172.
Diphenylacetonitrile
HARRY A. ROSE, Eli Lilly and Co., Indianapolis 6, Ind.
,+7> L/, CH--C=IL' \
C Y
Diphenylacetonitrile can be crysDtallized C.fromTheethanol or from resulting crystals IPHEKYL.4CETOSITRILE
Skellysolve are blades elongated parallel to the b axis. The x-ray ponder diffraction dat'a were obtained using a camera 114.6 nim. in diameter and clironiium radiatioii with vanadium filter. --Iwave length value of 2.2896 A. was used in the calculations. The indesing was done on the basis of single CI terns around tlx. b nntl c nxcs.
Beta Angle.
116"13'.
X-Ray Powder Diffraction Data Cell Dimensions. a. = 16.5t -4., d 1/11 hk i fl iCalrd.) bo = 6.34 A., co = 11.57 A. 10.27 0.10 00l 10. 38 Formula Weights pcr Cell. 4. 7.8G 0.05 20 1 7.91 Formula Keight. 193.24. 7.44 0.20 '100 7.42 Densit?. 1.182 grams per cc. (flota5.57 0.10 110 d.8:1 tion), 1.181 grams per cr. (x-ray). 5.40 1.00 011 6.41 /a. Space Group. C211~--P21 5,lB 0.03b 002,201 5.19,5.19
X-RAYDIFFRACTIOK D A T A
OPTICALPROPERTIES Refractive Indices. p' (in 001)
1.67, y > 1.70. Optic Axial Angle. 2 V = 40 (cstimated). Optic Axial Plane. Perpendicular to 010. =icutc Bisectrix. CY. Optic Sign. Segativc. Cutinction. 9 a = 23" (in ol)tiiv
a).Orientation.
y =
FCSIOXBEHAVIOR.Iliphenylnc~c~tonitrile melts in the range 73-5" C. :is determined on a Kofler hot stage. On
acoid { O O l ] . ,ixial Ratio. 1.1825.
cooling, crystah appear 17 hich are blades lying on tlir 001 face. S o polymorphism n a s observed.
=
1.2f;Og: 1 :
0.30 0 30 0 30 0 30
d 14 2,998 2.918 2.88:1 2 . (is4 2,532 2,471
4.82 4 12 4 02 3 86 3 71 3 58 3 46 3 17 3 11 2,985 2,915
210 4oi 012 203 400 202 00:3 020 212 415
0 40 0 10 0 20 005 0 10
:
