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: mPW1PW91/6-31G

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 mPW1PW91/6-31G
 hartrees
Energy at 0K-4156.600748
Energy at 298.15K 
HF Energy-4156.600748
Nuclear repulsion energy210.904553
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 mPW1PW91/6-31G
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 210 199 20.29 1109.30 0.21 0.35

Unscaled Zero Point Vibrational Energy (zpe) 105.2 cm-1
Scaled (by 0.9466) Zero Point Vibrational Energy (zpe) 99.6 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 mPW1PW91/6-31G
B
0.07127

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Ga1 0.000 0.000 -1.324
As2 0.000 0.000 1.243

Atom - Atom Distances (Å)
  Ga1 As2
Ga12.5668
As22.5668

picture of Gallium arsenide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Ga 0.282      
2 As -0.282      


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 -1.664 1.664
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.092 0.000 0.000
y 0.000 -33.092 0.000
z 0.000 0.000 -43.172
Traceless
 xyz
x 5.040 0.000 0.000
y 0.000 5.040 0.000
z 0.000 0.000 -10.080
Polar
3z2-r2-20.159
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 9.481 0.000 0.000
y 0.000 9.481 0.000
z 0.000 0.000 15.721


<r2> (average value of r2) Å2
<r2> 128.079
(<r2>)1/2 11.317

State 2 (1Σ)

Jump to S1C1
Energy calculated at mPW1PW91/6-31G
 hartrees
Energy at 0K-4156.554759
Energy at 298.15K 
HF Energy-4156.554759
Nuclear repulsion energy212.070307
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 mPW1PW91/6-31G
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 219 207 20.51 5827.17 0.37 0.54

Unscaled Zero Point Vibrational Energy (zpe) 109.4 cm-1
Scaled (by 0.9466) Zero Point Vibrational Energy (zpe) 103.6 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 mPW1PW91/6-31G
B
0.07206

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Ga1 0.000 0.000 -1.316
As2 0.000 0.000 1.236

Atom - Atom Distances (Å)
  Ga1 As2
Ga12.5527
As22.5527

picture of Gallium arsenide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Ga 0.228      
2 As -0.228      


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 -1.091 1.091
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.942 0.000 0.000
y 0.000 -29.042 0.000
z 0.000 0.000 -42.812
Traceless
 xyz
x -2.015 0.000 0.000
y 0.000 11.334 0.000
z 0.000 0.000 -9.320
Polar
3z2-r2-18.639
x2-y2-8.899
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.660 0.000 0.000
y 0.000 -3.812 0.000
z 0.000 0.000 16.198


<r2> (average value of r2) Å2
<r2> 127.016
(<r2>)1/2 11.270