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OCRed equation; mhchem for chemical bonds
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andselisk ♦
andselisk ♦
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The degree of unsaturation is defined as the index of hydrogen deficiency (IHD) that determines the total number of rings and π bonds. It means the removal of two hydrogen atoms from a molecule is equal to one added DU.$\mathrm{DU}.$

enter image description here$$\text{rings} + \pi~\text{bonds} = C - \frac{H}{2} - \frac{X}{2} + \frac{N}{2} + 1$$

If you add a halogen to a molecule, you need to remove a hydrogen atom (decreased half-one DU).$\mathrm{DU}).$ If you do the same for a nitrogen atom, you need to remove a hydrogen atom from the molecule and add two others to the nitrogen (for amines as a saturated substituent), so you have one more hydrogen (increased half-one DU).$\mathrm{DU}).$ As a result, the number of halogen and nitrogen atoms must be considered in the equation, but about other atoms such as oxygen (C-OH)$(\ce{C-OH})$ and sulfur (C-SH),$(\ce{C-SH}),$ there is no change in the total number of hydrogen atoms when adding them as saturated substituents to a molecule. In

In the case of the unsaturated substituents such as imines and carbonyls, it's clear that the total number of hydrogen atoms decreases, so the DU$\mathrm{DU}$ increases.

The degree of unsaturation is defined as the index of hydrogen deficiency (IHD) that determines the total number of rings and π bonds. It means the removal of two hydrogen atoms from a molecule is equal to one added DU.

enter image description here

If you add a halogen to a molecule, you need to remove a hydrogen atom (decreased half-one DU). If you do the same for a nitrogen atom, you need to remove a hydrogen atom from the molecule and add two others to the nitrogen (for amines as a saturated substituent), so you have one more hydrogen (increased half-one DU). As a result, the number of halogen and nitrogen atoms must be considered in the equation, but about other atoms such as oxygen (C-OH) and sulfur (C-SH), there is no change in the total number of hydrogen atoms when adding them as saturated substituents to a molecule. In the case of the unsaturated substituents such as imines and carbonyls, it's clear that the total number of hydrogen atoms decreases, so the DU increases.

The degree of unsaturation is defined as the index of hydrogen deficiency (IHD) that determines the total number of rings and π bonds. It means the removal of two hydrogen atoms from a molecule is equal to one added $\mathrm{DU}.$

$$\text{rings} + \pi~\text{bonds} = C - \frac{H}{2} - \frac{X}{2} + \frac{N}{2} + 1$$

If you add a halogen to a molecule, you need to remove a hydrogen atom (decreased half-one $\mathrm{DU}).$ If you do the same for a nitrogen atom, you need to remove a hydrogen atom from the molecule and add two others to the nitrogen (for amines as a saturated substituent), so you have one more hydrogen (increased half-one $\mathrm{DU}).$ As a result, the number of halogen and nitrogen atoms must be considered in the equation, but about other atoms such as oxygen $(\ce{C-OH})$ and sulfur $(\ce{C-SH}),$ there is no change in the total number of hydrogen atoms when adding them as saturated substituents to a molecule.

In the case of the unsaturated substituents such as imines and carbonyls, it's clear that the total number of hydrogen atoms decreases, so the $\mathrm{DU}$ increases.

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Reihani
Reihani
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The degree of unsaturation is defined as the index of hydrogen deficiency (IHD) that determines the total number of rings and π bonds. It means the removal of two hydrogen atoms from a molecule is equal to one added DU.

enter image description here

If you add a halogen to a molecule, you need to remove a hydrogen atom (decreased half-one DU). If you do the same for a nitrogen atom, you need to remove a hydrogen atom from the molecule and add two others to the nitrogen (for amines as a saturated substituent), so you have one more hydrogen (increased half-one DU). As a result, the number of halogen and nitrogen atoms must be considered in the equation, but about other atoms such as oxygen (C-OH) and sulfur (C-SH), there is no change in the total number of hydrogen atoms when adding them as saturated substituents to a molecule. In the case of the unsaturated substituents such as imines and carbonyls, it's clear that the total number of hydrogen atoms decreases, so the DU increases.