Carbon-Carbon bonds: Hybridization Gina Peschel 05.05.2011 Gina - - PowerPoint PPT Presentation

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Carbon-Carbon bonds: Hybridization Gina Peschel 05.05.2011 Gina - - PowerPoint PPT Presentation

Mar 19, 2023 292 likes •618 views

Carbon-Carbon bonds: Hybridization Gina Peschel 05.05.2011 Gina Peschel Content Content Manifestation of Carbon sp -, sp - and sp- Hybridization Graphite and diamond Rolled carbon materials Rehybridization Reactivity

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Gina Peschel

Carbon-Carbon bonds: Hybridization

Gina Peschel 05.05.2011

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Gina Peschel

Content Content

  • Manifestation of Carbon
  • sp³-, sp²- and sp- Hybridization

Graphite and diamond

  • Rolled carbon materials
  • Rehybridization
  • Reactivity
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Gina Peschel

Manifestation of Carbon Manifestation of Carbon

a) Diamond b) Graphite c) Ionsdaleite d-f) Fullerenes (C60, C540, C70) g) Amorphous carbon h) Carbon nanotube.

Wikipedia, Stichwort: Kohlenstoff

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Gina Peschel

Bonding of molecular orbitals Bonding of molecular orbitals

http://www.grandienetti.org/Teaching/Chem121/Lectures/MOTheory

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Gina Peschel

Hybridization Hybridization

sp³-Hybridization sp²-Hybridization sp-Hybridization Hybridization Hybridization

http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/hybrv18.swf

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Gina Peschel

Energy Ground state Excited state sp³-Hybridization

sp³ sp³ - Hybridization

  • Hybridization

http://www2.chemie.uni-erlangen.de/projects/vsc/chemie-mediziner-neu/bindung/hybridisierung.html

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Gina Peschel

sp³ sp³ - Hybridization

  • Hybridization

http://groups.uni-paderbom.de/cc/lehrveranstaltungen/_aac/vorles/skript/kap_4/kap4_1/grafik/sp2-hybrid.gif

=>

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Gina Peschel

sp³ sp³ - Hybridization

  • Hybridization

Diamond

Wikipedia, Stichwort: Kohlenstoff http://german.alibaba.com/product-free-img/diamond-saw-blade-brick-master-33502694.html

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Gina Peschel

Bandstructure of diamond Bandstructure of diamond

Eg = 5 eV

http://www.diamonds-are-forever.org.uk/diamond-structures.html, ,http://static.cosmiq.de/ ,http://rosenthal-diamonds.com http://www.nextnano.de/nextnano3/tutorial/1Dtutorial_TightBinding_bulk_GaAs_GaP.htm

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Gina Peschel

Diamond

Color Hardness

http://german.alibaba.com/product-free-img/diamond-saw-blade-brick-master-33502694.html http://www.diamonds-are-forever.org.uk/diamond-structures.html, http://www.silverstar-consulting.de/assets/images/gluehbirne.jpg ,http://static.cosmiq.de/ ,http://rosenthal-diamonds.com

Crystal structure

  • Electr. conductivity
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Gina Peschel

Hybridization Hybridization

sp³-Hybridization sp²-Hybridization sp-Hybridization Hybridization Hybridization

http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/hybrv18.swf

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Gina Peschel

sp² sp² - Hybridization

  • Hybridization

Energy Ground state Excited state sp²- Hybridization

http://www2.chemie.uni-erlangen.de/projects/vsc/chemie-mediziner-neu/bindung/hybridisierung.html http://wps.prenhall.com/wps/media/objects/724/741576/Instructor_Resources/Chapter_01/Text_Images/FG01_15.JPG

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Gina Peschel

sp² sp² - Hybridization

  • Hybridization

http://www.grandienetti.org/Teaching/Chem121/Lectures/MOTheory Wikipedia, Stichwort: Kohlenstoff

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Gina Peschel

sp² sp² - Hybridization

  • Hybridization

Graphite

Wikipedia, Stichwort: Hybridisierung http://www.allmystery.de/dateien/uh60967,1273172966,bleistift-6.png

