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

using model chemistry: HF/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-25.595735
Energy at 298.15K 
HF Energy-25.595735
Nuclear repulsion energy26.929920
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/CEP-121G
Rotational Constants (cm-1) from geometry optimized at HF/CEP-121G
See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at HF/CEP-121G
 hartrees
Energy at 0K-25.596027
Energy at 298.15K-25.596810
HF Energy-25.596027
Nuclear repulsion energy26.839905
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/CEP-121G
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 4084 3727 844.58      
2 Σ 2267 2068 825.96      
3 Σ 730 666 47.86      
4 Π 501 457 88.84      
4 Π 501 457 88.84      
5 Π 442 403 184.85      
5 Π 442 403 184.85      

Unscaled Zero Point Vibrational Energy (zpe) 4483.0 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 4090.7 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/CEP-121G
B
0.18381

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.709
C2 0.000 0.000 -0.543
S3 0.000 0.000 1.120
H4 0.000 0.000 -2.691

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.16572.82880.9823
C21.16571.66312.1480
S32.82881.66313.8111
H40.98232.14803.8111

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/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.122      
2 C -0.199      
3 S -0.132      
4 H 0.453      


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 -4.511 4.511
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.367 0.000 0.000
y 0.000 -25.367 0.000
z 0.000 0.000 -16.106
Traceless
 xyz
x -4.631 0.000 0.000
y 0.000 -4.631 0.000
z 0.000 0.000 9.261
Polar
3z2-r218.523
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 2.095 0.000 0.000
y 0.000 2.095 0.000
z 0.000 0.000 8.715


<r2> (average value of r2) Å2
<r2> 44.467
(<r2>)1/2 6.668