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

using model chemistry: MP4=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no C*V 1Σ
1 2 no C*V 1Σ
1 3 yes CS 1A'

Conformer 1 (C*V)

Jump to S1C2 S1C3
Energy calculated at MP4=FULL/3-21G
 hartrees
Energy at 0K-688.172246
Energy at 298.15K-688.171679
HF Energy-687.946598
Nuclear repulsion energy59.527302
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 MP4=FULL/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 1951 1910        
2 Σ 273 267        
3 Π 96 94        
3 Π 96 94        

Unscaled Zero Point Vibrational Energy (zpe) 1208.1 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 1182.5 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 MP4=FULL/3-21G
B
0.09422

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.340
C2 0.000 0.000 -1.311
N3 0.000 0.000 -2.512

Atom - Atom Distances (Å)
  K1 C2 N3
K12.65063.8520
C22.65061.2014
N33.85201.2014

picture of Potassium cyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
K1 C2 N3 180.000 K1 N3 C2 0.000
C2 K1 N3 0.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C*V)

Jump to S1C1 S1C3
Energy calculated at MP4=FULL/3-21G
 hartrees
Energy at 0K-688.173723
Energy at 298.15K 
HF Energy-687.954162
Nuclear repulsion energy62.907752
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 MP4=FULL/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 1895 1854        
2 Σ 303 297        
3 Π 56i 54i        
3 Π 56i 54i        

Unscaled Zero Point Vibrational Energy (zpe) 1043.3 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 1021.2 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 MP4=FULL/3-21G
B
0.10904

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.239
C2 0.000 0.000 -2.463
N3 0.000 0.000 -1.253

Atom - Atom Distances (Å)
  K1 C2 N3
K13.70202.4925
C23.70201.2095
N32.49251.2095

picture of Potassium cyanide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
K1 C2 N3 0.000 K1 N3 C2 180.000
C2 K1 N3 0.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (CS)

Jump to S1C1 S1C2
Energy calculated at MP4=FULL/3-21G
 hartrees
Energy at 0K-688.178824
Energy at 298.15K-688.178678
HF Energy-687.952476
Nuclear repulsion energy66.639991
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 MP4=FULL/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' 1832 1793        
2 A' 290 284        
3 A' 164 161        

Unscaled Zero Point Vibrational Energy (zpe) 1143.0 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 1118.8 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 MP4=FULL/3-21G
ABC
1.80231 0.15487 0.14262

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 1.072 0.000
C2 0.648 -1.653 0.000
N3 -0.556 -1.494 0.000

Atom - Atom Distances (Å)
  K1 C2 N3
K12.80162.6256
C22.80161.2146
N32.62561.2146

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 69.078 K1 N3 C2 85.322
C2 K1 N3 25.600
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability