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

using model chemistry: QCISD(T)=FULL/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 QCISD(T)=FULL/6-31G*
 hartrees
Energy at 0K-490.854207
Energy at 298.15K-490.854919
HF Energy-490.388404
Nuclear repulsion energy79.159027
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 QCISD(T)=FULL/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' 3678 3678        
2 A' 2040 2040        
3 A' 873 873        
4 A' 667 667        
5 A' 439 439        
6 A" 462 462        

Unscaled Zero Point Vibrational Energy (zpe) 4079.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4079.1 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 QCISD(T)=FULL/6-31G*
ABC
34.08458 0.19290 0.19181

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.185 1.700 0.000
C2 0.000 0.498 0.000
S3 0.051 -1.085 0.000
H4 0.473 2.468 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.21662.79481.0117
C21.21661.58312.0264
S32.79481.58313.5776
H41.01172.02643.5776

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 173.103 C2 N1 H4 130.613
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at QCISD(T)=FULL/6-31G*
 hartrees
Energy at 0K-490.849443
Energy at 298.15K 
HF Energy-490.387925
Nuclear repulsion energy79.228120
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 QCISD(T)=FULL/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 3904 3904        
2 Σ 2170 2170        
3 Σ 850 850        
4 Π 459 459        
4 Π 459 459        
5 Π 504i 504i        
5 Π 504i 504i        

Unscaled Zero Point Vibrational Energy (zpe) 3416.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3416.8 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 QCISD(T)=FULL/6-31G*
B
0.19057

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.689
C2 0.000 0.000 -0.501
S3 0.000 0.000 1.095
H4 0.000 0.000 -2.687

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18842.78420.9975
C21.18841.59582.1859
S32.78421.59583.7817
H40.99752.18593.7817

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