1030 
The three chloronitrobenzenes, likewise the three dichlorobenzenes 
were also treated in the same manner when it appeared, however, 
that the last named did not react with diethylamine even at 180°, 
but they reacted with NaOCH,. The disubstituted products were 
tested to ascertain whether from the velocity constants of their 
transformations, those of the compounds C,H,Cl,NO, could be 
deduced. Also this did not appear to be so. 
From the results obtained by Dr. pe Moor the following will be 
communicated. In all the cases investigated only chlorine was 
replaced, not the nitro-group. 
1. Chloronitrobenzenes. Of these was measured the reaction velocity 
with sodium methoxide and with diethylamine both in absolute 
methylaleoholie solution. Whereas with the first named compound 
the velocity constant for the p-compound was found greater than 
that of the o-compound, this was just the reverse with diethylamine. 
The reaction with diethylamine proceeds here as well as in all 
other cases much more slowly than with methoxide. (see table III). 
2. Dichlorobenzenes. These were heated with sodium methoxide 
at 175—176° when one Cl-atom was replaced by OH, as the solution 
was not quite anhydrous. For the constants (time in hours) was 
found, when 1 mol. of dichlorobenzene was made to react with 5 
mols. of methoxide : 
TABLE 1. 
EN AT ht 
| 
ortho | 0.0382 | 3.35 
meta 0.0506 | 4.44 
para | 0.014 | 1 
from which is shown the very remarkable result that the 7-com- 
pound is the one most rapidly converted, a fact that was quite 
unexpected. 
3. Nitrodichlorobenzenes. The most successful measurements obtained 
here are those with sodium methoxide as the values of K at different 
reaction periods were found to be pretty constant. In the measure- 
ments with diethylamine this was only the case with the isomerides 
1,2,4 and 1,2,5 (NO, on 1); with the others the value K diminished 
as time proceeded, Particularly interesting was the behaviour of the 
