We are going to use the formula below to calculate degrees of unsaturation:

Where: n = number of carbon atoms

a. C_{5}H_{8}N_{2}

$\frac{(2n+2)\mathbf{-}\mathbf{H}}{\mathbf{2}}\phantom{\rule{0ex}{0ex}}=\frac{\mathbf{(}\mathbf{2}\left(5\right)\mathbf{+}\mathbf{2}\mathbf{)}\mathbf{-}(8-2)}{\mathbf{2}}\phantom{\rule{0ex}{0ex}}=\frac{\mathbf{(}\mathbf{10}\mathbf{+}\mathbf{2}\mathbf{)}\mathbf{-}\mathbf{\left(}\mathbf{6}\mathbf{\right)}}{\mathbf{2}}\phantom{\rule{0ex}{0ex}}=\frac{\mathbf{\left(}\mathbf{12}\mathbf{\right)}\mathbf{-}\mathbf{\left(}\mathbf{6}\mathbf{\right)}}{\mathbf{2}}\phantom{\rule{0ex}{0ex}}=\frac{\mathbf{6}}{\mathbf{2}}$

Calculate the unsaturation number for each of the following compounds:

a. C_{5}H_{8}N_{2}

b. C_{5}H_{9}N

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