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Topic: quantum mechanics- boxs  (Read 3072 times)

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Offline nigginz

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quantum mechanics- boxs
« on: March 19, 2009, 04:53:41 PM »
Hi i am a second year chemistry undergraduate and have a quantum mechanics assignment due in and was wondering if i could have some help on the final question.

Azulene C10H8 is an aromatic hydrocarbon containing delocalised 'pi' elctrons. As a model of this p-electron system, consider the mobile electrons to fit in a rectangular 2-D box of dimensions 5.00 x 4.65 amstrongs

i.) how many pi-electrons does azulene have?
ii.) identify the quantum numbers for the HOMO and LUMO of the of the pi-electron system.
iii) calculate the wavelength (in nm) of the lowest-energy absorption transition.


Grateful for any help you can offer. Thanks.

Offline FeLiXe

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Re: quantum mechanics- boxs
« Reply #1 on: March 22, 2009, 05:54:14 AM »
so, which questions can you answer?

i.) count the electrons
ii.) iii.) use the formula for a particle in a 2-dimensional box
Math and alcohol don't mix, so... please, don't drink and derive!

Offline nigginz

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Re: quantum mechanics- boxs
« Reply #2 on: March 23, 2009, 06:07:35 AM »
That is just one of the 7 questions in the assignment. I could do part i and hazard a guess at ii but i dont really have a clue about iii  :'(

Offline FeLiXe

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Re: quantum mechanics- boxs
« Reply #3 on: March 23, 2009, 01:19:18 PM »
the habit on this forum is that you present what you have and then someone tells you if you are correct and helps you out with what you are missing
Math and alcohol don't mix, so... please, don't drink and derive!

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