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All results from a given calculation for KCN (Potassium cyanide)

using model chemistry: PBE1PBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 3 yes CS 1A'

Conformer 1 (C*V)

Jump to S1C2 S1C3
Vibrational Frequencies calculated at PBE1PBE/3-21G
Rotational Constants (cm-1) from geometry optimized at PBE1PBE/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1 S1C3
Vibrational Frequencies calculated at PBE1PBE/3-21G
Rotational Constants (cm-1) from geometry optimized at PBE1PBE/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (CS)

Jump to S1C1 S1C2
Energy calculated at PBE1PBE/3-21G
 hartrees
Energy at 0K-688.967646
Energy at 298.15K-688.967477
HF Energy-688.967646
Nuclear repulsion energy68.180554
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 PBE1PBE/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' 2080 1997 20.63      
2 A' 329 316 44.23      
3 A' 121 116 8.55      

Unscaled Zero Point Vibrational Energy (zpe) 1264.5 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 1214.4 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 PBE1PBE/3-21G
ABC
1.98281 0.16049 0.14847

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 1.051 0.000
C2 0.620 -1.699 0.000
N3 -0.531 -1.396 0.000

Atom - Atom Distances (Å)
  K1 C2 N3
K12.81932.5045
C22.81931.1897
N32.50451.1897

picture of Potassium cyanide state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
K1 C2 N3 62.558 K1 N3 C2 92.507
C2 K1 N3 24.935
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 K 0.505      
2 C -0.014      
3 N -0.491      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.319 10.301 0.000 10.306
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.968 1.304 0.000
y 1.304 -25.839 0.000
z 0.000 0.000 -23.794
Traceless
 xyz
x -3.151 1.304 0.000
y 1.304 0.042 0.000
z 0.000 0.000 3.109
Polar
3z2-r26.219
x2-y2-2.128
xy1.304
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.189 -0.281 0.000
y -0.281 3.846 -0.000
z 0.000 -0.000 3.106


<r2> (average value of r2) Å2
<r2> 72.400
(<r2>)1/2 8.509