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

using model chemistry: MP4=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 MP4=FULL/6-31G*
 hartrees
Energy at 0K-490.859320
Energy at 298.15K-490.860044
HF Energy-490.387213
Nuclear repulsion energy78.950495
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 MP4=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' 3676 3535        
2 A' 2004 1927        
3 A' 868 835        
4 A' 697 670        
5 A' 440 423        
6 A" 458 441        

Unscaled Zero Point Vibrational Energy (zpe) 4071.6 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 3915.2 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 MP4=FULL/6-31G*
ABC
33.60171 0.19193 0.19084

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.208 1.703 0.000
C2 0.000 0.496 0.000
S3 0.063 -1.086 0.000
H4 0.442 2.480 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.22472.80271.0121
C21.22471.58392.0321
S32.80271.58393.5862
H41.01212.03213.5862

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 172.529 C2 N1 H4 130.346
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at MP4=FULL/6-31G*
 hartrees
Energy at 0K-490.853719
Energy at 298.15K 
HF Energy-490.386704
Nuclear repulsion energy79.091704
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 MP4=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 3903 3753        
2 Σ 2115 2034        
3 Σ 856 823        
4 Π 454 437        
4 Π 454 437        
5 Π 547i 526i        
5 Π 547i 526i        

Unscaled Zero Point Vibrational Energy (zpe) 3344.5 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 3216.1 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 MP4=FULL/6-31G*
B
0.18994

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.694
C2 0.000 0.000 -0.498
S3 0.000 0.000 1.096
H4 0.000 0.000 -2.691

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.19572.79000.9975
C21.19571.59432.1933
S32.79001.59433.7875
H40.99752.19333.7875

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