general present, and the lattice constants were computed, assuming that the lattice is primitive and that no glide pkanw occur. If either or both of these conditions fail fa hold (as would be revealed only from Akl data), one or mow of the lattice cons&nk~would have to be doubled, with a eonsequent increase in the number of formula mi& p e p unit! cell. ImWitoy &o obtain further data prevented identification of the space group. The external shape of the small single crystal also ws9 nob sufficiently g o d
to permit identification of the point symmetry group, except t o identify the existence of a twofold axis of rotation. The second set of O-level diagrams was similar to the first, except for the occurrence of four additional, moderately weak reflections. These indicate a reduction in lattice a p e b y to #e triclinic system and require doubling of the a &. This is the result of distortions or defects suffered by the crystal during disorientation. In all probability, a motion or loss of groups of low diffracting power is involved, such s9 the
Infrared Analysis of a Mixture of 1,4Dihydroxy C4's
CS-9 1
H. 1. SPELL, The Dow Chemical Co., Freeport, Tex.
1
Slit Component Name Formula
No.
-I1
___
1.4-Wyrce-2-
-I-
_
'1,4-cis-&&ene-
2-diol
-
%
Av
Pfr.
~___
_
IC4Ho02
,---
I
-I
E
~ O N T ~ U B U T I ~oN f S my&dbgraphic
data for t b section &odd b aent to Walter C. M c C F O ~501 ~ , E& a d St., Chicago 16, FD.
Analysis of Toluene-Butylbenzene Mixtures R. J.
JAKOBSEN and C. D. SMITH Battelte Memodal Institute, Columbus, Ohio
cs-93
mm
Alit Component
100
0.1 _ 100 0.1
Inrtrumenf: Perkh-Elmer Model 2 1, NaCf prkar SompA Phose: Solution in corbon dhvWlde
Cdf Windows: NoCl Absorbance Meammment:
Cell Windows: NaCl Absorbance Meawrement:
Base line-
Inverse m a t r i x x Graphical-
Rebtiw Abrarbonce+Anafytkol ComponenilX 8.8
Point-L Successive opprox.--
1
2
3
Calculation:
Matrix:
7~ 0.412 0.017 0.023
9.67~ 0.394 0.467 0.159
9 * 44p 0.073 0.169 0.572
Material Purify: Reference compounds 99+% pure Commentrr All sample preparation should b e done In a dry atmosphere. ReluHve abrorbunces are given as the slope of the Beer's law concentration curves used expressed In terms of absorbance per 100% of cansthutvent.
Analysis of Benzene-Mesitylene Mixtures
Benzene
1
1 I
No.!
Mesitylene
CeHg
%
10-100
CsHl2
0-100
%
Pfr.
AV
11.97
l;i25
Length mm
ANALYTICAL CHEMISTRY
9.48
2.175 7.050
Reference compounds 99 +% pure
e Reiotive abroibances are given as the slope of the Beer's l a w concentration curves used expressed in terms of absorbance per 100% of constituent.
I
0.227 40 0.052
Base l i n e - L
Point--
Inverse matrix& Successive opprox.__ GI a phicaI
Relofive Absorbances"-Analytical Matrix: Componenfl?,
0.630 40 0.113 0.052
Theae data represent standard publication and submission is open to any one in accordance with regulations of ANALYTICAL CHEMISTFLY.The Coblentz Society is acting only as an aid to the journal.
1600
Material Purify:
mg/ml
fmm)
f0.1
2
Cdculofion:
AX or
I 1 1 1
1
Concn.
B.L.
15.25
Successive appro%-
9.26 15.250 0.800
Componentlk
Slit X or v
14.25-
Pohrt-
Rektive Abrorbancer'-Analytica~ Motru:
Cell Windows: NaCl Absorbance Measurement:
Accuracy
__ f O . 1 14.83
Inverse m o t r i x X Gruphical-
CS-92
Bottdle Memorlal Inrtltute, Columbus, Ohlo
Range
Bore l i n e - L
Inrfrumenf: Perkin-Elmer Model 2 1, NaCl prism Sample Phase: Solution In carbon disulfide
R. J. JAKOBSEN ond C. D. SMITH
Component Name Formulo
Concn.
___
Insfrumant: Perkin-Elmer Model I 12, NaCl prism Sample Pham: solution in ocetme
Cdculaficn:
2
RESEARCH supported in part by the United States Air Force through the Air Force Office of Scientific Reeea~chof the Air Research and Development Command under contract AF 18(603)-45. Reprcia permitted duction in whde or in for any purpose of the avernment.
Concn.
8 . 8 7 0.160 0.019 ~ ~ - _ _ _ _ 0-100 413.0 9 . 6 7 0.260 0.028 f2.O
0-100
C
