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 CH4 (Methane)

using model chemistry: PBEPBEultrafine/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at PBEPBEultrafine/6-311G**
 hartrees
Energy at 0K-40.459486
Energy at 298.15K-40.462487
HF Energy-40.459486
Nuclear repulsion energy13.339982
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 PBEPBEultrafine/6-311G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2972 2944 0.00      
2 E 1515 1501 0.00      
2 E 1515 1501 0.00      
3 T2 3089 3061 23.33      
3 T2 3089 3061 23.33      
3 T2 3089 3061 23.33      
4 T2 1290 1278 19.11      
4 T2 1290 1278 19.11      
4 T2 1290 1278 19.11      

Unscaled Zero Point Vibrational Energy (zpe) 9567.6 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 9480.5 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 PBEPBEultrafine/6-311G**
ABC
5.20475 5.20475 5.20475

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-311G**

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
H2 0.634 0.634 0.634
H3 -0.634 -0.634 0.634
H4 -0.634 0.634 -0.634
H5 0.634 -0.634 -0.634

Atom - Atom Distances (Å)
  C1 H2 H3 H4 H5
C11.09781.09781.09781.0978
H21.09781.79271.79271.7927
H31.09781.79271.79271.7927
H41.09781.79271.79271.7927
H51.09781.79271.79271.7927

picture of Methane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 109.471 H2 C1 H4 109.471
H2 C1 H5 109.471 H3 C1 H4 109.471
H3 C1 H5 109.471 H4 C1 H5 109.471
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.494      
2 H 0.124      
3 H 0.124      
4 H 0.124      
5 H 0.124      


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


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -8.469 0.000 0.000
y 0.000 -8.469 0.000
z 0.000 0.000 -8.469
Traceless
 xyz
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000
Polar
3z2-r20.000
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.093 0.000 0.000
y 0.000 2.093 0.000
z 0.000 0.000 2.093


<r2> (average value of r2) Å2
<r2> 10.110
(<r2>)1/2 3.180