Chelate polymers of copper(II) with various dihydroxyquinoid ligands

Coble, H. Dwain; Holtzclaw, Henry F.

doi:10.1016/0022-1902(74)80211-3

Cited by 64 publications

(34 citation statements)

References 6 publications

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“…Very specific to the reactive groups (quinone carbonyls and hydroxyls) of anthracyclines is the formation of chelate complexes with di-or trivalent ions [2,6,[19][20][21][22]. The structure of these complexes can be explained by a concept of the metal chelate, giving rise to an intramolecular charge transfer to the anthraquinone nucleus [2,20].…”

Section: Resultsmentioning

confidence: 99%

“…This structure allows to include variable amounts of DAU molecules and copper ions. A number of properties has been used to characterize the structure of polymeric chelate complex: (1) principal ability of DAU molecules to form polymeric chelate complexes with divalent copper [6,19,21,22]; (2) possibility of including in the structure of the complex up to 10 anthracycline molecules [19]; (3) flat spatial structure of (anthracycline-Cu) complexes [6,19].…”

Section: Resultsmentioning

confidence: 99%

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Formation of polymeric chelate bridges between double‐stranded DNA molecules fixed in spatial structure of liquid‐crystalline dispersions

et al. 1996

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The formation of cholesteric liquid-crystalline dispersions from DNA-dannomycin complexes in water-salt polyethyleneglycol-contaiuing solutions was investigated. In the case of nonclassical complex formation between DNA and daunomyein (DAU), reactive groups of DAU were used for the formation of polymeric chelate complex with divalent copper ions (-DAUCu-...-Cu-DAU-), located between neighboring double-stranded DNA molecules, fixed in spatial structure of liquid-crystalline dispersions. The formation of polymeric chelate complex does not depend upon the sense of helicoidal twist of DNA cholesteries. A many-fold increase in the CD hand in the DAU absorption region is specific to this process. A reduction of the divalent copper ions as a result of a redox-proeess is accompanied by destroying of structure of polymeric chelate complex between DNA molecules and by disappearance of the abnormal CD band in dannomyein absorption region.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Formation of polymeric chelate bridges between double‐stranded DNA molecules fixed in spatial structure of liquid‐crystalline dispersions

et al. 1996

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“….0018(14) -.0016(17) 0 (2 ) .6489 (2) .9484 (7) .1449 (2) . .0964 (1) .0275 (7) .0495 (9) .0241 (7) .0020 (7) .0069 (5) .0008 (7) 0 (1 ) .9095 (2) .9882 (6) .2289 (2) .…”

Section: (17) 0383(26) 0305(19) 0028(18)mentioning

confidence: 99%

“….0964 (1) .0275 (7) .0495 (9) .0241 (7) .0020 (7) .0069 (5) .0008 (7) 0 (1 ) .9095 (2) .9882 (6) .2289 (2) .…”

Section: (17) 0383(26) 0305(19) 0028(18)mentioning

confidence: 99%

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Komplexe mit substituierten 2,5-Dihydroxy-p-benzochinonen: Das isotype Paar BaC₆X₂O₄ · 3 H₂O (X = Cl, Br) / Complexes with Substituted 2,5-Dihydroxy-p-benzochinones: The Isotypic Pair BaC₆X₂O₄ · 3 H₂O (X = Cl, Br)

Robl

Weiss

1986

Zeitschrift Für Naturforschung B

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AbstractBaC6X2O4 · 3H2O (X = Cl, Br) crystallizes in the orthorhombic space group Cmca. 4 of the 8 oxygen atoms around Ba2+ belong to two different dianions, chelating Ba2+. In this way 1-dimensional corrugated chains are formed, interlinked by two oxygen atoms of neighbouring chains, thus forming layers. This interconnection is of polar character within a layer. The interlinking oxygen atoms have one carbon- and two Ba2+ neighbours. CN 8 is completed by two water molecules. The latter and a further water molecule situated between the layers may be removed reversibly in a topochemical reaction without destruction of the structure.

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Ein zweidimensionales, tetragonales Kupfer(II)‐Schichtgitter: Struktur und magnetische Eigenschaften von [Cu(C₆O₄Cl₂)(C₄H₄N₂)]_n

Kawata¹,

Kitagawa²,

Kondo³

et al. 1994

Angewandte Chemie

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Über Chloranilsäure‐Dianionen verbrückte CuII‐Ketten, die mit Pyrazinliganden als “Quervernetzern” zweidimensionale Schichtstrukturen bilden, liegen in der Titelverbindung vor (Ausschnitt aus der Struktur siehe unten). Diese Anordnung führt zu schwach antiferromagnetischen Wechselwirkungen zwischen den Metallzentren und zu einem Singulett‐Grundzustand. Mit Methanol als HBrücken‐Donor läßt sich ein analoges Koordinationspolymer aufbauen.

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Chelate polymers of copper(II) with various dihydroxyquinoid ligands

Cited by 64 publications

References 6 publications

Formation of polymeric chelate bridges between double‐stranded DNA molecules fixed in spatial structure of liquid‐crystalline dispersions

Formation of polymeric chelate bridges between double‐stranded DNA molecules fixed in spatial structure of liquid‐crystalline dispersions

Komplexe mit substituierten 2,5-Dihydroxy-p-benzochinonen: Das isotype Paar BaC₆X₂O₄ · 3 H₂O (X = Cl, Br) / Complexes with Substituted 2,5-Dihydroxy-p-benzochinones: The Isotypic Pair BaC₆X₂O₄ · 3 H₂O (X = Cl, Br)

Ein zweidimensionales, tetragonales Kupfer(II)‐Schichtgitter: Struktur und magnetische Eigenschaften von [Cu(C₆O₄Cl₂)(C₄H₄N₂)]_n

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Chelate polymers of copper(II) with various dihydroxyquinoid ligands

Cited by 64 publications

References 6 publications

Formation of polymeric chelate bridges between double‐stranded DNA molecules fixed in spatial structure of liquid‐crystalline dispersions

Formation of polymeric chelate bridges between double‐stranded DNA molecules fixed in spatial structure of liquid‐crystalline dispersions

Komplexe mit substituierten 2,5-Dihydroxy-p-benzochinonen: Das isotype Paar BaC6X2O4 · 3 H2O (X = Cl, Br) / Complexes with Substituted 2,5-Dihydroxy-p-benzochinones: The Isotypic Pair BaC6X2O4 · 3 H2O (X = Cl, Br)

Ein zweidimensionales, tetragonales Kupfer(II)‐Schichtgitter: Struktur und magnetische Eigenschaften von [Cu(C6O4Cl2)(C4H4N2)]n

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Komplexe mit substituierten 2,5-Dihydroxy-p-benzochinonen: Das isotype Paar BaC₆X₂O₄ · 3 H₂O (X = Cl, Br) / Complexes with Substituted 2,5-Dihydroxy-p-benzochinones: The Isotypic Pair BaC₆X₂O₄ · 3 H₂O (X = Cl, Br)

Ein zweidimensionales, tetragonales Kupfer(II)‐Schichtgitter: Struktur und magnetische Eigenschaften von [Cu(C₆O₄Cl₂)(C₄H₄N₂)]_n