About the ads

G-chem question----->Molecular geometry

Discussion in 'DAT Discussions' started by Imanm, Jul 7, 2010.

  1. SDN is a nonprofit organization. Services are made possible through the generous support of SDN members and sponsors. Thank you.

    Thanks to Crack the DAT

    Thanks to DAT Destroyer
  1. Imanm

    Imanm

    Joined:
    May 20, 2010
    Messages:
    95
    Status:
    Dental Student
    SDN 2+ Year Member

    SDN Members don't see this ad. (About Ads)
    What is the molecular geometry of Iodine in IF4-????
  2. Jia7

    Jia7

    Joined:
    Feb 28, 2009
    Messages:
    103
    SDN 5+ Year Member
    IF4- has 5 electron domains (1 lone pair of e-'s) or sp3d hybridization. Electron domain geometry will be trigonal bipyramidal. Since it is attached to 4 atoms and has one lone pair its molecular geometry is See-saw.
  3. Imanm

    Imanm

    Joined:
    May 20, 2010
    Messages:
    95
    Status:
    Dental Student
    SDN 2+ Year Member
    thank you Jia.
    ok great thats what I thought but the anwer key says its Octahedral so I got confused. can anyone else confirm see-saw just because I am OCDing.
    Thank you
  4. nainaaz

    nainaaz

    Joined:
    Jan 19, 2010
    Messages:
    29
    Status:
    Pre-Dental

    hmm.. IF4- have 6 domain (4 bonded to fluorine and 2 lone pairs of e-s) total 36 es-

    so it will have square planar shape specifically... or it has sp3d2 conf. so octahedral, if given will be correct answer choice also
  5. jirotrom

    jirotrom

    Joined:
    Mar 5, 2008
    Messages:
    340
    Status:
    Dental Student
    SDN 5+ Year Member
    correct!:thumbup:
  6. Jia7

    Jia7

    Joined:
    Feb 28, 2009
    Messages:
    103
    SDN 5+ Year Member
    nainaaz is correct. I calculated incorrectly. The calculations should be 7*5 = 35 valence electrons + 1 negative charge = 36 - 8 bonded electrons = 28 - 6(4) lone pairs e-'s on the 4F's = 4 and that should give you 2 lone pair of electrons on I.

    The electron domain geometry is octahedral but the molecular geometry is square planar.
  7. Imanm

    Imanm

    Joined:
    May 20, 2010
    Messages:
    95
    Status:
    Dental Student
    SDN 2+ Year Member
    K thank you all.
  8. shiftypoptart

    shiftypoptart

    Joined:
    Mar 16, 2010
    Messages:
    215
    Status:
    Dental Student
    SDN 2+ Year Member
    Yup this is definitely square planar for molecular geometry and octahedral for electron domain geometry but they almost never ask for the electron domain geometry. Its always good to keep an eye out for when they do ask about either cause it is different when you have lone pairs.

Share This Page


About the ads