Nomenclature and Properties of Tetraamminecopper(II) Ion: A Comprehensive Guide

The complex ion [CuNH34]2 is named tetraamminecopper(II) ion. This name follows the International Union of Pure and Applied Chemistry (IUPAC) nomenclature rules for coordination compounds. Let’s delve more into the details of this complex ion.

Introduction to Tetraamminecopper(II) Ion

Correct Formula and Naming

The complex ion is correctly represented as [CuNH34]2 . According to IUPAC, the name of this complex ion is tetraamminecopper(II) ion. In this name, 'tetra' indicates the number of NH3 ligands, and 'ammine' is the descriptive term for NH3 ligands. The oxidation state (II) is indicated using a Roman numeral in parentheses.

Understanding the Coordinate Covalent Bond

Coordinate Covalent Bond in [CuNH34]2

The coordinate covalent bond in [CuNH34]2 extends from the lone pair of the nitrogen atom to the Cu(II) center. This is a conventional two-centre two-electron bond involving the donation of a lone pair of electrons from the nitrogen atom to the metal ion.

IUPAC Nomenclature Rules for Coordination Compounds

IUPAC Nomenclature Rules

The cation is named first in both positively and negatively charged coordination entities. Ligands are named in alphabetical order before the name of the central atom/ion. This procedure is reversed from writing the formula. Names of anionic ligands end in -o, while neutral and cationic ligands are the same except: H2O is called aqua NH3 is called ammine CO is called carbonyl NO is called nitrosyl Prefixes (mono, di, tri, etc.) are used to indicate the number of individual ligands in the coordination entity. When the names of ligands include a numerical prefix, then the terms bis, tris, tetrakis, etc., are used. These ligands are placed in parentheses. For instance, [NiCl2PPh32] is named as dichloridobistriphenylphosphinenickel(II). The oxidation state of the metal in cation, anion, or neutral coordination entity is indicated by a Roman numeral in parentheses. For cations, the name of the metal remains the same as the element. For anions, the name of the metal ends with the suffix -ate, for example, cobalt(II) is called cobaltate and iron(II) is called ferrate.

Application in Tetraamminecopper(II) Ion

Applying IUPAC Rules to [CuNH34]2

Since [CuNH34]2 is a cation, the name of the metal remains the same as the element (copper), and it is connected to the neutral entity (NH3 or ammine). Since the oxidation state of copper is indicated as (II), the final name is tetraamminecopper(II) ion. The formula can be derived from the ionic charges as follows:

Cu ( 2) 4(NH3) (0) Cu2 NH34

Further Exploration of Coordination Chemistry

Further Exploration

Understanding the nomenclature and properties of complex ions like [CuNH34]2 is fundamental in coordination chemistry. Such knowledge is crucial for students and professionals in chemistry, biochemistry, and materials science. For a more in-depth study of coordination compounds and their applications, consider exploring textbooks and research articles on the subject.

Conclusion

In summary, the complex ion [CuNH34]2 is named tetraamminecopper(II) ion. The IUPAC nomenclature rules provide a consistent and systematic approach to naming these complex ions, which is essential for the proper discussion and understanding of coordination chemistry.

Correct Formula and Naming

The complex ion [CuNH34]2 is called tetraamminecopper(II) ion.

Coordinate Covalent Bond in [CuNH34]2

The coordinate covalent bond in [CuNH34]2 is formed when the nitrogen atom of NH3 donates its lone pair of electrons to the Cu(II) center.

IUPAC Nomenclature Rules

R1: The cation is named first. R2: Ligands are named in alphabetical order. R3: Anionic ligands end in -o, neutral/pos charges are the same except 'aqua', 'ammine', 'carbonyl', and 'nitrosyl'. R4: PREFIXES are used for the number of ligands. R5: The oxidation state of metal is indicated in parentheses. R6: Cations use the element name, anions use -ate suffix.

Applying IUPAC Rules to [CuNH34]2

Since the metal is copper and the oxidation state is (II), the final name is tetraamminecopper(II) ion.

Further Exploration

Explore more complex ions and their properties in coordination chemistry.