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

using model chemistry: HSEh1PBE/3-21G*

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
Energy calculated at HSEh1PBE/3-21G*
 hartrees
Energy at 0K-489.029531
Energy at 298.15K 
HF Energy-489.029531
Nuclear repulsion energy79.747221
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 HSEh1PBE/3-21G*
Rotational Constants (cm-1) from geometry optimized at HSEh1PBE/3-21G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at HSEh1PBE/3-21G*
 hartrees
Energy at 0K-489.029536
Energy at 298.15K-489.029395
HF Energy-489.029536
Nuclear repulsion energy79.775409
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 HSEh1PBE/3-21G*
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 3873 3717 726.74      
2 Σ 2234 2144 519.40      
3 Σ 870 835 29.59      
4 Π 536 514 0.78      
4 Π 536 514 0.78      
5 Π 68 65 238.54      
5 Π 68 65 238.54      

Unscaled Zero Point Vibrational Energy (zpe) 4091.3 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 3927.2 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 HSEh1PBE/3-21G*
B
0.19324

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.678
C2 0.000 0.000 -0.497
S3 0.000 0.000 1.087
H4 0.000 0.000 -2.670

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18062.76480.9926
C21.18061.58432.1731
S32.76481.58433.7574
H40.99262.17313.7574

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 HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.788      
2 C 0.376      
3 S 0.018      
4 H 0.395      


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 -3.531 3.531
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.073 0.000 0.000
y 0.000 -25.073 0.000
z 0.000 0.000 -15.529
Traceless
 xyz
x -4.772 0.000 0.000
y 0.000 -4.772 0.000
z 0.000 0.000 9.544
Polar
3z2-r219.088
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 1.913 0.000 0.000
y 0.000 1.913 0.000
z 0.000 0.000 7.974


<r2> (average value of r2) Å2
<r2> 60.898
(<r2>)1/2 7.804