 3 , Z 1, T 293(2) K, 1 calcd 1.369 g cm À3 , F(000) 2248, m 0.782 mm À1 . Of the 28 654 reflections ((2q) max 50.148), 18 480 unique reflections were collected. From these, 9215 reflections with I b 2s(I) were used to solve the structure and were refined on F 2 by full-matrix least-squares techniques (SHELXL-97). At convergence, R 1...

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Electron spin resonance study of the structure of certain polynuclear copper(II) polyaminocarboxylate chelates and the dimeric copper chelates of N,N'-diglycylethylenediamine

Cited by 20 publications

References 6 publications

The crystal and molecular structure of diaquo-μ-triethylenetetramine-hexaacetatodichromium(III) hexahydrate, (Cr₂TTHA.2H₂O).6H₂O

The crystal and molecular structure of diaquo-μ-triethylenetetramine-hexaacetatodichromium(III) hexahydrate, (Cr₂TTHA.2H₂O).6H₂O

A binuclear copper(II) complex of the deprotonated anion of N,N'-diglycylethylenediamine

Coordination Chemistry in the Solid: Study of the Incorporation of CuII into Cyclam-Containing Hybrid Materials

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Electron spin resonance study of the structure of certain polynuclear copper(II) polyaminocarboxylate chelates and the dimeric copper chelates of N,N'-diglycylethylenediamine

Cited by 20 publications

References 6 publications

The crystal and molecular structure of diaquo-μ-triethylenetetramine-hexaacetatodichromium(III) hexahydrate, (Cr2TTHA.2H2O).6H2O

The crystal and molecular structure of diaquo-μ-triethylenetetramine-hexaacetatodichromium(III) hexahydrate, (Cr2TTHA.2H2O).6H2O

A binuclear copper(II) complex of the deprotonated anion of N,N'-diglycylethylenediamine

Coordination Chemistry in the Solid: Study of the Incorporation of CuII into Cyclam-Containing Hybrid Materials

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The crystal and molecular structure of diaquo-μ-triethylenetetramine-hexaacetatodichromium(III) hexahydrate, (Cr₂TTHA.2H₂O).6H₂O

The crystal and molecular structure of diaquo-μ-triethylenetetramine-hexaacetatodichromium(III) hexahydrate, (Cr₂TTHA.2H₂O).6H₂O