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C asked in Science & MathematicsChemistry · 5 years ago

Chemistry Question... I am NOT IN ORGANIC CHEMISTRY so I have no idea what this is... Due soon... PLEASE HELP?

1. Based on what you know about intermolecular forces, would neutral or protonated putrescine have a higher boiling point?

2. What is the molecular geometry/shape about both N atoms in neutral putrescine?

3. What is the molecular geometry/shape about both N atoms in protonated putrescine?

Update:

So I figured out that protonated putrescine would have a higher boiling point because of its charges on the structure, which make it ionic and therefore since it is ionic it would have a higher point. Since ionic compounds tend to have super high boiling points most of the time. But I still don't understand 2 &3 about the MOLECULAR SHAPE. Does someone understand this part???

Help with that= Best answer points

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  • Iggy
    Lv 7
    5 years ago

    1. A simple web search will give the structure overall for putrescine [1]. Protonation will introduce electrical charge, which will always result in strong debye ion-dipole forces and therefore the protonated putrescine should have a higher boiling point.

    2. The geometry about the nitrogen in neutral form will be trigonal pyrimidal, which is the same as ammonia

    3. The geometry about the protonated form will be tetrahedral, with the additional proton taking the place in a simmilar configuration to the ammonium ion.

    Update - the technique to use for geometry is the valence shell electron repulsion (VSEPR) model [2]. It uses the combination of bonding and non-bonding valence electrons to determine geometry. Note that non-bonding electrons still contribute to the molecular shape.

    Source(s): [1] https://en.wikipedia.org/wiki/Putrescine [2] https://www.angelo.edu/faculty/kboudrea/index/Hand...
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