Question

Dipole-dipole attraction question!
Out of HBr, H2Se, AsH3, and GeH4.
Why does GeH4 have the weakest dipole dipole attraction?? :O

Answer 1

pretty sure GeH4 is tetrahedral so the individual dipoles cancel out, so it wouldn't have a permanent dipole.

Answer 2

Just to elaborate, you might do well to look at the 3D structures of each molecule, and you'll see that GeH4 is the only one which is electrically symmetric:

http://en.wikipedia.org/wiki/Hydrogen_bromide
http://en.wikipedia.org/wiki/Hydrogen_selenide
http://en.wikipedia.org/wiki/AsH3
http://en.wikipedia.org/wiki/GeH4

Answer 3

electronically** symmetric :P

Answer 4

^ Yes. :P Typo.