Komplexverbindungen mehrwertiger Alkohole. (Eine Klasse cyclischer Metallkomplexsalze.)

Grün, Ad.; Bockisch, F.

doi:10.1002/cber.19080410325

Cited by 28 publications

(3 citation statements)

References 15 publications

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“…First syntheses of 3d‐metal complexes with neutral (i.e. uncharged) EG ligands were described more than a century ago by Grün , . In the 1970s, Antti published the crystal structures of some complexes obtained from 3d‐metal chlorides or sulfates and EG.…”

Section: Introductionmentioning

confidence: 99%

Influence of Common Anions on the Coordination of Metal Cations in Polyalcohols

Teichert

Ruck

2019

Eur J Inorg Chem

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Polyalcohols (polyols), such as ethylene glycol, have mild reducing ability. They are used in the so‐called polyol process to produce metallic nanoparticles of various kinds. In these syntheses, the effective reduction potential of the polyol strongly depends on the presence of other anions. Those anions compete against the polyol molecules for the direct bonding to the metal cations. As an indicator for the coordination behavior of polyols, we crystallized and structurally characterized 19 new coordination compounds with Mn, Co, Ni, Cu, Zn, Cd, Pb, or Bi. 15 of these compounds comprise nitrate ions, the others acetate ions. Compared to the already known chloride and sulfate analogues, nitrate shows an intermediate coordination affinity towards the metal cations considered here. While no direct metal–nitrate coordination occurs with Co2+, Ni2+, and Zn2+, mixed nitrate–polyol coordination environments are found for Mn2+, Cu2+, Cd2+, and Bi3+. Because of its strong chelating property, the acetate ion always coordinates the metal cation, competing with the polyol. The first mononuclear and dinuclear metal acetate diol coordination compounds were obtained with Co2+ and Cu2+, respectively. The coordination affinity of nitrate and acetate ligands in solid metal polyol complexes fully corresponds with our recent observations of the anion‐dependent reduction behavior of copper(II) salts in polyols.

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Section: Introductionmentioning

confidence: 99%

Influence of Common Anions on the Coordination of Metal Cations in Polyalcohols

Teichert

Ruck

2019

Eur J Inorg Chem

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“…Somewhat similar to the ferrous dipyridyl compound is the ferrous complex with a-pyridylhydrazine NH2-NH2) Fe Cl2 described by Emmert and Schneider (62). d. Two -OH groups (both coordinating) A great number of compounds were prepared by Grim and his coworkers (91,92) in which ethylene glycol and several other 1,2-glycols, propyleneglycol, pinacol, etc., were coordinated to metals. Three molecules of the glycol but never more entered the compounds, corresponding to ring formation of the type: Glycerol acts in a similar manner (93), but as three molecules always enter into the complex probably only two hydroxyl groups are coordinated, the third being left free, that is, glycerol functions as a bidentate rather than a tridentate molecule.…”

Section: C2hb-c-c-chsmentioning

confidence: 97%

The Chelate Rings.

Diehl¹

1937

Chem. Rev.

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“…This is what one would expect if there were dehydration. Grtin and Bockisch (32) say that copper sulfate pentahydrate with dry glycerol gives a dark blue solution. On precipitation with alcohol they obtained a blue oil which could be dried to a blue glass.…”

Section: Green and Blue Saltsmentioning

confidence: 99%