Timeline for Does O2 have a color in the gas phase
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 5 at 14:18 | review | Suggested edits | |||
| Oct 6 at 6:01 | |||||
| Aug 22, 2014 at 15:16 | vote | accept | Caters | ||
| Aug 9, 2014 at 21:57 | comment | added | ron | @Greg Thanks for the clarification. I didn't think you were correcting my answer, that is why I avoided using words like "right" and "wrong" in my comment. I just wanted to elaborate your comment a bit further within the context of the original question, so that a reader would understand why, in this particular case, the photoconversion is spin-allowed. | |
| Aug 9, 2014 at 19:57 | comment | added | Greg | The goal of my comment was to add the term "spin-forbiden" as it is something OP may heard about and can connect. I did not correct or argued your description. | |
| Aug 9, 2014 at 18:22 | comment | added | ron | @Greg As mentioned above, the conversion of ground state, triplet oxygen to singlet oxygen involves the simultaneous absorption of one photon by 2 triplets to produce 2 singlets. Therefor, total spin can be conserved and the process is not spin forbidden, e.g. $\ce{ ^ ^ ~(v) (v) -> ^ (v)~ ^ (v) }$ | |
| Aug 9, 2014 at 16:22 | comment | added | Greg | It is a triplet-singlet transition, therefore it is spin forbidden. The transition can only occur if some other process compensate for the magnetic moment, which is more probable in a condensed phase. | |
| Aug 9, 2014 at 16:00 | history | edited | ron | CC BY-SA 3.0 |
added 111 characters in body
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| Aug 9, 2014 at 14:11 | history | answered | ron | CC BY-SA 3.0 |