degreesunsaturation

# degreesunsaturation - Calculating the number of degrees of...

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Calculating the number of degrees of unsaturation in hydrocarbons (note that this only applies when you have more than one carbon: - A saturated hydrocarbon has the molecular formula C n H (2n+2) and only has single bonds - An unsaturated hydrocarbon has fewer hydrogens than 2n+2, and therefore has double bonds, triple bonds, or rings - Calculation: #degrees of unsaturation = 2n +2 ( ) #of H ( ) /2 - Example 1: o C 6 H 12 #degrees of unsaturation = 2 6 +2 ( ) 12 ( ) /2 = 14 12 2 = 2 2 = 1 o 1 degree of unsaturation means that you could have: 1 double bond 1 ring - Example 2: o C 6 H 10 #degrees of unsaturation = 2 6 +2 ( ) 10 ( ) /2 = 14 10 2 = 4 2 = 2 o 2 degrees of unsaturation means that you could have: 2 double bonds 2 rings 1 double bonds + rings 1 triple bond - When you have substitution with things other than C and H, determine the hydrocarbon with the same number of degrees of unsaturation: o A monovalent atom acts like a hydrogen, so to determine the equivalent

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## This note was uploaded on 10/30/2010 for the course CHM 111 taught by Professor Stanitski during the Fall '08 term at F & M.

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degreesunsaturation - Calculating the number of degrees of...

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