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: CISD/cc-pVDZ

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 CISD/cc-pVDZ
 hartrees
Energy at 0K-4157.542456
Energy at 298.15K 
HF Energy-4157.388147
Nuclear repulsion energy209.745756
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 CISD/cc-pVDZ
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 214 198 21.12      

Unscaled Zero Point Vibrational Energy (zpe) 107.2 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 98.8 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 CISD/cc-pVDZ
B
0.07049

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Ga1 0.000 0.000 -1.331
As2 0.000 0.000 1.250

Atom - Atom Distances (Å)
  Ga1 As2
Ga12.5810
As22.5810

picture of Gallium arsenide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (1Σ)

Jump to S1C1
Energy calculated at CISD/cc-pVDZ
 hartrees
Energy at 0K-4157.492742
Energy at 298.15K 
HF Energy-4157.325149
Nuclear repulsion energy212.034289
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 CISD/cc-pVDZ
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 230 212 24.53      

Unscaled Zero Point Vibrational Energy (zpe) 115.1 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 106.1 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 CISD/cc-pVDZ
B
0.07204

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/cc-pVDZ

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 1.237

Atom - Atom Distances (Å)
  Ga1 As2
Ga12.5531
As22.5531

picture of Gallium arsenide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability