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: B3PW91/6-31G*

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 B3PW91/6-31G*
 hartrees
Energy at 0K-4156.580703
Energy at 298.15K 
HF Energy-4156.580703
Nuclear repulsion energy215.623735
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 B3PW91/6-31G*
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 222 212 24.30      

Unscaled Zero Point Vibrational Energy (zpe) 110.8 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 106.0 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 B3PW91/6-31G*
B
0.07450

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Ga1 0.000 0.000 -1.295
As2 0.000 0.000 1.216

Atom - Atom Distances (Å)
  Ga1 As2
Ga12.5106
As22.5106

picture of Gallium arsenide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Ga 0.115      
2 As -0.115      


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 -0.831 0.831
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.794 0.000 0.000
y 0.000 -32.794 0.000
z 0.000 0.000 -40.813
Traceless
 xyz
x 4.010 0.000 0.000
y 0.000 4.010 0.000
z 0.000 0.000 -8.020
Polar
3z2-r2-16.039
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 9.057 0.000 0.000
y 0.000 9.057 0.000
z 0.000 0.000 15.350


<r2> (average value of r2) Å2
<r2> 122.905
(<r2>)1/2 11.086

State 2 (1Σ)

Jump to S1C1
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-4156.535038
Energy at 298.15K 
HF Energy-4156.535038
Nuclear repulsion energy216.114844
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 B3PW91/6-31G*
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 229 219 22.84      

Unscaled Zero Point Vibrational Energy (zpe) 114.4 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 109.5 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 B3PW91/6-31G*
B
0.07484

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Ga1 0.000 0.000 -1.292
As2 0.000 0.000 1.213

Atom - Atom Distances (Å)
  Ga1 As2
Ga12.5049
As22.5049

picture of Gallium arsenide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Ga 0.059      
2 As -0.059      


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 -0.387 0.387
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.315 0.000 0.000
y 0.000 -29.010 0.000
z 0.000 0.000 -40.446
Traceless
 xyz
x -2.587 0.000 0.000
y 0.000 9.871 0.000
z 0.000 0.000 -7.284
Polar
3z2-r2-14.568
x2-y2-8.305
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.409 0.000 0.000
y 0.000 2.531 0.000
z 0.000 0.000 15.700


<r2> (average value of r2) Å2
<r2> 122.524
(<r2>)1/2 11.069