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

using model chemistry: B3LYP/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 B3LYP/3-21G*
 hartrees
Energy at 0K-489.269843
Energy at 298.15K-489.270286
HF Energy-489.269843
Nuclear repulsion energy79.537709
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 B3LYP/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' 3780 3636 535.27      
2 A' 2180 2097 515.68      
3 A' 857 824 19.40      
4 A' 520 501 1.44      
5 A' 233 224 327.75      
6 A" 525 505 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 4047.3 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 3893.5 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 B3LYP/3-21G*
ABC
140.91771 0.19269 0.19243

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.047 1.686 0.000
C2 0.000 0.499 0.000
S3 0.002 -1.089 0.000
H4 0.301 2.621 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18742.77470.9984
C21.18741.58782.1434
S32.77471.58783.7220
H40.99842.14343.7220

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 177.779 C2 N1 H4 157.278
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.728      
2 C 0.343      
3 S 0.018      
4 H 0.367      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.770 3.195 0.000 3.286
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.756 2.033 0.000
y 2.033 -16.560 0.000
z 0.000 0.000 -25.013
Traceless
 xyz
x -3.970 2.033 0.000
y 2.033 8.325 0.000
z 0.000 0.000 -4.355
Polar
3z2-r2-8.710
x2-y2-8.196
xy2.033
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.950 -0.052 0.000
y -0.052 8.107 0.000
z 0.000 0.000 1.908


<r2> (average value of r2) Å2
<r2> 61.134
(<r2>)1/2 7.819

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at B3LYP/3-21G*
 hartrees
Energy at 0K-489.269742
Energy at 298.15K 
HF Energy-489.269742
Nuclear repulsion energy79.537464
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 B3LYP/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 3839 3693 689.44      
2 Σ 2206 2122 504.82      
3 Σ 850 818 28.35      
4 Π 528 508 0.26      
4 Π 528 508 0.26      
5 Π 147i 141i 229.90      
5 Π 147i 141i 229.90      

Unscaled Zero Point Vibrational Energy (zpe) 3829.3 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 3683.8 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 B3LYP/3-21G*
B
0.19205

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.682
C2 0.000 0.000 -0.500
S3 0.000 0.000 1.091
H4 0.000 0.000 -2.676

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.18222.77320.9936
C21.18221.59102.1758
S32.77321.59103.7668
H40.99362.17583.7668

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 B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.752      
2 C 0.372      
3 S 0.006      
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
  0.000 0.000 -3.546 3.546
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.000 0.000 0.000
y 0.000 -25.000 0.000
z 0.000 0.000 -15.605
Traceless
 xyz
x -4.698 0.000 0.000
y 0.000 -4.698 0.000
z 0.000 0.000 9.395
Polar
3z2-r218.790
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.905 0.000 0.000
y 0.000 1.905 0.000
z 0.000 0.000 7.988


<r2> (average value of r2) Å2
<r2> 61.171
(<r2>)1/2 7.821