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Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there. You can also find the Exam Thread list for A-levels here and GCSE here.
Just quoting in Puddles the Monkey so she can move the thread if needed
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Original post by CPSohan
Haloalkanes with hydrogen atoms as well as halogen atoms , are polar. So why can't they form Hydrogen bonds with water molecules ?
Why are these haloalkanes still insoluble in water, despite the fact that they are polar ?
Why are these haloalkanes still insoluble in water, despite the fact that they are polar ?
They could dipole dipole to water, but not hydrogen bond as they do not have hydrogen atoms attached to an electronegative element (N, O).
However, haloalkanes are slightly polar, BUT they usually have relatively high molar masses. This makes their London dispersion forces relatively strong, so they would rather bond to themselves than to water (if they had a choice).
Original post by charco
They could dipole dipole to water, but not hydrogen bond as they do not have hydrogen atoms attached to an electronegative element (N, O).
However, haloalkanes are slightly polar, BUT they usually have relatively high molar masses. This makes their London dispersion forces relatively strong, so they would rather bond to themselves than to water (if they had a choice).
However, haloalkanes are slightly polar, BUT they usually have relatively high molar masses. This makes their London dispersion forces relatively strong, so they would rather bond to themselves than to water (if they had a choice).
Thank you very much.
Original post by CPSohan
Haloalkanes with hydrogen atoms as well as halogen atoms , are polar. So why can't they form Hydrogen bonds with water molecules ?
Why are these haloalkanes still insoluble in water, despite the fact that they are polar ?
Why are these haloalkanes still insoluble in water, despite the fact that they are polar ?
For a molecule to form hydrogen bonds, the molecule must be highly electronegative and this highly electronegative molecule must be directly bonded to oxygen. For example, Flourine, Oxygen and Nitrogen are examples of highly electronegative elements.
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