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

using model chemistry: HF/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
Energy calculated at HF/6-31G
 hartrees
Energy at 0K-490.317216
Energy at 298.15K 
HF Energy-490.317216
Nuclear repulsion energy78.920157
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/6-31G
Rotational Constants (cm-1) from geometry optimized at HF/6-31G
See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at HF/6-31G
 hartrees
Energy at 0K-490.318931
Energy at 298.15K-490.319606
HF Energy-490.318931
Nuclear repulsion energy78.419558
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/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 4133 3732 868.03      
2 Σ 2319 2094 713.23      
3 Σ 731 660 52.08      
4 Π 477 431 50.44      
4 Π 477 431 50.44      
5 Π 413 373 251.64      
5 Π 413 373 251.64      

Unscaled Zero Point Vibrational Energy (zpe) 4481.7 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 4046.5 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/6-31G
B
0.18562

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.700
C2 0.000 0.000 -0.541
S3 0.000 0.000 1.114
H4 0.000 0.000 -2.679

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.15892.81460.9786
C21.15891.65572.1375
S32.81461.65573.7933
H40.97862.13753.7933

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/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.704      
2 C 0.216      
3 S 0.027      
4 H 0.461      


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 -4.503 4.503
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.981 0.000 0.000
y 0.000 -25.981 0.000
z 0.000 0.000 -17.068
Traceless
 xyz
x -4.457 0.000 0.000
y 0.000 -4.457 0.000
z 0.000 0.000 8.913
Polar
3z2-r217.827
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 1.862 0.000 0.000
y 0.000 1.862 0.000
z 0.000 0.000 8.228


<r2> (average value of r2) Å2
<r2> 63.412
(<r2>)1/2 7.963