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Formula Sheets / Chemistry

Chapter 24

Coordination Compounds

Revise with flashcards Download this chapter (PDF) All Chemistry formulas (PDF)

Werner's theory and nomenclature Isomerism VBT and crystal field theory Stability

Werner's theory and nomenclature

primary valency $=$ oxidation state $;$ secondary valency $=$ coordination number
EAN
EAN $2;$ oxidation state $+ 2 \times$ CN

Isomerism

Geometrical isomers
$[$ MA $_{2}$ B $_{2}]$ sq. planar: $2;$ $[$ MA $_{4}$ B $_{2}]$ oct: $2;$ $[$ MA $_{3}$ B $_{3}]$ oct: $2 (f a c, m er)$
structural: ionisation, linkage (NO $_{2}^{-} /$ ONO $^{-}),$ coordination, hydrate

VBT and crystal field theory

Octahedral splitting
CFSE $= (- 0.4 n_{t_{2 g}} + 0.6 n_{e_{g}}) Δ_{o} + n P$
$Δ_{t} = \frac{4}{9} Δ_{o}$
Spectrochemical series
I $^{-} <$ Br $^{-} <$ Cl $^{-} <$ F $^{-} <$ OH $^{-} <$ H $_{2}$ O $<$ NH $_{3} <$ en $<$ CN $^{-} <$ CO
$Δ_{o} > P$ low spin $;$ $Δ_{o} < P$ high spin

Stability

$β_{n} = K_{1} K_{2} \dots K_{n};$ chelates are more stable (chelate effect)

d and f Block Elements Haloalkanes and Haloarenes