Transition Steps

Moderators: Chem_Mod, Chem_Admin

Camille_Rousculp_3A
Posts: 17
Joined: Wed Sep 21, 2016 3:00 pm

Transition Steps

Postby Camille_Rousculp_3A » Mon Mar 06, 2017 4:53 pm

I am a little confused on the rules of transition steps.
In general, how do you know where to connect each of the atoms in the reaction?

Tara Ostad 1H
Posts: 28
Joined: Wed Sep 21, 2016 2:59 pm

Re: Transition Steps

Postby Tara Ostad 1H » Mon Mar 06, 2017 5:43 pm

Usually the atom, for electrophilic addition, will go to where the double bond is breaking. For SN2, the atom goes to the spot of the atom it is replacing (if that makes sense). The transition state is kind of just making the mechanism into 2 parts so it is easier to visualize what order it occurs in.

Camille_Rousculp_3A
Posts: 17
Joined: Wed Sep 21, 2016 3:00 pm

Re: Transition Steps

Postby Camille_Rousculp_3A » Mon Mar 06, 2017 11:02 pm

That helps, thanks!

NinaSheridan
Posts: 30
Joined: Wed Sep 21, 2016 2:58 pm

Re: Transition Steps

Postby NinaSheridan » Fri Mar 10, 2017 10:13 pm

Also, for electrophilic addition, we often have a main molecule with a double bond and a molecule with two elements. If a double bond is broken and an atom from the two-element molecule has been added, the other part of the two-part molecule will be added to the other side of the double bond.

Samuel_Vydro_1I
Posts: 21
Joined: Fri Jul 22, 2016 3:00 am

Re: Transition Steps

Postby Samuel_Vydro_1I » Sun Mar 12, 2017 6:59 pm

All bonds affected by arrows are shows as dashed

Andrea Medina 1A
Posts: 13
Joined: Wed Sep 21, 2016 2:58 pm

Re: Transition Steps

Postby Andrea Medina 1A » Mon Mar 13, 2017 10:12 pm

If we are breaking a bond do we show it as attached in the transition step or separately?

604805638
Posts: 19
Joined: Wed Sep 21, 2016 2:59 pm

Re: Transition Steps

Postby 604805638 » Thu Mar 16, 2017 10:48 am

I think you still have to use the dashed arrows in the transition step because in the transition step it still hasn't fully broken off yet

MariaReina_Garcia_3E
Posts: 11
Joined: Wed Nov 18, 2015 3:00 am

Re: Transition Steps

Postby MariaReina_Garcia_3E » Thu Mar 16, 2017 10:12 pm

I believe the dash arrows are only shown during the transition step to indicate what molecule is attaching and which one is leaving.


Return to “*Organic Reaction Mechanisms in General”

Who is online

Users browsing this forum: No registered users and 1 guest