Hexaamminecopper(II) ion

Definition

The hexaamminecopper(II) ion, with the chemical formula $[Cu(NH_3)_6]^{2+}$, is a coordination complex formed by the central copper(II) ion surrounded by six ammonia ligands. This complex is an important example in the study of coordination chemistry of transition metals.

5 Must Know Facts For Your Next Test

1. The hexaamminecopper(II) ion has a coordination number of 6, with the copper(II) ion surrounded by six ammonia (NH$_3$) ligands.
2. The copper(II) ion in the hexaamminecopper(II) ion has a d$^9$ electronic configuration, which results in a square planar or octahedral geometry.
3. The $[Cu(NH_3)_6]^{2+}$ complex is an example of a coordination complex with a positively charged central metal ion and neutral ligands.
4. The ammonia ligands in the hexaamminecopper(II) ion are sigma ($ackslash sigma$) donors, meaning they donate their lone pair of electrons to the central copper(II) ion.
5. The hexaamminecopper(II) ion is an important model system for understanding the properties and behavior of coordination complexes in general.

Review Questions

• Explain the structure and bonding in the hexaamminecopper(II) ion.
  • The hexaamminecopper(II) ion, $[Cu(NH_3)_6]^{2+}$, is a coordination complex in which the central copper(II) ion (Cu$^{2+}$) is surrounded by six ammonia (NH$_3$) ligands. The copper(II) ion has a d$^9$ electronic configuration, which results in a square planar or octahedral geometry for the complex. The ammonia ligands are sigma ($ackslash sigma$) donors, meaning they donate their lone pair of electrons to the central copper(II) ion, forming coordinate covalent bonds. This bonding arrangement creates a stable, positively charged coordination complex.
• Describe the role of the hexaamminecopper(II) ion in the study of coordination chemistry of transition metals.
  • The hexaamminecopper(II) ion, $[Cu(NH_3)_6]^{2+}$, is an important model system for understanding the properties and behavior of coordination complexes in general. As a coordination complex with a central transition metal ion (copper(II)) and neutral ligands (ammonia), it provides insights into the factors that influence the stability, geometry, and reactivity of such complexes. The study of the hexaamminecopper(II) ion helps elucidate the principles of coordination chemistry, such as ligand field theory, crystal field theory, and the factors that determine the stability and reactivity of coordination complexes.
• Analyze the importance of the hexaamminecopper(II) ion in the broader context of coordination chemistry and its applications.
  • The hexaamminecopper(II) ion, $[Cu(NH_3)_6]^{2+}$, is a pivotal example in the study of coordination chemistry of transition metals. As a well-characterized coordination complex, it serves as a model system for understanding the fundamental principles of bonding, structure, and reactivity in coordination complexes. The knowledge gained from the study of the hexaamminecopper(II) ion has broader implications, as coordination complexes play crucial roles in various fields, including catalysis, biological systems, materials science, and environmental chemistry. The insights derived from the study of this complex contribute to the development of new coordination compounds with tailored properties and applications, making it an essential component in the comprehensive understanding of coordination chemistry.

Related terms

Coordination Complex: A coordination complex is a central metal ion surrounded by a specific number of ligands, which are atoms or molecules that are attached to the central metal ion.

Ligand:

A ligand is an atom, ion, or molecule that is attached to the central metal ion in a coordination complex.

Coordination Number:

The coordination number is the number of ligands that are attached to the central metal ion in a coordination complex.