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

using model chemistry: CISD/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 CISD/6-31G
 hartrees
Energy at 0K-490.558339
Energy at 298.15K-490.558683
HF Energy-490.316184
Nuclear repulsion energy77.577624
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 CISD/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' 3921 3677 611.47      
2 A' 2161 2027 625.52      
3 A' 746 700 31.81      
4 A' 406 381 5.02      
5 A' 342 321 374.99      
6 A" 403 378 12.25      

Unscaled Zero Point Vibrational Energy (zpe) 3989.9 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 3741.8 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 CISD/6-31G
ABC
182.01730 0.18245 0.18226

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.113 1.720 0.000
C2 0.000 0.538 0.000
S3 0.041 -1.122 0.000
H4 0.137 2.682 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18772.84560.9947
C21.18771.65962.1493
S32.84561.65963.8053
H40.99472.14933.8053

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 175.937 C2 N1 H4 159.944
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at CISD/6-31G
 hartrees
Energy at 0K-490.558126
Energy at 298.15K 
HF Energy-490.317387
Nuclear repulsion energy77.540929
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 CISD/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 3950 3705 721.22      
2 Σ 2185 2049 602.26      
3 Σ 733 687 46.84      
4 Π 398 373 10.82      
4 Π 398 373 10.82      
5 Π 264i 248i 248.32      
5 Π 264i 248i 248.32      

Unscaled Zero Point Vibrational Energy (zpe) 3567.3 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 3345.4 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 CISD/6-31G
B
0.18174

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.722
C2 0.000 0.000 -0.539
S3 0.000 0.000 1.125
H4 0.000 0.000 -2.714

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18252.84660.9927
C21.18251.66412.1752
S32.84661.66413.8392
H40.99272.17523.8392

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