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

using model chemistry: TPSSh/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 TPSSh/3-21G*
 hartrees
Energy at 0K-489.270445
Energy at 298.15K-489.271044
HF Energy-489.270445
Nuclear repulsion energy79.404917
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 TPSSh/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' 3716 3588 409.69      
2 A' 2135 2061 493.65      
3 A' 857 828 11.94      
4 A' 512 494 7.94      
5 A' 373 360 383.90      
6 A" 516 498 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 4053.6 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 3914.6 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 TPSSh/3-21G*
ABC
74.58475 0.19266 0.19217

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.082 1.692 0.000
C2 0.000 0.497 0.000
S3 0.012 -1.088 0.000
H4 0.387 2.581 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.19692.78101.0051
C21.19691.58542.1186
S32.78101.58543.6875
H41.00512.11863.6875

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 176.482 C2 N1 H4 148.238
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.730      
2 C 0.310      
3 S 0.045      
4 H 0.374      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.009 2.869 0.000 3.041
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.009 -0.100 0.000
y -0.100 8.247 0.000
z 0.000 0.000 1.921


<r2> (average value of r2) Å2
<r2> 61.244
(<r2>)1/2 7.826

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at TPSSh/3-21G*
 hartrees
Energy at 0K-489.269938
Energy at 298.15K 
HF Energy-489.269938
Nuclear repulsion energy79.418524
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 TPSSh/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 3827 3695 680.33      
2 Σ 2187 2112 485.61      
3 Σ 847 818 25.38      
4 Π 521 503 0.16      
4 Π 521 503 0.16      
5 Π 232i 224i 232.40      
5 Π 232i 224i 232.40      

Unscaled Zero Point Vibrational Energy (zpe) 3719.9 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 3592.3 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 TPSSh/3-21G*
B
0.19151

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

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 -0.499
S3 0.000 0.000 1.092
H4 0.000 0.000 -2.681

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18642.77750.9959
C21.18641.59112.1822
S32.77751.59113.7734
H40.99592.18223.7734

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
Charges from optimized geometry at TPSSh/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.775      
2 C 0.363      
3 S 0.023      
4 H 0.390      


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