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: mPW1PW91/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-278.356340
Energy at 298.15K 
HF Energy-278.356340
Nuclear repulsion energy132.639915
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 mPW1PW91/aug-cc-pVTZ
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 3030 11.28 35.40 0.69 0.82
2 A' 3085 2956 33.39 118.40 0.21 0.34
3 A' 3074 2945 2.29 144.98 0.00 0.01
4 A' 1484 1421 5.82 4.19 0.75 0.86
5 A' 1437 1376 69.71 0.70 0.43 0.60
6 A' 1389 1331 0.96 0.69 0.41 0.59
7 A' 1167 1118 69.32 3.04 0.20 0.33
8 A' 1154 1105 67.31 2.66 0.54 0.70
9 A' 880 844 6.63 6.35 0.12 0.22
10 A' 572 548 4.77 0.80 0.29 0.45
11 A' 469 449 12.37 0.84 0.57 0.73
12 A" 3160 3028 7.28 47.24 0.75 0.86
13 A" 1484 1422 0.84 2.96 0.75 0.86
14 A" 1385 1327 17.30 3.82 0.75 0.86
15 A" 1153 1105 160.99 2.06 0.75 0.86
16 A" 955 915 66.35 2.21 0.75 0.86
17 A" 383 367 0.29 0.38 0.75 0.86
18 A" 230 220 0.05 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13310.5 cm-1
Scaled (by 0.9581) Zero Point Vibrational Energy (zpe) 12752.8 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 mPW1PW91/aug-cc-pVTZ
ABC
0.31809 0.30051 0.17329

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.320 0.163 0.000
C2 -0.895 1.038 0.000
H3 1.265 0.711 0.000
F4 0.320 -0.648 1.094
F5 0.320 -0.648 -1.094
H6 -1.789 0.416 0.000
H7 -0.896 1.669 0.886
H8 -0.896 1.669 -0.886

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.49741.09201.36261.36262.12482.12902.1290
C21.49742.18502.34912.34911.08861.08831.0883
H31.09202.18501.98451.98453.06872.52462.5246
F41.36262.34911.98452.18882.60432.62563.2823
F51.36262.34911.98452.18882.60433.28232.6256
H62.12481.08863.06872.60432.60431.77571.7757
H72.12901.08832.52462.62563.28231.77571.7727
H82.12901.08832.52463.28232.62561.77571.7727

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 109.484 C1 C2 H7 109.831
C1 C2 H8 109.831 C2 C1 H3 114.176
C2 C1 F4 110.353 C2 C1 F5 110.353
H3 C1 F4 107.386 H3 C1 F5 107.386
F4 C1 F5 106.869 H6 C2 H7 109.310
H6 C2 H8 109.310 H7 C2 H8 109.058
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.609      
2 C -0.688      
3 H 0.221      
4 F -0.396      
5 F -0.396      
6 H 0.200      
7 H 0.224      
8 H 0.224      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.366 2.237 0.000 2.267
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.470 0.480 0.000
y 0.480 -22.890 0.000
z 0.000 0.000 -25.379
Traceless
 xyz
x 2.665 0.480 0.000
y 0.480 0.534 0.000
z 0.000 0.000 -3.199
Polar
3z2-r2-6.399
x2-y21.421
xy0.480
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.349 -0.198 0.000
y -0.198 4.383 0.000
z 0.000 0.000 4.346


<r2> (average value of r2) Å2
<r2> 71.768
(<r2>)1/2 8.472