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

using model chemistry: B3LYPultrafine/aug-cc-pVTZ

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 B3LYPultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-93.462750
Energy at 298.15K-93.462877
HF Energy-93.462750
Nuclear repulsion energy24.048136
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/aug-cc-pVTZ
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 3443 3331 65.81 26.83 0.24 0.38
2 Σ 2200 2128 1.53 64.57 0.07 0.13
3 Π 760 735 36.10 0.34 0.75 0.86
3 Π 760 735 36.10 0.34 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3581.3 cm-1
Scaled (by 0.9675) Zero Point Vibrational Energy (zpe) 3464.9 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/aug-cc-pVTZ
B
1.50053

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/aug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.497
H2 0.000 0.000 -1.563
N3 0.000 0.000 0.649

Atom - Atom Distances (Å)
  C1 H2 N3
C11.06561.1460
H21.06562.2117
N31.14602.2117

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 B3LYPultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.334      
2 H 0.613      
3 N -0.279      


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 -3.041 3.041
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.818 0.000 0.000
y 0.000 -11.818 0.000
z 0.000 0.000 -9.889
Traceless
 xyz
x -0.964 0.000 0.000
y 0.000 -0.964 0.000
z 0.000 0.000 1.929
Polar
3z2-r23.857
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 2.117 0.000 0.000
y 0.000 2.117 0.000
z 0.000 0.000 3.375


<r2> (average value of r2) Å2
<r2> 13.852
(<r2>)1/2 3.722