hi,
I attempted to solve the question. the question which is written under the picture is what I wrote. I is not the original question.
I tend to think that the second picture represent more the transition state because NH3 is not charged molecule therefore it can not be charged negatively. it can be charged positively because as I said before when it approaches the C which is charged half positively, the electrons tend to C and therefore NH3 became charged positively.
Is it a good assumption?
Thank you ahead, and sorry for Caps.
the δ+ and δ- are not formal charges, NH
3 can be negatively charged by the removal of a proton NH
2-...not that it applies here, I'm just saying.
I would say that during the transition state, NH
3 and Iodine should both be denoted with a δ-
only because as the Iodine leaves only a nucleophile (a group with a δ-) can displace it.
but you are correct in thinking that once the the NH
3 connects to the carbon it will have a formal
+ charge, but Iodine or the solvent will remove the proton.
I am not sure on this, I am only making an educated guess