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: HF/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
1 2 no C*V 1Σ

Conformer 1 (CS)

Jump to S1C2
Energy calculated at HF/cc-pVTZ
 hartrees
Energy at 0K-490.464262
Energy at 298.15K-490.464952
HF Energy-490.464262
Nuclear repulsion energy80.528426
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 HF/cc-pVTZ
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' 3931 3578 459.05      
2 A' 2192 1995 1154.57      
3 A' 895 815 22.36      
4 A' 582 529 104.02      
5 A' 373 340 504.91      
6 A" 547 498 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 4260.2 cm-1
Scaled (by 0.9101) Zero Point Vibrational Energy (zpe) 3877.2 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 HF/cc-pVTZ
ABC
45.44618 0.19872 0.19786

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.089 1.670 0.000
C2 0.000 0.503 0.000
S3 0.006 -1.072 0.000
H4 0.523 2.447 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.17052.74450.9885
C21.17051.57582.0124
S32.74451.57583.5567
H40.98852.01243.5567

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 175.854 C2 N1 H4 137.372
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.185      
2 C 0.162      
3 S -0.229      
4 H 0.252      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.162 2.384 0.000 2.652
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.751 3.086 0.000
y 3.086 -19.106 0.000
z 0.000 0.000 -25.614
Traceless
 xyz
x -2.391 3.086 0.000
y 3.086 6.076 0.000
z 0.000 0.000 -3.685
Polar
3z2-r2-7.370
x2-y2-5.645
xy3.086
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.128 -0.062 0.000
y -0.062 8.785 0.000
z 0.000 0.000 3.042


<r2> (average value of r2) Å2
<r2> 60.232
(<r2>)1/2 7.761

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at HF/cc-pVTZ
 hartrees
Energy at 0K-490.463454
Energy at 298.15K 
HF Energy-490.463454
Nuclear repulsion energy80.430886
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 HF/cc-pVTZ
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 4081 3714 890.85      
2 Σ 2314 2106 1069.35      
3 Σ 856 779 75.34      
4 Π 541 493 0.52      
4 Π 541 493 0.52      
5 Π 208i 189i 175.90      
5 Π 208i 189i 175.90      

Unscaled Zero Point Vibrational Energy (zpe) 3958.8 cm-1
Scaled (by 0.9101) Zero Point Vibrational Energy (zpe) 3602.9 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 HF/cc-pVTZ
B
0.19605

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.659
C2 0.000 0.000 -0.510
S3 0.000 0.000 1.082
H4 0.000 0.000 -2.638

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.14902.74100.9787
C21.14901.59202.1277
S32.74101.59203.7196
H40.97872.12773.7196

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
Charges from optimized geometry at HF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.160      
2 C 0.166      
3 S -0.289      
4 H 0.283      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -3.738 3.738
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.607 0.000 0.000
y 0.000 -25.607 0.000
z 0.000 0.000 -15.939
Traceless
 xyz
x -4.834 0.000 0.000
y 0.000 -4.834 0.000
z 0.000 0.000 9.668
Polar
3z2-r219.336
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.029 0.000 0.000
y 0.000 3.029 0.000
z 0.000 0.000 8.504


<r2> (average value of r2) Å2
<r2> 60.495
(<r2>)1/2 7.778