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: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G4
 hartrees
Energy at 0K-491.477909
Energy at 298.15K-491.473447
HF Energy-491.648498
Nuclear repulsion energy79.810555
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 B3LYP/6-31G(2df,p)
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' 3699 3569 239.49      
2 A' 2075 2002 646.71      
3 A' 878 848 3.03      
4 A' 648 626 334.84      
5 A' 468 451 91.68      
6 A" 502 485 1.55      

Unscaled Zero Point Vibrational Energy (zpe) 4134.9 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 3990.2 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 B3LYP/6-31G(2df,p)
ABC
36.52821 0.19593 0.19488

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.152 1.688 0.000
C2 0.000 0.495 0.000
S3 0.035 -1.077 0.000
H4 0.501 2.452 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.20252.77131.0050
C21.20251.57262.0198
S32.77131.57263.5595
H41.00502.01983.5595

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 176.081 C2 N1 H4 132.229
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.494      
2 C 0.395      
3 S -0.213      
4 H 0.311      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.084 1.830 0.000 2.127
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 60.597
(<r2>)1/2 7.784