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Determine the valence electrons count for the following complexes: H₂N 6×2 12 H₂N ...INH3) NH3 NH3 A 3+ 94- OC X CO Co. CO X 8+8=16 ? C

Determine the valence electrons count for the following complexes: H₂N 6×2 12 H₂N ...INH3) NH3 NH3 A 3+ 94- OC X CO Co. CO X 8+8=16 ? C

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Title:** Valence Electron Count in Coordination Complexes **Introduction:** Understanding the valence electron count of coordination complexes is essential for studying their chemical properties and behaviors. This guide will help you determine the valence electrons in given complexes. **Complex A:** - **Structure:** A central cobalt ion (\( \text{Co} \)) bonded with six ammonia (\( \text{NH}_3 \)) ligands. - **Charge:** The complex carries a \( 3+ \) charge. - **Bonding Information:** - Each \( \text{NH}_3 \) molecule donates two electrons to the \( \text{Co} \) ion. - With six \( \text{NH}_3 \) ligands, the total electron donation is \( 6 \times 2 = 12 \) electrons. - Cobalt in this context is \( \text{d}^6 \), contributing six electrons. - **Calculation:** - Total valence electrons = \( 12 (\text{from ligands}) + 6 (\text{from Co d-orbitals}) = 18 \). **Complex C:** - **Structure:** A central cobalt ion (\( \text{Co} \)) bonded with four carbon monoxide (\( \text{CO} \)) ligands. - **Bonding Information:** - Each \( \text{CO} \) molecule is a strong field ligand donating eight electrons in total from the four ligands (\( 4 \times 2 = 8 \)). - The \( \text{Co} \) starts with a \( \text{d}^8 \) electron configuration. - **Calculation:** - Total valence electrons = \( 8 (\text{from ligands}) + 8 (\text{from Co d-orbitals}) = 16 \). **Conclusion:** When analyzing coordination complexes, it's important to account for both the electrons contributed by the ligands and the central metal ion's valence electrons. This approach helps predict the geometry, stability, and reactivity of the complexes.
Transcribed Image Text:**Title:** Valence Electron Count in Coordination Complexes **Introduction:** Understanding the valence electron count of coordination complexes is essential for studying their chemical properties and behaviors. This guide will help you determine the valence electrons in given complexes. **Complex A:** - **Structure:** A central cobalt ion (\( \text{Co} \)) bonded with six ammonia (\( \text{NH}_3 \)) ligands. - **Charge:** The complex carries a \( 3+ \) charge. - **Bonding Information:** - Each \( \text{NH}_3 \) molecule donates two electrons to the \( \text{Co} \) ion. - With six \( \text{NH}_3 \) ligands, the total electron donation is \( 6 \times 2 = 12 \) electrons. - Cobalt in this context is \( \text{d}^6 \), contributing six electrons. - **Calculation:** - Total valence electrons = \( 12 (\text{from ligands}) + 6 (\text{from Co d-orbitals}) = 18 \). **Complex C:** - **Structure:** A central cobalt ion (\( \text{Co} \)) bonded with four carbon monoxide (\( \text{CO} \)) ligands. - **Bonding Information:** - Each \( \text{CO} \) molecule is a strong field ligand donating eight electrons in total from the four ligands (\( 4 \times 2 = 8 \)). - The \( \text{Co} \) starts with a \( \text{d}^8 \) electron configuration. - **Calculation:** - Total valence electrons = \( 8 (\text{from ligands}) + 8 (\text{from Co d-orbitals}) = 16 \). **Conclusion:** When analyzing coordination complexes, it's important to account for both the electrons contributed by the ligands and the central metal ion's valence electrons. This approach helps predict the geometry, stability, and reactivity of the complexes.
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