0环行 B.P Densities 院。 Greater intermolecular forces,higher b.p. .Dipole-dipole attractions not significantly different for different halides London forces greater for larger atoms Greater mass,higher b.p. Spherical shape decreases b.p. (CH3)3CBr CH3(CH2)3Br 73C 102°C ■Densities .Alkyl fluorides and chlorides less dense than water. .Alkyl dichlorides,bromides,and iodides more dense than water. B.P & Densities Greater intermolecular forces, higher b.p. Dipole-dipole attractions not significantly different for different halides London forces greater for larger atoms Greater mass, higher b.p. Spherical shape decreases b.p. (CH 3 ) 3CBr CH 3(CH 2 ) 3Br 73 C 102  C Densities •Alkyl fluorides and chlorides less dense than water. •Alkyl dichlorides, bromides, and iodides more dense than water