Question: In which of the following coordination compounds does hydrogen act as a ligand?
Options:
[Fe(H2O)6]2+
[Cu(NH3)4]2+
[CoCl4]2-
[Ag(CN)2]-
Correct Answer: [Fe(H2O)6]2+
Solution:
In the complex [Fe(H2O)6]2+, water (H2O) acts as a ligand, coordinating with the iron ion.
In which of the following coordination compounds does hydrogen act as a ligand?
Practice Questions
Q1
In which of the following coordination compounds does hydrogen act as a ligand?
[Fe(H2O)6]2+
[Cu(NH3)4]2+
[CoCl4]2-
[Ag(CN)2]-
Questions & Step-by-Step Solutions
In which of the following coordination compounds does hydrogen act as a ligand?
Step 1: Understand what a ligand is. A ligand is a molecule or ion that can donate a pair of electrons to a metal ion to form a coordination complex.
Step 2: Identify the coordination compounds given in the question. Look for compounds that contain hydrogen.
Step 3: Check if hydrogen is part of a larger molecule that can act as a ligand. For example, in water (H2O), the oxygen atom can donate electrons, and hydrogen is part of this molecule.
Step 4: Determine if hydrogen itself is acting as a ligand. In most cases, hydrogen does not act as a ligand by itself; instead, it is part of larger molecules like H2O.
Step 5: Conclude that in the complex [Fe(H2O)6]2+, water (H2O) is the ligand, and hydrogen is part of that molecule but not acting as a ligand on its own.
Coordination Compounds – Coordination compounds consist of a central metal atom or ion bonded to surrounding ligands, which can be neutral molecules or anions.
Ligands – Ligands are ions or molecules that can donate a pair of electrons to a central metal atom to form a coordinate bond.
Hydrogen as a Ligand – In some cases, hydrogen can act as a ligand, particularly in the form of hydride (H-) or in coordination with other elements.
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