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

using model chemistry: MP2/6-311+G(3df,2p)

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 MP2/6-311+G(3df,2p)
 hartrees
Energy at 0K-692.078597
Energy at 298.15K-692.077986
HF Energy-691.509280
Nuclear repulsion energy60.563167
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 MP2/6-311+G(3df,2p)
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 2033 1918 8.84      
2 Σ 278 262 67.82      
3 Π 82 77 8.62      
3 Π 82 77 8.62      

Unscaled Zero Point Vibrational Energy (zpe) 1237.4 cm-1
Scaled (by 0.9434) Zero Point Vibrational Energy (zpe) 1167.3 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 MP2/6-311+G(3df,2p)
B
0.09760

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+G(3df,2p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.316
C2 0.000 0.000 -1.287
N3 0.000 0.000 -2.469

Atom - Atom Distances (Å)
  K1 C2 N3
K12.60303.7855
C22.60301.1825
N33.78551.1825

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 MP2/6-311+G(3df,2p)
 hartrees
Energy at 0K-692.079295
Energy at 298.15K 
HF Energy-691.517308
Nuclear repulsion energy64.030892
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 MP2/6-311+G(3df,2p)
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 2026 1911 58.89      
2 Σ 307 290 82.55      
3 Π 51i 48i 0.82      
3 Π 51i 48i 0.82      

Unscaled Zero Point Vibrational Energy (zpe) 1115.5 cm-1
Scaled (by 0.9434) Zero Point Vibrational Energy (zpe) 1052.3 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 MP2/6-311+G(3df,2p)
B
0.11290

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+G(3df,2p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.218
C2 0.000 0.000 -2.419
N3 0.000 0.000 -1.233

Atom - Atom Distances (Å)
  K1 C2 N3
K13.63752.4508
C23.63751.1867
N32.45081.1867

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 MP2/6-311+G(3df,2p)
 hartrees
Energy at 0K-692.084535
Energy at 298.15K-692.084406
HF Energy-691.517401
Nuclear repulsion energy68.299626
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 MP2/6-311+G(3df,2p)
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' 1989 1876 7.02      
2 A' 294 278 71.75      
3 A' 169 160 6.71      

Unscaled Zero Point Vibrational Energy (zpe) 1225.8 cm-1
Scaled (by 0.9434) Zero Point Vibrational Energy (zpe) 1156.4 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 MP2/6-311+G(3df,2p)
ABC
1.87545 0.16327 0.15019

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 1.045 0.000
C2 0.635 -1.602 0.000
N3 -0.545 -1.462 0.000

Atom - Atom Distances (Å)
  K1 C2 N3
K12.72222.5650
C22.72221.1885
N32.56501.1885

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 69.711 K1 N3 C2 84.528
C2 K1 N3 25.760
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability