Related Experiment Video
Updated: Jun 24, 2025
17:14
Compact Quantum Dots for Single-molecule Imaging
Published on: October 9, 2012
18.1K
Octa-kis(di-butyl-ammonium) deca-molybdate(VI).
Papa Aly Gueye1, Lamine Yaffa1, Dame Seye2
1Laboratoire de Chimie Minérale et Analytique (LACHIMIA), Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, Senegal.
Iucrdata
|June 7, 2024
Summary
This study details the crystal structure of a novel octamolybdate polyanion, [Mo10O34]8-. The structure reveals specific packing arrangements and hydrogen bonding interactions with di-butyl-ammonium cations.
Area of Science:
- Inorganic Chemistry
- Crystallography
- Materials Science
Background:
- Polymolybdates are complex inorganic anions with diverse structures.
- Understanding their structural motifs is crucial for developing new materials.
Purpose of the Study:
- To elucidate the crystal structure of the octamolybdate salt (C8H20N)8[Mo10O34].
- To characterize the structural features of the [Mo10O34]8- polyanion and its interactions with counter-cations.
Main Methods:
- Single-crystal X-ray diffraction analysis.
- Structural characterization of the polyanion and cation packing.
Main Results:
- The [Mo10O34]8- polyanion adopts a beta-type octamolybdate structure.
- Polyanions are arranged in rows parallel to the [001] crystallographic direction.
- Di-butyl-ammonium cations form N-H...O hydrogen bonds with the polyanions.
Conclusions:
- The study provides a detailed structural description of a novel octamolybdate.
- The observed hydrogen bonding network influences the overall crystal packing.
Related Concept Videos
01:22EDTA: Chemistry and Properties
1.9K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
1.9K
03:46Qualitative Analysis
22.2K
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
For instance, group IV...
22.2K
00:43Complexometric Titration: Ligands
945
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
945
03:45Formation of Complex Ions
23.6K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.6K
01:26EDTA: Auxiliary Complexing Reagents
578
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
578
03:34Ionic Compounds: Formulas and Nomenclature
66.8K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
66.8K