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Gina Peschel

S.Reich, C.Thomson, J. Maultzsch: Carbon Nanotubes, Basic concepts and Physical Properties, 2004, Wiley-VCH http://www.physics.leidenuniv.nl/institute/news/image126.jpg http://www.silverstar-consulting.de/assets/images/gluehbirne.jpg http://gwydir.demon.co.uk/jo/minerals/pix/graphite1.jpg

Bandstructure of graphene Bandstructure of graphene

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Gina Peschel

Graphite

Color Hardness

http://www.allmystery.de/dateien/uh60967,1273172966,bleistift-6.png http://www.silverstar-consulting.de/assets/images/gluehbirne.jpg http://gwydir.demon.co.uk/jo/minerals/pix/graphite1.jpg ,http://www.karakal.cz/web/index.php?page=tech

Crystal structure

  • Electr. conductivity
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Gina Peschel

Diamond and graphite

Color Hardness

http://german.alibaba.com/product-free-img/diamond-saw-blade-brick-master-33502694.html http://www.allmystery.de/dateien/uh60967,1273172966,bleistift-6.png http://www.diamonds-are-forever.org.uk/diamond-structures.html, http://www.silverstar-consulting.de/assets/images/gluehbirne.jpg http://gwydir.demon.co.uk/jo/minerals/pix/graphite1.jpg ,http://www.karakal.cz/web/index.php?page=tech ,http://rosenthal-diamonds.com

Crystal structure

  • Electr. conductivity
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Gina Peschel

Hybridization Hybridization

sp³-Hybridization sp²-Hybridization sp-Hybridization Hybridization Hybridization

http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/hybrv18.swf

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Gina Peschel

http://www.grandienetti.org/Teaching/Chem121/Lectures/MOTheory http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/hybrv18.swf

sp sp - Hybridization

  • Hybridization
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Gina Peschel

http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/hybrv18.swf

Hybridization - summary Hybridization - summary

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Gina Peschel

Curved carbon materials - Carbon nanotubes Curved carbon materials - Carbon nanotubes

Wikipedia, Stichwort: Carbon Nanotubes

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Gina Peschel

rs1.physik.uni-dortmund.de/sem/c60/kap5.htm Ouyang Yuy, Peng Jing-Cui), Wang Hui, Peng Zhi-Hua, 2008 Chinese Phys. B 17 3123

a) Graphene

Curved carbon materials - Rehybridization Curved carbon materials - Rehybridization

  • Tilting angles of π-orbitals
  • Wavefunction of π- and σ- orbitals
  • Degree of hybridization

b) C20

δ = a/(2 √3 d )

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Gina Peschel

Curved carbon materials - Rehybridization Curved carbon materials - Rehybridization

Graphene

a) Antibinding π* orbital (conduction band) b) Binding π orbital (valence band)

Carbon nanotube

Rehybridization orbital

S.Reich, C.Thomson, J. Maultzsch: Carbon Nanotubes, Basic concepts and Physical Properties, 2004, Wiley-VCH

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Gina Peschel

Reactivity Reactivity

Curved carbon materials - Reactivity Curved carbon materials - Reactivity

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Gina Peschel

Curved carbon materials Curved carbon materials Curved carbon materials - Reactivity Curved carbon materials - Reactivity

  • S. Niyogi et al., Acc. Chem. Res. 2002, 35, 1105-1113
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Gina Peschel

  • S. Park et al., Nano letters 2003, Vol.3, No.9 1273-1277

Curved carbon materials - Reactivity Curved carbon materials - Reactivity

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Curved carbon materials - Reactivity Curved carbon materials - Reactivity

http://www.ifkp.tu-berlin.de/menue/arbeitsgruppen/ag_thomsen http://nepachem.blogspot.com/2010/12/short-introduction-on-carbon-nano-tube.html

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Curved carbon materials - Fullerene Curved carbon materials - Fullerene

http://www.chemie.uni-erlangen.de/hirsch/

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Summary Summary

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Gina Peschel

Thank you for your attention!