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 MgSO4 (Magnesium Sulfate)

using model chemistry: QCISD/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/6-31G
 hartrees
Energy at 0K-896.785887
Energy at 298.15K-896.788393
HF Energy-896.146899
Nuclear repulsion energy347.265626
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 QCISD/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 A1 837 807 110.30      
2 A1 647 624 94.82      
3 A1 566 545 100.99      
4 A1 419 404 18.91      
5 A1 289 278 34.70      
6 A2 233 225 0.00      
7 B1 933 899 46.80      
8 B1 375 361 49.69      
9 B1 102 98 40.34      
10 B2 602 580 88.15      
11 B2 519 500 62.14      
12 B2 303 292 2.19      

Unscaled Zero Point Vibrational Energy (zpe) 2912.1 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 2806.1 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 QCISD/6-31G
ABC
0.13961 0.06847 0.06578

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Mg1 0.000 0.000 -2.013
S2 0.000 0.000 0.652
O3 0.000 1.315 -0.604
O4 0.000 -1.315 -0.604
O5 -1.430 0.000 1.462
O6 1.430 0.000 1.462

Atom - Atom Distances (Å)
  Mg1 S2 O3 O4 O5 O6
Mg12.66451.92701.92703.75813.7581
S22.66451.81861.81861.64391.6439
O31.92701.81862.63032.83672.8367
O41.92701.81862.63032.83672.8367
O53.75811.64392.83672.83672.8600
O63.75811.64392.83672.83672.8600

picture of Magnesium Sulfate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Mg1 O3 S2 90.645 Mg1 O4 S2 90.645
O3 Mg1 O4 86.076 O3 S2 O4 92.634
O3 S2 O5 109.918 O3 S2 O6 109.918
O4 S2 O5 109.918 O4 S2 O6 109.918
O5 S2 O6 120.890
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability