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

using model chemistry: MP4/6-31G*

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 MP4/6-31G*
 hartrees
Energy at 0K-490.840503
Energy at 298.15K-490.841218
HF Energy-490.386918
Nuclear repulsion energy78.867709
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 MP4/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3672 3506        
2 A' 1996 1906        
3 A' 865 826        
4 A' 701 670        
5 A' 435 416        
6 A" 451 431        

Unscaled Zero Point Vibrational Energy (zpe) 4060.8 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 3877.3 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 MP4/6-31G*
ABC
33.19013 0.19155 0.19046

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.217 1.704 0.000
C2 0.000 0.497 0.000
S3 0.068 -1.087 0.000
H4 0.431 2.482 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.22622.80561.0125
C21.22621.58572.0314
S32.80561.58573.5879
H41.01252.03143.5879

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 172.267 C2 N1 H4 130.056
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-490.834615
Energy at 298.15K 
HF Energy-490.386480
Nuclear repulsion energy79.011997
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 MP4/6-31G*
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 3900 3724        
2 Σ 2109 2013        
3 Σ 853 814        
4 Π 446 426        
4 Π 446 426        
5 Π 561i 536i        
5 Π 561i 536i        

Unscaled Zero Point Vibrational Energy (zpe) 3315.8 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 3166.0 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 MP4/6-31G*
B
0.18955

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.696
C2 0.000 0.000 -0.499
S3 0.000 0.000 1.097
H4 0.000 0.000 -2.693

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.19682.79290.9978
C21.19681.59612.1946
S32.79291.59613.7907
H40.99782.19463.7907

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