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

using model chemistry: QCISD(T)=FULL/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-491.090155
Energy at 298.15K-491.090903
HF Energy-490.462390
Nuclear repulsion energy79.657509
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/cc-pVTZ
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' 3714 3554        
2 A' 2031 1944        
3 A' 870 833        
4 A' 627 600        
5 A' 455 435        
6 A" 494 473        

Unscaled Zero Point Vibrational Energy (zpe) 4095.4 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 3918.9 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/cc-pVTZ
ABC
35.25283 0.19518 0.19411

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.151 1.693 0.000
C2 0.000 0.497 0.000
S3 0.034 -1.079 0.000
H4 0.516 2.440 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.20542.77811.0021
C21.20541.57642.0105
S32.77811.57643.5520
H41.00212.01053.5520

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 174.021 C2 N1 H4 131.001
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at QCISD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-491.086657
Energy at 298.15K 
HF Energy-490.461359
Nuclear repulsion energy79.684549
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/cc-pVTZ
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 3913 3744        
2 Σ 2147 2054        
3 Σ 848 811        
4 Π 489 468        
4 Π 489 468        
5 Π 418i 400i        
5 Π 418i 400i        

Unscaled Zero Point Vibrational Energy (zpe) 3524.5 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 3372.6 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/cc-pVTZ
B
0.19270

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.679
C2 0.000 0.000 -0.500
S3 0.000 0.000 1.089
H4 0.000 0.000 -2.668

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.17902.76850.9886
C21.17901.58952.1676
S32.76851.58953.7571
H40.98862.16763.7571

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