Related Experiment Video
Updated: Jun 5, 2026
08:46
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
Poly[octa-aquadi-μ-phosphato-trinickel(II)].
Acta Crystallographica. Section E, Structure Reports Online
|January 5, 2011
Summary
Researchers synthesized a novel nickel phosphate compound, [Ni(3)(PO(4))(2)(H(2)O)(8)](n), using hydrothermal methods. This study reveals its unique 1D chain structure linked by hydrogen bonds into a 3D network.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Crystallography
Background:
- Nickel phosphates are compounds with diverse structures and properties.
- Understanding the coordination and bonding in metal phosphates is crucial for materials design.
Purpose of the Study:
- To synthesize and characterize a novel nickel phosphate compound.
- To elucidate the crystal structure and network dimensionality of [Ni(3)(PO(4))(2)(H(2)O)(8)](n).
Main Methods:
- Hydrothermal synthesis was employed for compound preparation.
- X-ray diffraction or similar crystallographic techniques were used for structural determination.
Main Results:
- The synthesized compound, [Ni(3)(PO(4))(2)(H(2)O)(8)](n), features nickel atoms in distorted octahedral coordination.
- A unique structure with shared four- and eight-membered rings was observed.
- Phosphate anions bridge nickel atoms to form a one-dimensional chain.
Conclusions:
- The one-dimensional chains are interconnected via hydrogen bonds, forming an extended three-dimensional network.
- The study provides insights into the structural assembly of nickel phosphate materials.
Related Concept Videos
02:54Coordination Compounds and Nomenclature
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
02:57Coordination Number and Geometry
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
01:22EDTA: Chemistry and Properties
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...
02:42Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
00:43Complexometric Titration: Ligands
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...