HW: 2D Q5c

Moderators: Chem_Mod, Chem_Admin

Posts: 52
Joined: Fri Aug 30, 2019 12:17 am
Been upvoted: 1 time

HW: 2D Q5c

Postby ahuang » Sat Nov 02, 2019 1:00 pm

When determining whether which compound has bonds with greater ionic character, do you use the difference in electronegativity between the atoms? If so, how can you tell if C-O electronegativity difference is greater than that of C-S?

Posts: 102
Joined: Thu Jul 25, 2019 12:15 am

Re: HW: 2D Q5c

Postby nehashetty_2G » Sat Nov 02, 2019 1:09 pm

Yes, you use the electronegativity difference to determine if a bond is ionic, covalent, polar covalent, etc. Anything with an
EN difference > 2.0 is ionic. In terms of determining C-O vs C-S and which is greater you would need to compare the electronegativity of O and S. Remember that we learned the electronegativity trends which are that electronegativity increases as you move up a group and right on a period. Therefore, we know that O has a greater EN than S because it is higher in the group. Since O is greater than S, the C-O bond has a greater difference than C-S.

Shutong Hou_1F
Posts: 117
Joined: Sat Sep 14, 2019 12:17 am

Re: HW: 2D Q5c

Postby Shutong Hou_1F » Sun Nov 03, 2019 5:32 pm

The electronegativity of O is greater than that of S, because they have the same number of valence electrons, but O has more effective nuclear charge, because O has more protons, therefore more positive charges, in the nucleus.

Return to “Bond Lengths & Energies”

Who is online

Users browsing this forum: No registered users and 1 guest