Related Experiment Video
Updated: Jun 28, 2026
07:57
Effect of Microwave Synthesis Conditions on the Structure of Nickel Hydroxide Nanosheets
Published on: August 18, 2023
Zinc and nickel ferrocyanides: preparation, composition and structure
C Loos-Neskovic1, M Fedoroff, E Garnier
1Laboratoire d'Analyse par Activation Pierre Sue, C.E.N./SACLAY, 91191 Gif-sur-Yvette, France.
Talanta
|December 1, 1984
Summary
This review covers nickel and zinc ferrocyanides from 1922-1983, focusing on how preparation methods influence their composition and structure. Understanding these relationships is key for material science applications.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Solid-State Chemistry
Background:
- Nickel ferrocyanides and zinc ferrocyanides are coordination compounds with diverse applications.
- Their properties are highly dependent on synthesis conditions.
- A historical overview of their study is warranted.
Purpose of the Study:
- To review and synthesize research on nickel and zinc ferrocyanides published between 1922 and 1983.
- To correlate the compositions and structures of these compounds with their preparation methods.
- To provide a foundational understanding for future research in ferrocyanide chemistry.
Main Methods:
- Literature review of scientific publications from 1922-1983.
- Analysis of reported compositions and structural data.
- Comparison of different synthetic routes and their outcomes.
Main Results:
- Established a link between preparation techniques (e.g., precipitation, hydrothermal synthesis) and the resulting stoichiometry and crystal structures.
- Identified common phases and structural motifs for both nickel and zinc ferrocyanides.
- Highlighted variations in composition based on reaction pH, temperature, and precursor concentrations.
Conclusions:
- Preparation methods are critical determinants of nickel and zinc ferrocyanide characteristics.
- A comprehensive understanding of synthesis-structure-composition relationships is essential for targeted material design.
- This review consolidates historical knowledge, paving the way for advanced ferrocyanide material development.
More Related Videos
Related Concept Videos
03:45Formation of Complex Ions
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...
03:02Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
02:42Ionic Crystal Structures
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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,...
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.