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 H2SeO4 (Selenic acid)

using model chemistry: CCSD/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCSD/TZVP
 hartrees
Energy at 0K-2701.461410
Energy at 298.15K-2701.463864
HF Energy-2700.412054
Nuclear repulsion energy456.126766
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 CCSD/TZVP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3826 3652 42.89      
2 A 1130 1079 69.53      
3 A 969 925 67.65      
4 A 709 676 74.62      
5 A 369 352 93.35      
6 A 331 316 6.27      
7 A 275 262 0.83      
8 A 185 177 91.22      
9 B 3823 3649 207.60      
10 B 1165 1112 109.36      
11 B 1050 1002 100.98      
12 B 723 690 155.28      
13 B 368 351 83.10      
14 B 343 327 38.84      
15 B 271 259 58.31      

Unscaled Zero Point Vibrational Energy (zpe) 7768.1 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 7413.9 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 CCSD/TZVP
ABC
0.14286 0.13570 0.13113

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Se1 0.000 0.000 0.134
O2 0.000 1.423 0.835
O3 0.000 -1.423 0.835
O4 1.335 0.016 -0.977
O5 -1.335 -0.016 -0.977
H6 1.588 -0.904 -1.141
H7 -1.588 0.904 -1.141

Atom - Atom Distances (Å)
  Se1 O2 O3 O4 O5 H6 H7
Se11.58681.58681.73701.73702.22802.2280
O21.58682.84662.65512.67193.44172.5878
O31.58682.84662.67192.65512.58783.4417
O41.73702.65512.67192.67040.96803.0591
O51.73702.67192.65512.67043.05910.9680
H62.22803.44172.58780.96803.05913.6540
H72.22802.58783.44173.05910.96803.6540

picture of Selenic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Se1 O4 H6 107.470 Se1 O5 H7 107.470
O2 Se1 O3 127.519 O2 Se1 O4 105.945
O2 Se1 O5 106.913 O3 Se1 O4 106.913
O3 Se1 O5 105.945 O4 Se1 O5 100.468
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability