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: BLYP/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at BLYP/aug-cc-pVQZ
 hartrees
Energy at 0K-40.504501
Energy at 298.15K-40.507506
HF Energy-40.504501
Nuclear repulsion energy13.388191
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 BLYP/aug-cc-pVQZ
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 2960 2960 0.00      
2 E 1525 1525 0.00      
2 E 1525 1525 0.00      
3 T2 3056 3056 23.62      
3 T2 3056 3056 23.62      
3 T2 3056 3056 23.62      
4 T2 1311 1311 10.52      
4 T2 1311 1311 10.52      
4 T2 1311 1311 10.52      

Unscaled Zero Point Vibrational Energy (zpe) 9554.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 9554.9 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 BLYP/aug-cc-pVQZ
ABC
5.24243 5.24243 5.24243

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

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
H2 0.632 0.632 0.632
H3 -0.632 -0.632 0.632
H4 -0.632 0.632 -0.632
H5 0.632 -0.632 -0.632

Atom - Atom Distances (Å)
  C1 H2 H3 H4 H5
C11.09381.09381.09381.0938
H21.09381.78621.78621.7862
H31.09381.78621.78621.7862
H41.09381.78621.78621.7862
H51.09381.78621.78621.7862

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 BLYP/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.971      
2 H 0.243      
3 H 0.243      
4 H 0.243      
5 H 0.243      


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 -8.599 0.000 0.000
y 0.000 -8.599 0.000
z 0.000 0.000 -8.599
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 2.626 0.000 0.000
y 0.000 2.626 0.000
z 0.000 0.000 2.626


<r2> (average value of r2) Å2
<r2> 10.156
(<r2>)1/2 3.187