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

using model chemistry: MP3=FULL/6-31G(2df,p)

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 MP3=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-691.907775
Energy at 298.15K-691.907178
HF Energy-691.450376
Nuclear repulsion energy61.281508
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 MP3=FULL/6-31G(2df,p)
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 2275 2275 1.38      
2 Σ 295 295 62.56      
3 Π 80 80 9.79      
3 Π 80 80 9.79      

Unscaled Zero Point Vibrational Energy (zpe) 1364.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1364.9 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 MP3=FULL/6-31G(2df,p)
B
0.09967

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.303
C2 0.000 0.000 -1.278
N3 0.000 0.000 -2.441

Atom - Atom Distances (Å)
  K1 C2 N3
K12.58053.7438
C22.58051.1634
N33.74381.1634

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 MP3=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-691.910211
Energy at 298.15K 
HF Energy-691.457862
Nuclear repulsion energy64.929685
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 MP3=FULL/6-31G(2df,p)
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 2211 2211 102.06      
2 Σ 335 335 78.78      
3 Π 85i 85i 1.31      
3 Π 85i 85i 1.31      

Unscaled Zero Point Vibrational Energy (zpe) 1187.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1187.8 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 MP3=FULL/6-31G(2df,p)
B
0.11616

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.201
C2 0.000 0.000 -2.386
N3 0.000 0.000 -1.214

Atom - Atom Distances (Å)
  K1 C2 N3
K13.58682.4152
C23.58681.1716
N32.41521.1716

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 MP3=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-691.917425
Energy at 298.15K-691.917342
HF Energy-691.461146
Nuclear repulsion energy69.268191
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 MP3=FULL/6-31G(2df,p)
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' 2197 2197 19.66      
2 A' 315 315 68.94      
3 A' 184 184 3.97      

Unscaled Zero Point Vibrational Energy (zpe) 1348.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1348.0 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 MP3=FULL/6-31G(2df,p)
ABC
1.92011 0.16813 0.15460

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 1.030 0.000
C2 0.628 -1.568 0.000
N3 -0.538 -1.450 0.000

Atom - Atom Distances (Å)
  K1 C2 N3
K12.67282.5374
C22.67281.1721
N32.53741.1721

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 70.619 K1 N3 C2 83.547
C2 K1 N3 25.834
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability