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 HNCS (Isothiocyanic acid)

using model chemistry: QCISD/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/aug-cc-pVDZ
 hartrees
Energy at 0K-490.882740
Energy at 298.15K-490.883496
HF Energy-490.427545
Nuclear repulsion energy78.749514
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/aug-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 A' 3674 3559 206.16      
2 A' 1994 1931 806.82      
3 A' 861 834 1.23      
4 A' 689 667 412.08      
5 A' 446 432 74.68      
6 A" 477 462 3.66      

Unscaled Zero Point Vibrational Energy (zpe) 4070.2 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 3942.8 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 QCISD/aug-cc-pVDZ
ABC
30.66365 0.19103 0.18985

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.165 1.713 0.000
C2 0.000 0.505 0.000
S3 0.038 -1.091 0.000
H4 0.551 2.431 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.22002.81161.0134
C21.22001.59592.0032
S32.81161.59593.5585
H41.01342.00323.5585

picture of Isothiocyanic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 S3 173.577 C2 N1 H4 127.264
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability