[ajay000222]

I'm doing an extended essay in Chemistry for IB and I was having some problems with this.
Is Dichloromethane more polar than trichloromethane (chloroform)?
because I would've thought it would be because chloroform has a bit more symmetry.
but chloroform's boiling point is higher than dichloromethane's.

[dunno260]

Boiling point isn't directly proportional to polarity though.  Molecular weight plays a big role as well.  Decane boils at 174C, but its a nonpolar hydrocarbon and has a higher BP than water.

[g-bones]

there are a few different quantitative values you could look up to compare these two, the most common is the dielectric constant, careful though because this is a macroscopic property and doesnt necessarily directly translate to molecules but its generally close enough.  also, you could look at the Et values which compares different solvents based on TMS as the standard and observes the UV transitions of a probe molecule (probably more info than you need  ) hope this helps