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All results from a given calculation for HCN (Hydrogen cyanide)

using model chemistry: mPW1PW91/cc-pCVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at mPW1PW91/cc-pCVTZ
 hartrees
Energy at 0K-93.429726
Energy at 298.15K-93.429866
HF Energy-93.429726
Nuclear repulsion energy24.079080
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/cc-pCVTZ
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 3461 3461 65.39      
2 Σ 2224 2224 1.40      
3 Π 775 775 35.58      
3 Π 775 775 35.58      

Unscaled Zero Point Vibrational Energy (zpe) 3617.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3617.4 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/cc-pCVTZ
B
1.50441

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/cc-pCVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.496
H2 0.000 0.000 -1.562
N3 0.000 0.000 0.648

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06651.1441
H21.06652.2106
N31.14412.2106

picture of Hydrogen cyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 N3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/cc-pCVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.058      
2 H 0.157      
3 N -0.099      


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 -2.994 2.994
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 1.639 0.000 0.000
y 0.000 1.639 0.000
z 0.000 0.000 3.132


<r2> (average value of r2) Å2
<r2> 13.690
(<r2>)1/2 3.700