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 GaAs (Gallium arsenide)

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 3Π
2 1 yes C*V 1Σ

State 1 (3Π)

Jump to S2C1
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-4140.940561
Energy at 298.15K 
HF Energy-4140.940561
Nuclear repulsion energy212.721214
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 B3PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 231 221 23.29      

Unscaled Zero Point Vibrational Energy (zpe) 115.3 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 110.6 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 B3PW91/3-21G*
B
0.07251

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Ga1 0.000 0.000 -1.312
As2 0.000 0.000 1.233

Atom - Atom Distances (Å)
  Ga1 As2
Ga12.5449
As22.5449

picture of Gallium arsenide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Ga 0.176      
2 As -0.176      


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 -0.786 0.786
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.043 0.000 0.000
y 0.000 -33.043 0.000
z 0.000 0.000 -40.870
Traceless
 xyz
x 3.913 0.000 0.000
y 0.000 3.913 0.000
z 0.000 0.000 -7.826
Polar
3z2-r2-15.652
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 8.226 0.000 0.000
y 0.000 8.226 0.000
z 0.000 0.000 15.365


<r2> (average value of r2) Å2
<r2> 125.789
(<r2>)1/2 11.216

State 2 (1Σ)

Jump to S1C1
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-4140.894565
Energy at 298.15K 
HF Energy-4140.894565
Nuclear repulsion energy213.414601
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 B3PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 238 228 21.66      

Unscaled Zero Point Vibrational Energy (zpe) 119.0 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 114.1 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 B3PW91/3-21G*
B
0.07298

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Ga1 0.000 0.000 -1.308
As2 0.000 0.000 1.229

Atom - Atom Distances (Å)
  Ga1 As2
Ga12.5366
As22.5366

picture of Gallium arsenide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Ga 0.121      
2 As -0.121      


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 -0.289 0.289
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.527 0.000 0.000
y 0.000 -29.320 0.000
z 0.000 0.000 -40.545
Traceless
 xyz
x -2.594 0.000 0.000
y 0.000 9.716 0.000
z 0.000 0.000 -7.122
Polar
3z2-r2-14.243
x2-y2-8.207
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.919 0.000 0.000
y 0.000 -2.403 0.000
z 0.000 0.000 15.790


<r2> (average value of r2) Å2
<r2> 125.208
(<r2>)1/2 11.190