2014_L5_Mechanisms

Are doubleheaded for 2 e 4 are singleheaded for 1 e 5

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Unformatted text preview: chanisms 5 •  use curved arrows to show electron movement •  the arrows: 1.  start in the middle of the bond being broken 2.  end on the more e/n atom or posi*vely charged atom 3.  are double ­headed for 2 e– 4.  are single ­headed for 1 e– 5.  show us the loca*on of the electrons aOer the bond is broken CHM1321 Reac*on Mechanisms 6 •  examples. O CH 3CH2 H H CH 3 N H H O C CHM1321 O O C O Reac*on Mechanisms 7 •  we will use a number system to indicate the star*ng point and end point of each electron ­ pushing arrow 1H •  example: 2 H C 4 3 O H 5 6 H •  in this case, the correct number sequence would be 5, 6 CHM1321 Reac*on Mechanisms 8 A.  3, 5 B.  8, 2 C.  2, 6 1 F 2 B 4F CHM1321 D.  1, 5 E.  6, 2 F.  5, 4 F3 5H + F H7 6 8 N H Reac*on Mechanisms F H B F N H H 9 •  Combine 1, 2, and 3 to make a complete picture •  examples: CHM1321 Reac*on Mechanisms 10 A.  B.  C.  D.  65, 32 24, 56 34, 56 25, 46 6 O O 5 + 4 C 3 N 2 1 C N CHM1321 Reac*on Mechanisms 11 •  those arrows were electron ­pushing arrows! O CHM1321 Reac*on Mechanisms 12 Draw the mechanisms for the following reac*ons. H + O H Cl O CH 3 O CHM1321 + H O Reac*on Mechanisms 13 A.  B.  C.  D.  42 ,63 13, 64 42, 51 14, 63 4 1 CH3 N 5 H2 + 6 3 H O H ? H CHM1321 Reac*on Mechanisms 14...
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