NO₂ and NO

NO and N₂O

NO₂ and N₂O

N₂O and NO₂

CrO₂

VO₂

MnO₂

TiO₂

d – d transition

L $$\to$$ M charge transfer transition

$$\sigma$$ – $$\sigma$$* transition

M $$\to$$ L charge transfer transition

$$\left( A \right) - \left( {ii} \right),\,\,\left( B \right) - \left( {iii} \right),\,\,\left( C \right) - \left( {iv} \right),\,\,\left( D \right) - \left( i \right)$$

$$\left( A \right) - \left( {iii} \right),\,\,\left( B \right) - \left( i \right),\,\,\left( C \right) - \left( {ii} \right),\,\,\left( D \right) - \left( {iv} \right)$$

$$\left( A \right) - \left( {iii} \right),\,\,\left( B \right) - \left( {ii} \right),\,\,\left( C \right) - \left( {iv} \right),\,\,\left( D \right) - \left( i \right)$$

$$\left( A \right) - \left( {ii} \right),\,\,\left( B \right) - \left( i \right),\,\,\left( C \right) - \left( {iv} \right),\,\,\left( D \right) - \left( {iii} \right)$$