A Manual of the Chemistry of the Carbon Compounds

40 THE CHEMI8TRY OF
Boiling-point.
Propyl-benzene . . . . C0H6.C8H7 . . . . 153
Ethyl-methyl-benzene . C8PM Q|J 6 . . . .159
Trimethyl-benzene . . C8H4(CH3)8 . . . . 166
Normal Butyl Alcohol . C^OH . . . . 116
Isobutyl Alcohol . . . O^CH^OH . . 108
Secondary Butyl Alcohol £% j-CH.OH . . . 96
Tertiary Butyl Alcohol . C(CH8)gOH . . . . 82
By the subtraction of hydrogen tho boiling-point is generally
raised :—
Heptane. Heivtenc, Heptiue.
99° 100* 107°
Anthracene. Dibyilroauthuicuiic. Hcxbydroanthmceno.
above 360* 3oV B 290° 19
Hydrocarbons always boil at a lower temperature than their
derivatives, and the boiling-points of the latter rise when more
hydrogen is displaced :—
Ethane. Kthyliunim 1 . Ktliyl Chloiide.
gas* 2 18-J 0 2 'M 0
Ethyl Alcohol. Etheiio Chlondo. Etheno Alcohol.
, 4 24(
78 ; 4° 82-5°" 197-5 -5°
- Aoul
C,lf3O.t)H
" 118°
Ohloracptic Acid.
C.H.C2O.0H
P6°
Boum>. Aniline. Chloi-olicnzenc 1'henol.
CtlHtt
82°
CuHr,XIT2
.182°
CUH.C1
135°
C8HVOH
184°
Dichloidliiii/unc. Tuchloioheu/ciH'.
C,H,.NOS
205°
CH/'l,
172°
W l 3
210°
C,H4(NH.),
287°
Optical Properties.—"When a vay of light passes from one medium
into another, it is, as is well known, bent or refracted. This refractiou
is very different for different media, but for the same two media the
ratio between the sine of the angle of incidence and that of tho angle
of refraction is constant. Calling the angle of incidence i, and (hat
of refraction r, this law is expressed by—