Welcome Guest Search | Active Topics |

Tag as favorite
Altius FL3 Chem Q30
Options
Previous Topic Next Topic
Nicole_5521
#1 Posted : Friday, July 02, 2021 6:47:30 PM
Rank: Advanced Member

Groups: Registered
Joined: 4/30/2020
Posts: 71

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hello,

For Q30 in Altius FL3 Chem section, could you explain how acetylene has an electron deficiency? I thought multiple bonds would make something a lewis base, so having electron density.

Thanks!
Back to top
Report? | Edit by user
INSTR_Katrina_128
#2 Posted : Monday, July 05, 2021 2:24:18 PM
Rank: Advanced Member

Groups: Registered
Joined: 5/18/2021
Posts: 73

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
This question is very tricky. Boo. 😫

First, the text tells us in paragraph 3 that the amino acid-derived PRO-NUCLEOPHILE was reacted with an acetylene derivative. This implies that the acetylene derivative MUST BE the electrophile.

Note: a pro-nucleophile just means something that can easily BECOME a nucleophile.

So, we have to accept that from the wording of the text, we have an electrophile. Therefore, it's an ACID. Since triple bonds aren't particular acidic, they don't donate H's very well. Therefore, this is not a Brønsted acid. Also, there are no obvious H's to donate. Instead, it's a Lewis acid, which is based on electron transfer.

pKa acetylene = 25 (for example --> indicates that acetylene is a poor H donor)
Back to top
Report?
Users browsing this topic
Guest (2)
Tag as favorite
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Clean Slate theme by Jaben Cargman (Tiny Gecko)
Powered by YAF | YAF © 2003-2009, Yet Another Forum.NET
This page was generated in 0.066 seconds.