Boiling PointMolecular Weight Chart for Higher Hydrocarbons D. S. DAVIS Wayne University, Detroit, Mich.
147
-I
16
4
*OO-FB0
-r
- P O U
T U D I E S of t h e
S
molecular weights and boiling points (at 1 mm. of mercury) of a number of higher h y d r o c a r b o n oils b y Mair and Willingham a n d b y Lucy' resulted in the expressions:
M
($)2'276
where T
=
uncorrected distilling temp. a t 1 F m . Hg,
K. n = number of carbon
CORRESPONDENCE
/I
Synthetic Antimalarials Not under Overseas Control SIR:The New York Jourm1 of Commerce in its July 1, 1940, issue, cites from IXDUSTRIAL ASD ENGINEERINQ CHEMISTRY, the statement that since atebrin "is manufactured here (United States) by a company controlled from overseas, i t would seem that no time should be lost in supporting research to give us an independent product of equal efficiency or in finding ways t o make atebrin or plasmoquin without restriction.', For many years Atabrine and Plasmochin (the respective American names for the synthetic antimalarials) have been manufactured under the control of a n American corporationWinthrop Chemical Company, 1nc.-which acquired the unrestricted rights to these discoveries for the United States and its possessions. The medical officials of several departments of the United States Government who received last year confidential information regarding facilities for meeting the demand, are now dealing efficiently with this important matter. Delivery has already been made on the first preparedness order received from the Government. If the supply of quinine should be interrupted, the capacity for the production of the synthetic antimalarials will naturally have to be increased. However, this poses a relatively simple problem, compared with the waste of time and funds involved in a needless research t o duplicate the efforts of chemists who have experience with these synthetics and are producing them routinely. Intermediate chemicals required for the synthetic antimalarials are available in America, and it is t o be expected that the chemical industry will respond effectively and patriotically to all emergency demands. H. G. Bertram
%EUE?
M
!
= molecular
WINTEZROP CHEMICAL COMPANY, INC. N E W YORIC, N. Y.
weight
F r o m t h e m m a y be derived a third equation relating t h e number of carbon atoms and the molecular weight:
EDITOR'S NOTE:The old Winthrop Chemical Company, Inc., incorporated in New York in 1919, was consolidated with the H. A. Meta Laboratories, Inc., incorporated in New York in 1917, to form a new Winthrop Chemical Company, Inc., also in New York, in 1935. This Winthrop Chemical Company (New York) is the sole owner of H. A. Metz Laboratories, Inc. (New York, 1937), and is in turn wholly owned by a holding company, another Winthrop Chemical Company, incorporated in Delaware in 1929. The New York corporation is a n operating unit and is one of several subsidiaries of the Delaware corporation. Half of the stock of the Winthrop Chemical Company (Delaware) is owned by Sterling Products, Inc. (Delaware), which elects two directors, and half by General Aniline & Film Corporation, which elects one director. General Aniline &: Film Corporation was recently formed to take over the American I. G. and the old General Aniline, among others. It is owned through four nominees, two in Switzerland, one in Amsterdam, and one in the United States, through shares held in a voting trust for undisclosed owners.
M = 13.91 n
All three expressions can be solved readily b y t h e c h a r t , in which 36 horizontal lines c u t t h e three scales i n consistent values. Thus, reading from right t o left, a 3 40 8 higher hydrocarbon exhibiting a boiling point 550of 231" C., under a pressure of 1 mm. of mercury would have an approximate molecular weight of 432 and contain 31 carbon atoms per molecule.
1:
1
Msir and Willingham, I N D .EIC. C H E Y . , 28, 1467 (1036); LUCY,I b i d . ,
30,959 (1938).
1148
