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: PBEPBE/daug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/daug-cc-pVDZ
 hartrees
Energy at 0K-278.051432
Energy at 298.15K 
HF Energy-278.051432
Nuclear repulsion energy130.509662
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 PBEPBE/daug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3090 3090 10.65 39.44 0.72 0.84
2 A' 3004 3004 34.65 129.42 0.21 0.35
3 A' 2991 2991 2.57 165.90 0.00 0.01
4 A' 1407 1407 5.71 4.59 0.75 0.86
5 A' 1359 1359 66.78 0.93 0.65 0.79
6 A' 1309 1309 0.95 0.92 0.38 0.56
7 A' 1108 1108 25.32 2.44 0.15 0.26
8 A' 1088 1088 99.21 3.84 0.45 0.62
9 A' 837 837 9.92 7.04 0.12 0.22
10 A' 537 537 4.87 1.04 0.24 0.39
11 A' 440 440 10.44 0.98 0.63 0.77
12 A" 3085 3085 7.69 53.67 0.75 0.86
13 A" 1405 1405 1.08 3.55 0.75 0.86
14 A" 1295 1295 11.67 4.30 0.75 0.86
15 A" 1069 1069 137.76 1.91 0.75 0.86
16 A" 881 881 91.28 2.65 0.75 0.86
17 A" 366 366 0.44 0.47 0.75 0.86
18 A" 216 216 0.04 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12743.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12743.2 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 PBEPBE/daug-cc-pVDZ
ABC
0.30600 0.29320 0.16794

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/daug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.322 0.172 0.000
C2 -0.903 1.051 0.000
H3 1.288 0.715 0.000
F4 0.322 -0.659 1.116
F5 0.322 -0.659 -1.116
H6 -1.810 0.423 0.000
H7 -0.899 1.692 0.898
H8 -0.899 1.692 -0.898

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.50741.10801.39171.39172.14712.14682.1468
C21.50742.21622.38112.38111.10351.10381.1038
H31.10802.21622.01672.01673.11192.55822.5582
F41.39172.38112.01672.23292.63892.65813.3283
F51.39172.38112.01672.23292.63893.32832.6581
H62.14711.10353.11192.63892.63891.80231.8023
H72.14681.10382.55822.65813.32831.80231.7968
H82.14681.10382.55823.32832.65811.80231.7968

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 109.670 C1 C2 H7 109.629
C1 C2 H8 109.629 C2 C1 H3 114.995
C2 C1 F4 110.366 C2 C1 F5 110.366
H3 C1 F4 107.017 H3 C1 F5 107.017
F4 C1 F5 106.680 H6 C2 H7 109.470
H6 C2 H8 109.470 H7 C2 H8 108.957
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/daug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 1.801      
2 C 0.486      
3 H -0.687      
4 F -0.581      
5 F -0.581      
6 H -0.148      
7 H -0.145      
8 H -0.145      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.397 2.256 0.000 2.291
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.905 0.449 0.000
y 0.449 -23.262 0.000
z 0.000 0.000 -25.788
Traceless
 xyz
x 2.620 0.449 0.000
y 0.449 0.585 0.000
z 0.000 0.000 -3.205
Polar
3z2-r2-6.410
x2-y21.356
xy0.449
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.736 -0.242 0.000
y -0.242 4.794 0.000
z 0.000 0.000 4.765


<r2> (average value of r2) Å2
<r2> 73.787
(<r2>)1/2 8.590