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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-490.820771
Energy at 298.15K-490.821507
HF Energy-490.388524
Nuclear repulsion energy79.473941
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
4/u)
Dep P Dep U
1 A' 3733 3517 287.77      
2 A' 2080 1960 593.05      
3 A' 906 854 2.47      
4 A' 645 608 451.91      
5 A' 457 430 69.75      
6 A" 474 447 5.19      

Unscaled Zero Point Vibrational Energy (zpe) 4147.8 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 3908.0 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 MP2=FULL/6-31G*
ABC
38.55971 0.19424 0.19326

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 -0.194 1.691 0.000
C2 0.000 0.491 0.000
S3 0.059 -1.080 0.000
H4 0.409 2.499 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.21492.78241.0085
C21.21491.57272.0488
S32.78241.57273.5962
H41.00852.04883.5962

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 172.962 C2 N1 H4 134.073
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-490.816768
Energy at 298.15K 
HF Energy-490.387437
Nuclear repulsion energy79.535704
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
4/u)
Dep P Dep U
1 Σ 3922 3695 735.60      
2 Σ 2169 2044 580.19      
3 Σ 888 836 32.39      
4 Π 468 441 9.54      
4 Π 468 441 9.54      
5 Π 508i 479i 182.75      
5 Π 508i 479i 182.75      

Unscaled Zero Point Vibrational Energy (zpe) 3448.9 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 3249.5 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/6-31G*
B
0.19216

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 -1.685
C2 0.000 0.000 -0.493
S3 0.000 0.000 1.089
H4 0.000 0.000 -2.681

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.19152.77400.9962
C21.19151.58252.1877
S32.77401.58253.7702
H40.99622.18773.7702

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