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

using model chemistry: B3LYPultrafine/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes C*V 1Σ

Conformer 1 (CS)

Jump to S1C2
Energy calculated at B3LYPultrafine/3-21G
 hartrees
Energy at 0K-489.158293
Energy at 298.15K 
HF Energy-489.158293
Nuclear repulsion energy78.342666
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 B3LYPultrafine/3-21G
Rotational Constants (cm-1) from geometry optimized at B3LYPultrafine/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/3-21G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1
Energy calculated at B3LYPultrafine/3-21G
 hartrees
Energy at 0K-489.158293
Energy at 298.15K-489.158385
HF Energy-489.158293
Nuclear repulsion energy78.350585
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 B3LYPultrafine/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 3832 3697 698.79      
2 Σ 2213 2135 452.41      
3 Σ 788 760 23.60      
4 Π 536 517 2.16      
4 Π 536 517 2.16      
5 Π 140 135 222.89      
5 Π 140 135 222.89      

Unscaled Zero Point Vibrational Energy (zpe) 4091.9 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 3948.3 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 B3LYPultrafine/3-21G
B
0.18587

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.704
C2 0.000 0.000 -0.526
S3 0.000 0.000 1.111
H4 0.000 0.000 -2.698

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.17852.81560.9942
C21.17851.63702.1727
S32.81561.63703.8098
H40.99422.17273.8098

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 B3LYPultrafine/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.755      
2 C 0.169      
3 S 0.208      
4 H 0.378      


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 -4.025 4.025
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.199 0.000 0.000
y 0.000 -25.199 0.000
z 0.000 0.000 -15.988
Traceless
 xyz
x -4.605 0.000 0.000
y 0.000 -4.605 0.000
z 0.000 0.000 9.211
Polar
3z2-r218.422
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 1.675 0.000 0.000
y 0.000 1.675 0.000
z 0.000 0.000 7.990


<r2> (average value of r2) Å2
<r2> 62.853
(<r2>)1/2 7.928