return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-491.612357
Energy at 298.15K-491.613103
HF Energy-491.612357
Nuclear repulsion energy79.758193
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 mPW1PW91/6-31G**
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' 3760 3578 264.50      
2 A' 2106 2004 691.14      
3 A' 896 852 4.19      
4 A' 639 608 352.72      
5 A' 455 433 86.27      
6 A" 488 464 0.57      

Unscaled Zero Point Vibrational Energy (zpe) 4171.6 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 3969.3 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 mPW1PW91/6-31G**
ABC
36.66332 0.19563 0.19459

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.147 1.689 0.000
C2 0.000 0.496 0.000
S3 0.033 -1.078 0.000
H4 0.508 2.451 0.000

Atom - Atom Distances (Å)
  N1 C2 S3 H4
N11.20292.77351.0041
C21.20291.57412.0198
S32.77351.57413.5606
H41.00412.01983.5606

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 174.159 C2 N1 H4 132.264
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.548      
2 C 0.277      
3 S -0.057      
4 H 0.328      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.217 1.961 0.000 2.308
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.106 3.163 0.000
y 3.163 -19.074 0.000
z 0.000 0.000 -24.928
Traceless
 xyz
x -2.105 3.163 0.000
y 3.163 5.443 0.000
z 0.000 0.000 -3.338
Polar
3z2-r2-6.676
x2-y2-5.032
xy3.163
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.480 -0.189 0.000
y -0.189 8.722 0.000
z 0.000 0.000 2.302


<r2> (average value of r2) Å2
<r2> 60.664
(<r2>)1/2 7.789