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

using model chemistry: MP2=FULL/3-21G

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 MP2=FULL/3-21G
 hartrees
Energy at 0K-488.196157
Energy at 298.15K-488.196673
HF Energy-487.923566
Nuclear repulsion energy77.644196
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 MP2=FULL/3-21G
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' 3752 3583 545.73      
2 A' 2093 1998 441.90      
3 A' 788 752 19.01      
4 A' 482 460 3.45      
5 A' 355 339 388.31      
6 A" 485 463 0.96      

Unscaled Zero Point Vibrational Energy (zpe) 3977.3 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 3797.5 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 MP2=FULL/3-21G
ABC
114.96917 0.18321 0.18292

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.070 1.724 0.000
C2 0.000 0.529 0.000
S3 0.012 -1.119 0.000
H4 0.305 2.654 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.19692.84411.0021
C21.19691.64822.1459
S32.84411.64823.7837
H41.00212.14593.7837

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 177.049 C2 N1 H4 154.673
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at MP2=FULL/3-21G
 hartrees
Energy at 0K-488.195836
Energy at 298.15K 
HF Energy-487.926337
Nuclear repulsion energy77.596158
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 MP2=FULL/3-21G
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 3803 3632 721.95      
2 Σ 2117 2022 419.58      
3 Σ 773 738 39.48      
4 Π 487 465 1.23      
4 Π 487 465 1.23      
5 Π 247i 236i 218.22      
5 Π 247i 236i 218.22      

Unscaled Zero Point Vibrational Energy (zpe) 3587.3 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 3425.1 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 MP2=FULL/3-21G
B
0.18222

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

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 -0.531
S3 0.000 0.000 1.122
H4 0.000 0.000 -2.719

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.19012.84410.9977
C21.19011.65402.1878
S32.84411.65403.8418
H40.99772.18783.8418

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