How to write the lewis structure of carbon disulfide

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How to write the lewis structure of carbon disulfide

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How to write the lewis structure of carbon disulfide

  1. 1. How to write the Lewis structure of carbon disulfide, CS2 By José @ Periodic table with names http://periodictablewithnames.net
  2. 2. Steps to write the Lewis structure1. Find the number of valence electrons for each of the atoms in the molecule.The number of valence electrons is usually the same as the group number where the element is located.
  3. 3. The number of valence electrons for carbon is 4 (group 4)
  4. 4. The number of valence electrons for sulfur is 6 (group 6)
  5. 5. 2. Count the total number of valence electrons in the molecule:Sum the valence electrons from each atom in the molecule
  6. 6. For CS2• Total valence e. from C: 4 4 e. x 1 C = 4• Total valence e. from S: 6 6 e. x 1s = 6Total valence e. in the molecule: 4 + 6 = 10
  7. 7. 3. Use the octet rule to figure how many octet electrons the atoms should have:Most atoms need 8 electrons to complete their valence shieldHydrogen is an exception and needs only 2
  8. 8. For CS2• Carbon should have 8 valence electrons• Sulfur should have 8 valence electrons
  9. 9. 4. Draw an initial sketch of the molecule by placing the symbol of each atom in a diagramFor carbon disulfide, CS2 S C S
  10. 10. 5. Place the valence electrons of each atom around them, starting from the outer atoms
  11. 11. For CS2• Sulfur has 6 valence electrons:
  12. 12. For CS2• Carbon has 4 valence electrons:
  13. 13. 6. Each bond in a molecule is made up from two electrons.Each atom in the molecule need to be bonded together to its nearest atom.
  14. 14. For CS2
  15. 15. For CS2
  16. 16. Bond Bond
  17. 17. Count the number of electrons each atom has after forming a single bond:Each sulfur atom has 7 electrons, it needs 8
  18. 18. Count the number of electrons each atom has after forming a single bond:Carbon atom has 6 electrons, it needs 8
  19. 19. To complete the octet we would need to pair another couple of electrons for each sulfur atom
  20. 20. To complete the octet we would need to pair another couple of electrons for each sulfur atom
  21. 21. To complete the octet we would need to pair another couple of electrons for each sulfur atom
  22. 22. Now count the number of electrons around each atom: each atom should have 8 electrons
  23. 23. Each sulfur has 8 electrons around, its valence is complete.
  24. 24. Carbon has 8 electrons around, its valence is complete.
  25. 25. Practice writing the Lewis structure of any other molecule! For more resources on chemistry visit: Periodic table with names http://periodictablewithnames.net

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