Talk:Valence bond theory

message: Also, something about the presentation in the chemical bond article, in relation to valence bond theory and molecular orbital theory, seems out of place or out of historical order.  I'm still researching and reading into this so it may take some time.  I'm also thinking about starting a time-line table in the molecular orbital theory page (which is currently a redirect).  I already have the table, in my computer file, up to about 17 key people.  Any comments?
:Yes, the chemical bond page is a bit of a mess. I have been trying to improve it, but others have ideas. It also gets a lot of vandalism. Let me look at your table. You could e-mail it to me if you like. I have e-mail enabled from my user page. MO theory should talk about simple quantitative calculations and then point to Hartree-Fock theory. We also have MO diagram and much else. --Bduke 01:25, 21 December 2006 (UTC)
replies: text: O.K. I'll send you the table, but don't make fun of it, I am still a little blurry as to the difference between VBT and MOT; to me they seem about the same?  I'll continue to be reading about these theories, with focus on modern molecular orbital theory, as to how it came into inception, over the next few weeks (this I will likely fiddling with related article in this area).  If you want to remove any of my contribs from whatever related article, just paste them here: Talk:Valence bond theory/notes so that we can discuss the issue.  Seeing that you made a VBT computer program, you are probably more of an expert on the topic than I am. --Sadi Carnot 01:41, 21 December 2006 (UTC)
replies: text: I do know about VB theory and have for 40 years, but whether I can write simply about it is another matter. I'll not make fun of your table and will discuss it only by e-mail. I'm probably going to leave any major edit in this area until after the time my kids are here. --Bduke 02:31, 21 December 2006 (UTC)
replies: text: I couldn't figure out how to attach the file in Wiki-mail, so I typed it up here: History of molecular orbital theory.  Use the talk page there if you want to help me (or correct me) build the table; I'm guessing that we can do one table for both valence and orbital theories? --Sadi Carnot 02:40, 21 December 2006 (UTC)
thread_title: [[Chemical bond]] article

message: Another note, is the Heitler-London theory is not in WP, from what I know?  The main page, for example, lists this: Heitler-London theory (1927), which just goes to bios?  Another point I have, is that valence bond theory did not just "pop" into existence in 1927; it is built on the shoulders of hundreds of others. --Sadi Carnot 00:56, 21 December 2006 (UTC)
replies: text: Heitler-London theory should not have its own article but be central here along with the various improvements that followed. Very little just pops into existance but that does not mean that the shoulders of others have to be discussed everywhere. VB theory starts with Heitler and London. It builds on Lewis and other idea of valence on the one hand and on Schrodinger and his equation and the solutions for the H atom, plus Pauli and so on, on the other hand. We can reference back all these "shoulders". Any text starts the discussion of VB theory with Heitler and London. I must get on to other things. --Bduke 01:25, 21 December 2006 (UTC)
replies: text: I'll have to find and read the Heitler-London paper before I can comment on this. --Sadi Carnot 01:55, 21 December 2006 (UTC)
replies: text: Please, read accounts in modern texts and you will then understand the modern terminology. The original paper is not that readable I think. Try pg 114 on in "Coulson's Valence", 3rd Ed, by Roy McWeeny, or section 13.10 of "Quantum Chemistry" by Ira Levine, 4th Ed. Also, it very important to understand several papers that extend it by varying the orbital exponent, adding ionic terms, etc. Historically the HL paper was very important but we have to put it into the larger picture now. --Bduke 02:31, 21 December 2006 (UTC)
replies: text: Agreed.  I did yesterday order a copy of Coulson's Valence (1961 ed.).  Presently, however, I am digging my way around the historical roots of both theories before digging into the modern versions.  Running out of time for the day (I'll talk more next week). Adios: --Sadi Carnot 02:51, 21 December 2006 (UTC)
thread_title: Other comments

message: According to VBT, when the two atoms A and B approach each other, then there are two types of attractive forces that develop between them( the repulsive forces also develop, but Iam not discussing about it here):
1. Between nucleus of Atom A and electron of atom A.
2. Between Nucleus of Atom A and electrons of atom B and vice versa.
Reference : NCERT class XI (INDIA)
Can anyone explain how the first case is possible?
Nshul2007 (talk) 23:06, 7 January 2009 (UTC)
thread_title: Question

message: Please consider adding a section on the drawbacks of Valence Bond Theory-
(i) The origin of their absorption spectra could not be explained.
(ii) Different complexes of the same metal show different colours.
(iii) Relative stabilities of different complexes could not be explained.
Ramakrishnan.nikhil (talk) 05:55, 8 September 2013 (UTC)
replies: text: What is your source that says that these are drawbacks? --Bduke  (Discussion) 07:37, 8 September 2013 (UTC)
thread_title:  Drawbacks of Valence Bond Theory 

message: Hi all, I proposed merging the problematic article Electronic structure into Electronic band structure. That gathered little discussion and did not pass. A new proposal was put forward to merge the page molecular orbital theory or possibly here instead. Please leave a comment if you have an opinion on the merger or the future of the Electronic structure article in general. The discussion link is on Electronic band structure still, discuss here. Thank you. Footlessmouse (talk) 22:50, 10 October 2020 (UTC)
replies: text: The fact that you have put this comment here reinforces the comment I added on Talk:molecular orbital theory. Electronic structure includes valence bond theory, molecular orbital theory and many other theories. I think Electronic structure just needs improving. --Bduke (talk) 23:05, 10 October 2020 (UTC)
thread_title:  Merger proposal 

message: — Assignment last updated by Ahlluhn (talk) 00:58, 31 May 2024 (UTC)
thread_title: Wiki Education assignment: 4A Wikipedia Assignment