May, 1938
1265
NOTES Add,
Alc.,
g.
g.
n-Butyl
240
300
n-Butyl n-Amyl s-Amyl Diethyl methyl {-Amyl
47 100 47 94 94
50 120 50 100 100
n-Butyl n-Amyl s-Amyl Diethyl methyl t-Amyl
64 65 65 65 65
50 60 60 60 60
Alcohol
% B. p. 756 mm. 8 . p.. OC. 'C. Mm. Bskers of Acetic Acid 3 80 124-126
Time, hrs.
ester
Esters of Monochloroacetic Acid 1.5 97 94 3 88 196 105 3 89 185 93 4 85 184 99 2 65 168 88
Est3 1.5 4 7 2
of Dichloroacetic Acid 102 98 124 94 207 93 198 95 95 75
197" 180"
106
9.3
Esters of Trichloroacetic Acid n-Butyl 82 50 3 98 111 n-Amyl 51 38 3 91 218 118 206 108 60 2.5 95 s-Amyl 81 Diethyl methyl 201" 105 163 100 5 80 t-Amyl 81 60 1.5 & lQIE 105 a These tend to decompose partly into olefin and acid.
new; some old esters are given for comparisons of yields. CHEMISTRY LABORATORY UNIVERSITY OF WASHINGTON SEATTLE, WASHINGTON RECEIVED MARCH7, 1938
38 35 27
30 43 37 48
a0 40 30
40 30 30 25 30
;;;Eoe
Chlorine, % Calcd. Found
1.0514 1.0475 1,04739 1.0827
21.59 21.59 21.59
21.81 21.65 21.62 21.61
1.1455 1.1210 1.1226 1.1230
35.63 35.63 35.63 35.63
35.52 35.29 35.35 35.72
1.2475 1.2084 1.2081 1.2505
45.59 45.59 45.59 45.59
45.90 45.55 45.71 45.73
21.99
The agreement is fair although the differences are somewhat larger than the usual estimates of
pt&sion of the two methods. D B P M OF~Cmcaarsm~ ~ UNIVERSITY
RECEIVEDAPRIL 6, 1938
O F PITTSBURGH
P ~ ~ ~ ~ B UPENNA. RGEI,
The Relative Partial Molal Heat Content of Sodium Bromide in Aqueous Solutions at 25' BY A. L. ROBINSON
A Correction
Harned and Crawford' have measured recently the electromotive forces of the cells Ag-AgBr/NaBr( m)/Na,Hg( wz
