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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-488.918617
Energy at 298.15K 
HF Energy-488.918617
Nuclear repulsion energy78.612631
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-488.918624
Energy at 298.15K-488.918953
HF Energy-488.918624
Nuclear repulsion energy78.588059
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 3865 3723 736.75      
2 Σ 2242 2159 463.33      
3 Σ 808 778 24.74      
4 Π 544 524 4.06      
4 Π 544 524 4.06      
5 Π 211 203 230.10      
5 Π 211 203 230.10      

Unscaled Zero Point Vibrational Energy (zpe) 4211.6 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 4057.0 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
0.18706

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 -1.699
C2 0.000 0.000 -0.522
S3 0.000 0.000 1.108
H4 0.000 0.000 -2.692

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.17672.80680.9932
C21.17671.63012.1700
S32.80681.63013.8001
H40.99322.17003.8001

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 -0.790      
2 C 0.166      
3 S 0.225      
4 H 0.399      


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 -4.035 4.035
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.286 0.000 0.000
y 0.000 -25.286 0.000
z 0.000 0.000 -15.941
Traceless
 xyz
x -4.672 0.000 0.000
y 0.000 -4.672 0.000
z 0.000 0.000 9.345
Polar
3z2-r218.689
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 1.684 0.000 0.000
y 0.000 1.684 0.000
z 0.000 0.000 7.972


<r2> (average value of r2) Å2
<r2> 62.575
(<r2>)1/2 7.910