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

using model chemistry: CCD/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 CCD/cc-pVTZ
 hartrees
Energy at 0K-490.988215
Energy at 298.15K-490.988949
HF Energy-490.463225
Nuclear repulsion energy79.935372
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 CCD/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' 3754 3506 294.90      
2 A' 2081 1943 874.47      
3 A' 891 832 7.33      
4 A' 592 553 319.14      
5 A' 447 418 229.40      
6 A" 503 470 1.55      

Unscaled Zero Point Vibrational Energy (zpe) 4134.4 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 3860.3 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 CCD/cc-pVTZ
ABC
36.99351 0.19644 0.19540

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.138 1.686 0.000
C2 0.000 0.497 0.000
S3 0.028 -1.077 0.000
H4 0.520 2.440 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.19622.76711.0006
C21.19621.57422.0110
S32.76711.57423.5509
H41.00062.01103.5509

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 174.404 C2 N1 H4 132.328
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at CCD/cc-pVTZ
 hartrees
Energy at 0K-490.985602
Energy at 298.15K 
HF Energy-490.462255
Nuclear repulsion energy79.897165
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 CCD/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 3935 3674 763.76      
2 Σ 2201 2055 842.17      
3 Σ 859 802 51.58      
4 Π 499 466 6.02      
4 Π 499 466 6.02      
5 Π 384i 358i 147.91      
5 Π 384i 358i 147.91      

Unscaled Zero Point Vibrational Energy (zpe) 3612.5 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 3373.0 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 CCD/cc-pVTZ
B
0.19371

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.673
C2 0.000 0.000 -0.502
S3 0.000 0.000 1.087
H4 0.000 0.000 -2.662

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.17122.76020.9881
C21.17121.58902.1593
S32.76021.58903.7483
H40.98812.15933.7483

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