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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G
 hartrees
Energy at 0K-490.584081
Energy at 298.15K-490.584631
HF Energy-490.311153
Nuclear repulsion energy77.363526
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/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3793 3604 413.87      
2 A' 2027 1926 527.12      
3 A' 795 755 8.39      
4 A' 581 552 483.02      
5 A' 401 381 12.62      
6 A" 394 374 25.25      

Unscaled Zero Point Vibrational Energy (zpe) 3994.8 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 3795.4 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 MP2=FULL/6-31G
ABC
67.23728 0.18260 0.18210

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.213 1.723 0.000
C2 0.000 0.526 0.000
S3 0.082 -1.116 0.000
H4 0.179 2.648 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.21582.85471.0043
C21.21581.64442.1293
S32.85471.64443.7654
H41.00432.12933.7654

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 172.769 C2 N1 H4 146.955
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at MP2=FULL/6-31G
 hartrees
Energy at 0K-490.582238
Energy at 298.15K 
HF Energy-490.314686
Nuclear repulsion energy77.337416
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/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 3882 3689 690.92      
2 Σ 2074 1971 519.09      
3 Σ 767 728 41.30      
4 Π 380 361 18.70      
4 Π 380 361 18.70      
5 Π 477i 453i 226.22      
5 Π 477i 453i 226.22      

Unscaled Zero Point Vibrational Energy (zpe) 3264.7 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 3101.7 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/6-31G
B
0.18107

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.730
C2 0.000 0.000 -0.529
S3 0.000 0.000 1.125
H4 0.000 0.000 -2.727

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.20102.85480.9977
C21.20101.65392.1987
S32.85481.65393.8526
H40.99772.19873.8526

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