Which of the following geometries of complexes is indicated by Coordination number (CN) = 5? ans. octahedral Trigonal planar Tetrahedral square pyramidal

Break Down the Problem

1. Determine the possible geometries for coordination number (CN) = 5.
2. Evaluate each option to identify which geometry is correct based on known coordination geometries.

Relevant Concepts

1. Coordination Number (CN) indicates the number of donor atoms that are bonded to the central metal atom in a coordination complex.
2. Common geometries associated with different CN values:
   • CN = 2: Linear
   • CN = 4: Tetrahedral or Square Planar
   • CN = 6: Octahedral
   • CN = 5: Square Pyramidal or Trigonal Bipyramidal

Analysis and Detail

1. Octahedral: Corresponds to CN = 6, so this option is incorrect.
2. Trigonal Planar: Corresponds to CN = 3, so this option is incorrect.
3. Tetrahedral: Corresponds to CN = 4, so this option is incorrect.
4. Square Pyramidal: This can be a geometry for CN = 5.

Verify and Summarize

• The possible geometries for CN = 5 include Square Pyramidal and Trigonal Bipyramidal.
• Among the given options, the Square Pyramidal geometry represents one of the structures corresponding to CN = 5.

Final Answer

The geometry indicated by Coordination number (CN) = 5 is Square Pyramidal.