Synthesis, structure and solution chemistry of dioxidovanadium(V) complexes with a family of hydrazone ligands. Evidence of formation of centrosymmetric dimers via H-bonds in the solid state

AbstractThe formation of FeII,III hydoxy salts (green rusts) from FeII sulphate and chloride solutions and their transformation to lepidocrocite, γ-FeOOH, was studied at ambient temperature, constant pH of ∼7.0 and under controlled air flow. The formation of green rust and its subsequent transformation to lepidocrocite could be distinguished by the reaction rate and solution chemistry. The SO42− and Cl− concentrations in solution attain a minimum at the break between the two reaction steps and are completely restored to their initial values after complete transformation to lepidocrocite. While the green rust is being formed, its FeII/FeIII ratio shows a minor decrease and its FeIII/anion ratio a minor increase. These ratios, however, deviate from the ideal pyroaurite-type structure (M2+/M3+ = 3; M3+/A− = 1; M: metal; A−: anion) and possibilities to accommodate this deviation are discussed. A period during which no protons were produced (i.e. no base consumed) was found to separate the two reactions in the chloride, but not in the sulphate system. During this period a partial solid state oxidation of the green rust took place, leading to its destabilization and eventual decomposition.

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Efficient Preparation of Monoadducts of [60]Fullerene and Anthracenes by Solution Chemistry and Their Thermolytic Decomposition in the Solid State

Chemistry - A European Journal ◽

10.1002/1521-3765(20010803)7:15<3223::aid-chem3223>3.0.co;2-b ◽

2001 ◽

Vol 7 (15) ◽

pp. 3223-3235 ◽

Cited By ~ 33

Author(s):

Bernhard Kräutler ◽

Thomas Müller ◽

Alvaro Duarte-Ruiz

Keyword(s):

Solid State ◽

Solution Chemistry

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Synthesis, structure and solution chemistry of quaternary oxovanadium(V) complexes incorporating hydrazone ligands

Inorganica Chimica Acta ◽

10.1016/j.ica.2009.02.043 ◽

2009 ◽

Vol 362 (9) ◽

pp. 3303-3308 ◽

Cited By ~ 29

Author(s):

Bipul Mondal ◽

Michael G.B. Drew ◽

Tapas Ghosh

Keyword(s):

Solution Chemistry ◽

Hydrazone Ligands

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Hydrogen Bonding of two l-(φ-Ammonioalkyl)-2-acyl-cyclopentadienides in the Solid State

Zeitschrift für Naturforschung B ◽

10.1515/znb-2000-0616 ◽

2000 ◽

Vol 55 (6) ◽

pp. 541-545 ◽

Cited By ~ 1

Author(s):

Andreas Müller ◽

Gerhard Maas

Keyword(s):

Hydrogen Bonding ◽

Solid State ◽

Hydrogen Bonds ◽

Two Dimensional ◽

Intermolecular Hydrogen Bonds ◽

Dimensional Network ◽

Solid State Structures ◽

Centrosymmetric Dimers

The solid-state structures of a l-(φ-ammoniopropyl)-2-(2-thienylcarbonyl)-cyclopentadienide (2) and a l-(φ-ammoniopentyl)-2-(4-methoxybenzoyl)-cyclopentadienide (3) have been determined. Both betaines self-assemble by NH ··· O hydrogen bonds, but the motifs are different. In the ammoniopropyl case, both intramolecular and intermolecular hydrogen bonds of this type exist, the latter bond being responsible for the formation of infinite chains. In the ammoniopentyl case, intermolecular hydrogen bonds build up a two-dimensional network which contains centrosymmetric dimers held together by NH ··· O=C-aryl hydrogen bonds.

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