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: B1B95/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/TZVP
 hartrees
Energy at 0K-278.330511
Energy at 298.15K 
HF Energy-278.330511
Nuclear repulsion energy132.720934
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 B1B95/TZVP
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' 3177 3040 12.01 41.02 0.71 0.83
2 A' 3100 2966 39.24 113.30 0.26 0.41
3 A' 3086 2953 2.05 132.47 0.01 0.02
4 A' 1486 1422 6.32 8.13 0.75 0.86
5 A' 1443 1381 78.58 1.97 0.57 0.72
6 A' 1392 1332 2.24 0.94 0.75 0.86
7 A' 1171 1120 72.40 2.06 0.22 0.36
8 A' 1156 1106 75.53 3.36 0.64 0.78
9 A' 882 844 7.98 5.78 0.23 0.38
10 A' 572 548 5.69 1.02 0.50 0.66
11 A' 469 449 13.94 1.08 0.63 0.77
12 A" 3175 3038 7.90 51.45 0.75 0.86
13 A" 1487 1423 0.53 5.88 0.75 0.86
14 A" 1403 1343 26.17 8.45 0.75 0.86
15 A" 1158 1108 165.85 2.09 0.75 0.86
16 A" 957 916 69.08 4.32 0.75 0.86
17 A" 382 366 0.12 0.38 0.75 0.86
18 A" 236 226 0.05 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13366.4 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 12790.3 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 B1B95/TZVP
ABC
0.31806 0.30126 0.17349

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.320 0.163 0.000
C2 -0.895 1.036 0.000
H3 1.263 0.711 0.000
F4 0.320 -0.647 1.095
F5 0.320 -0.647 -1.095
H6 -1.787 0.414 0.000
H7 -0.896 1.667 0.885
H8 -0.896 1.667 -0.885

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.49581.09081.36211.36212.12242.12712.1271
C21.49582.18232.34682.34681.08761.08731.0873
H31.09082.18231.98341.98343.06502.52222.5222
F41.36212.34681.98342.18922.60132.62283.2797
F51.36212.34681.98342.18922.60133.27972.6228
H62.12241.08763.06502.60132.60131.77381.7738
H72.12711.08732.52222.62283.27971.77381.7710
H82.12711.08732.52223.27972.62281.77381.7710

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 109.467 C1 C2 H7 109.863
C1 C2 H8 109.863 C2 C1 H3 114.154
C2 C1 F4 110.314 C2 C1 F5 110.314
H3 C1 F4 107.402 H3 C1 F5 107.402
F4 C1 F5 106.949 H6 C2 H7 109.287
H6 C2 H8 109.287 H7 C2 H8 109.056
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.252      
2 C -0.345      
3 H 0.094      
4 F -0.204      
5 F -0.204      
6 H 0.142      
7 H 0.133      
8 H 0.133      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.369 2.343 0.000 2.372
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.420 0.507 0.000
y 0.507 -22.899 0.000
z 0.000 0.000 -25.493
Traceless
 xyz
x 2.775 0.507 0.000
y 0.507 0.557 0.000
z 0.000 0.000 -3.333
Polar
3z2-r2-6.666
x2-y21.479
xy0.507
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.800 -0.086 0.000
y -0.086 3.846 0.000
z 0.000 0.000 3.851


<r2> (average value of r2) Å2
<r2> 71.706
(<r2>)1/2 8.468