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

using model chemistry: MP3/6-31G*

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 MP3/6-31G*
 hartrees
Energy at 0K-490.806493
Energy at 298.15K-490.807198
HF Energy-490.390062
Nuclear repulsion energy79.721086
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 MP3/6-31G*
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' 3768 3537 285.34      
2 A' 2124 1994 842.18      
3 A' 907 851 7.32      
4 A' 606 569 445.11      
5 A' 444 417 150.68      
6 A" 476 447 1.16      

Unscaled Zero Point Vibrational Energy (zpe) 4162.4 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 3906.8 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 MP3/6-31G*
ABC
37.72945 0.19542 0.19442

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.161 1.688 0.000
C2 0.000 0.496 0.000
S3 0.041 -1.079 0.000
H4 0.473 2.468 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.20262.77361.0060
C21.20261.57502.0283
S32.77361.57503.5730
H41.00602.02833.5730

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 173.783 C2 N1 H4 133.181
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-490.803421
Energy at 298.15K 
HF Energy-490.389478
Nuclear repulsion energy79.709559
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 MP3/6-31G*
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 3967 3723 774.87      
2 Σ 2254 2115 795.56      
3 Σ 874 820 53.34      
4 Π 471 442 6.26      
4 Π 471 442 6.26      
5 Π 428i 402i 192.41      
5 Π 428i 402i 192.41      

Unscaled Zero Point Vibrational Energy (zpe) 3589.8 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 3369.4 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 MP3/6-31G*
B
0.19288

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.678
C2 0.000 0.000 -0.501
S3 0.000 0.000 1.089
H4 0.000 0.000 -2.671

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.17732.76650.9937
C21.17731.58922.1710
S32.76651.58923.7602
H40.99372.17103.7602

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