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All results from a given calculation for CH4 (Methane)

using model chemistry: PBE1PBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 1A1
Energy calculated at PBE1PBE/3-21G
 hartrees
Energy at 0K-40.240903
Energy at 298.15K-40.243929
HF Energy-40.240903
Nuclear repulsion energy13.393611
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 PBE1PBE/3-21G
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 3063 2942 0.00 103.61 0.00 0.00
2 E 1638 1573 0.00 36.66 0.75 0.86
2 E 1638 1573 0.00 36.66 0.75 0.86
3 T2 3181 3055 19.19 47.66 0.75 0.86
3 T2 3181 3055 19.19 47.66 0.75 0.86
3 T2 3181 3055 19.19 47.66 0.75 0.86
4 T2 1406 1350 31.55 2.99 0.75 0.86
4 T2 1406 1350 31.55 2.99 0.75 0.86
4 T2 1406 1350 31.55 2.99 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10049.6 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 9651.6 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 PBE1PBE/3-21G
ABC
5.24668 5.24668 5.24668

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
H2 0.631 0.631 0.631
H3 -0.631 -0.631 0.631
H4 -0.631 0.631 -0.631
H5 0.631 -0.631 -0.631

Atom - Atom Distances (Å)
  C1 H2 H3 H4 H5
C11.09341.09341.09341.0934
H21.09341.78551.78551.7855
H31.09341.78551.78551.7855
H41.09341.78551.78551.7855
H51.09341.78551.78551.7855

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 PBE1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.861      
2 H 0.215      
3 H 0.215      
4 H 0.215      
5 H 0.215      


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 -8.236 0.000 0.000
y 0.000 -8.236 0.000
z 0.000 0.000 -8.236
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 1.711 0.000 0.000
y 0.000 1.711 0.000
z 0.000 0.000 1.711


<r2> (average value of r2) Å2
<r2> 9.926
(<r2>)1/2 3.151