Valence bond and crystal field theory
Why this is asked: Tetrahedral crystal-field splitting is always smaller than octahedral for the same metal and ligands (roughly 4/9 the size) — small enough that tetrahedral complexes are almost always high-spin regardless of the ligand, unlike octahedral complexes where a strong-field ligand like CN⁻ or CO forces low-spin pairing. VBT explains a complex's geometry and magnetic moment through hybridisation, but not why it's coloured or why one ligand counts as "strong field" — that gap is exactly what crystal field theory fills.
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The correct order of the wavelength of light absorbed by the following complexes is:
A. · B. · C. · D.
Choose the correct answer from the options given below:
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Which of the following are paramagnetic?
A. · B. · C. · D. · E.
Choose the correct answer from the options given below:
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Given below are two statements:
Statement I: Both and complexes are octahedral but differ in their magnetic behaviour.
Statement II: is diamagnetic whereas is paramagnetic.
In the light of the above statements, choose the correct answer from the options given below:
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