return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CHF2 (Ethane, 1,1-difluoro-)

using model chemistry: TPSSh/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at TPSSh/6-31G*
 hartrees
Energy at 0K-278.301137
Energy at 298.15K 
HF Energy-278.301137
Nuclear repulsion energy131.669610
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at TPSSh/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3163 3035 21.82 45.52 0.73 0.85
2 A' 3089 2963 55.65 129.79 0.23 0.38
3 A' 3075 2951 8.75 84.68 0.03 0.06
4 A' 1528 1466 3.48 15.97 0.75 0.86
5 A' 1462 1402 56.67 4.00 0.72 0.84
6 A' 1415 1357 14.67 1.62 0.71 0.83
7 A' 1176 1128 32.27 1.62 0.05 0.10
8 A' 1147 1101 93.16 4.94 0.75 0.86
9 A' 878 843 7.41 6.87 0.24 0.38
10 A' 555 532 5.63 0.86 0.55 0.71
11 A' 451 433 11.42 1.04 0.65 0.78
12 A" 3157 3029 17.28 59.98 0.75 0.86
13 A" 1530 1468 0.10 12.33 0.75 0.86
14 A" 1420 1362 35.93 9.42 0.75 0.86
15 A" 1172 1124 124.09 3.12 0.75 0.86
16 A" 970 931 62.26 5.36 0.75 0.86
17 A" 367 352 0.06 0.25 0.75 0.86
18 A" 250 240 0.07 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13402.9 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 12858.8 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at TPSSh/6-31G*
ABC
0.31078 0.29851 0.17082

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.327 0.167 0.000
C2 -0.911 1.031 0.000
H3 1.267 0.728 0.000
F4 0.327 -0.646 1.108
F5 0.327 -0.646 -1.108
H6 -1.795 0.388 0.000
H7 -0.927 1.665 0.891
H8 -0.927 1.665 -0.891

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.50921.09481.37401.37402.13382.14722.1472
C21.50922.19852.36002.36001.09341.09361.0936
H31.09482.19851.99971.99973.08112.54682.5468
F41.37402.36001.99972.21562.60792.63813.3026
F51.37402.36001.99972.21562.60793.30262.6381
H62.13381.09343.08112.60792.60791.78221.7822
H72.14721.09362.54682.63813.30261.78221.7818
H82.14721.09362.54683.30262.63811.78221.7818

picture of Ethane, 1,1-difluoro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 109.104 C1 C2 H7 110.149
C1 C2 H8 110.149 C2 C1 H3 114.247
C2 C1 F4 109.791 C2 C1 F5 109.791
H3 C1 F4 107.652 H3 C1 F5 107.652
F4 C1 F5 107.464 H6 C2 H7 109.156
H6 C2 H8 109.156 H7 C2 H8 109.105
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.440      
2 C -0.543      
3 H 0.139      
4 F -0.292      
5 F -0.292      
6 H 0.192      
7 H 0.178      
8 H 0.178      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.307 1.931 0.000 1.955
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.508 -0.078 0.000
y -0.078 3.479 0.000
z 0.000 0.000 3.496


<r2> (average value of r2) Å2
<r2> 72.197
(<r2>)1/2 8.497