Why does the water form an ordered structure around pentane if pentane has no partial positive or negative charges?
Quote from lecture 2:
"if one puts this [pentane] in a solution of water, this will cause all the water molecules to line up in a certain way, almost quasi-crystal around the aliphatic compound molecule. They'll be ordred in a certain layer around the aliphatic molecule without being able to form any strong hydrogen bonds with them"

Question

Why does the water form an ordered structure around pentane if pentane has no partial positive or negative charges? 
Quote from lecture 2: 
"if one puts this [pentane] in a solution of water, this will cause all the water molecules to line up in a certain way, almost quasi-crystal around the aliphatic compound molecule. They'll be ordred in a certain layer around the aliphatic molecule without being able to form any strong hydrogen bonds with them"

anonymous · Answer

I believe the water does not interact with the pentane because the pentane is not polar. As a result, the pentane preferably interacts with other pentane molecules rather than water (pentane insoluble in water). The water molecules surrounding the pentane will be in a lower energy state than the water molecules elsewhere (because of less favorable pentane-water interactions), which results in a "fixed" coat of water molecules around the pentane.

I hope that is clear :)