ENGRI111_27_C60

ENGRI111_27_C60 - ENGRI 111 New Carbon Forms Fullerenes...

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ENGRI 111 ENGRI 111 New Carbon Forms New Carbon Forms Fullerenes
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www.mustsee.com
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www.europa-pages.com
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Graphite & Diamond Graphite & Diamond 2-dimensional sp 2 bonding 3-dimensional sp 3 bonding
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Covalent bonds
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sp sp 3 3 and sp and sp 2 2 Hybridization Hybridization s, p x , p y sp 2 s, p x , p y, p z sp 3 p z CH 3 - CH 3 CH 2 = CH 2
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sp sp 2 2 Hybridization: Benzene Hybridization: Benzene p z s, p x , p y sp 2
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C C C C C C C C C C C C H H H H H H H H H H H H I II Resonance Structure Resonance Structure
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New Forms of Carbon New Forms of Carbon
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Nobel Prize in Chemistry, 1996 Nobel Prize in Chemistry, 1996 Robert F. Kurl, USA Sir Harold W. Kroto, UK Richard E. Smalley, USA "for their discovery of fullerenes"
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Buckminster Fuller Buckminster Fuller en.wikipedia.org Geodesic dome American Pavilion of Expo67
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History/Terms History/Terms 1985 (Sir) Harry Kroto (Sussex) Richard Smalley (Rice U) Harold Curl (Rice U) Interest in long-chain carbon molecules found near red giant start Laser ablation technique used to generate small clusters Mass spectrometry Species separated based on their mass
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Experimental Set-up Experimental Set-up
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www.chemistry.wustl.edu/~edudev/Fullerene/fullerene.html Mass Spectra Mass Spectra Heavy ions are accelerated less Ions can be separated based on mass
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Structure?
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