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All results from a given calculation for HNCS (Isothiocyanic acid)

using model chemistry: QCISD(TQ)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes C*V 1Σ

Conformer 1 (CS)

Jump to S1C2
Vibrational Frequencies calculated at QCISD(TQ)/6-31G*
Rotational Constants (cm-1) from geometry optimized at QCISD(TQ)/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)/6-31G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at QCISD(TQ)/6-31G*
 hartrees
Energy at 0K-490.828540
Energy at 298.15K 
HF Energy-490.388150
Nuclear repulsion energy79.249587
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(TQ)/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 3904 3904        
2 Σ 2184 2184        
3 Σ 850 850        
4 Π 453 453        
4 Π 453 453        
5 Π 502i 502i        
5 Π 502i 502i        

Unscaled Zero Point Vibrational Energy (zpe) 3420.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3420.1 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(TQ)/6-31G*
B
0.19066

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.689
C2 0.000 0.000 -0.502
S3 0.000 0.000 1.095
H4 0.000 0.000 -2.686

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18692.78330.9977
C21.18691.59642.1846
S32.78331.59643.7809
H40.99772.18463.7809

picture of Isothiocyanic acid state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 S3 180.000 C2 N1 H4 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability