93
NOTES
Jan., 1955
TABLEI TORSIONAL OSCILLATIONS IN MOLECULES CgHmFnCIo- m-
Molecule
HaC-CH3 H sC-CH aF HaC-CHFz €I&-CF, HsC-CH&I HsC-CHC1z Hac-CCh
----
Previous valua9------. 6t (cm.-1)
V D (kcal./mole) 2.75-3.05 [ 3.9591 (3.94) 3.66 2.7-4.7
280 f 10 278 (250) 238 (215-280)
(2.7-3.045) 2.967 [3.705] [3.470]
(205) (214) 238 220
...
...
Ref.
1, 9 1 1 2,lO 11, 12
.
...
--
n Present data
VO (kcal./mole) 2.90 8.15 3.40 3.66 2.9 2.96
6t
(om.-’)
290‘ (250) (240) 238 (220) (215)
13, 1 17 1 1
3.0 (214) 3.44 -280 Hac-CFpCl 3.2 -220 HsC-CFClz ... 3.75 (87) FaC-CHzF ... 3.85 (74) FsC-CHPz (68-70) 14, 15 3.9 (68) 3.92 ( - 4 . 3 5 ) FaC-CFs (10.5) lo!) 3 6.8 (90) fiaC-CH2CI 22.3 111 3 10.1 93 FaC-CHC1z (
