Comments on: The Pi Molecular Orbitals of Benzene https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/ Mon, 16 Oct 2023 15:55:23 +0000 hourly 1 https://wordpress.org/?v=6.6.2 By: Nidhi https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/#comment-674633 Mon, 16 Oct 2023 15:55:23 +0000 https://www.masterorganicchemistry.com/?p=10689#comment-674633 Why is the symmetry of the nodal planes broken in case of cyclopentadienyl anion for psi 2 molecular orbital?

]]> By: Postmodern Viewpoint of Physics (1) | Let Science Indulge Us https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/#comment-634865 Mon, 08 Aug 2022 14:38:51 +0000 https://www.masterorganicchemistry.com/?p=10689#comment-634865 […] Fig.2 Credit: Master Organic Chemistry […]

]]> By: 物理學的後現代觀點 - Let Science Indulge Us https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/#comment-634462 Mon, 01 Aug 2022 23:33:37 +0000 https://www.masterorganicchemistry.com/?p=10689#comment-634462 […] Fig.2 Credit: Master Organic Chemistry […]

]]> By: Shivam https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/#comment-591056 Fri, 25 Dec 2020 13:13:15 +0000 https://www.masterorganicchemistry.com/?p=10689#comment-591056 Thank you very much, i have found this place really helpful

]]> By: Tahniyath https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/#comment-589438 Mon, 14 Dec 2020 07:11:35 +0000 https://www.masterorganicchemistry.com/?p=10689#comment-589438 why p orbitals of first and third carbon of benzene are not displaced in psi 3 and psi 5 ?

]]> By: James Ashenhurst https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/#comment-556165 Sun, 09 Jun 2019 03:02:00 +0000 https://www.masterorganicchemistry.com/?p=10689#comment-556165 In reply to S. Lin.

To build the MO diagram, I would use a Frost Circle of an pentagon with the apex pointing down. You’ll have the first two pi electrons go in the bottom most level (the apex), but the next two energy levels are degenerate and are half-filled. This is the problem: the molecule has diradical character with two half-filled orbitals of equal energy, a very unstable situation.

]]> By: S. Lin https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/#comment-556133 Sat, 08 Jun 2019 19:39:44 +0000 https://www.masterorganicchemistry.com/?p=10689#comment-556133 Could you please explain why cyclopentadienyl cation is anti-aromatic? I know it has 4n pi electrons but the MO diagram indicates that it does not occupy any antibonding MO, it just does not fill bonding MO, what makes it very unstable? Is it because the electrons are not paired up in pi 2 and pi 3 MOs? Thank you very much.

]]> By: James Ashenhurst https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/#comment-553905 Tue, 23 Apr 2019 20:38:34 +0000 https://www.masterorganicchemistry.com/?p=10689#comment-553905 In reply to Rangan.

No, (4n+2) is just an algebraic expression of the series 2,6,10,14…. It has no physical meaning.

]]> By: Rangan https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/#comment-553860 Tue, 23 Apr 2019 14:29:23 +0000 https://www.masterorganicchemistry.com/?p=10689#comment-553860 Can we say this degeneracy in benzene is reflected in Hückel’s (4n+2) rule of aromaticity ?

]]> By: James Ashenhurst https://www.masterorganicchemistry.com/2017/05/05/the-pi-molecular-orbitals-of-benzene/#comment-551683 Sat, 06 Apr 2019 09:28:31 +0000 https://www.masterorganicchemistry.com/?p=10689#comment-551683 In reply to Hayder.

Glad you found it helpful Hayder.

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