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

using model chemistry: MP4/6-31G*

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 MP4/6-31G*
 hartrees
Energy at 0K-691.771206
Energy at 298.15K-691.770624
HF Energy-691.439013
Nuclear repulsion energy60.088085
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 MP4/6-31G*
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 2045 1953        
2 Σ 290 277        
3 Π 88 84        
3 Π 88 84        

Unscaled Zero Point Vibrational Energy (zpe) 1255.1 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 1198.4 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 MP4/6-31G*
B
0.09615

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.326
C2 0.000 0.000 -1.295
N3 0.000 0.000 -2.489

Atom - Atom Distances (Å)
  K1 C2 N3
K12.62123.8145
C22.62121.1933
N33.81451.1933

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 MP4/6-31G*
 hartrees
Energy at 0K-691.771021
Energy at 298.15K 
HF Energy-691.444875
Nuclear repulsion energy63.439194
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 MP4/6-31G*
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 1995 1905        
2 Σ 324 309        
3 Π 71i 67i        
3 Π 71i 67i        

Unscaled Zero Point Vibrational Energy (zpe) 1089.0 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 1039.8 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 MP4/6-31G*
B
0.11097

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.228
C2 0.000 0.000 -2.442
N3 0.000 0.000 -1.241

Atom - Atom Distances (Å)
  K1 C2 N3
K13.67052.4694
C23.67051.2012
N32.46941.2012

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 MP4/6-31G*
 hartrees
Energy at 0K-691.779078
Energy at 298.15K-691.779001
HF Energy-691.447463
Nuclear repulsion energy67.865825
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 MP4/6-31G*
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' 1965 1876        
2 A' 308 294        
3 A' 198 189        

Unscaled Zero Point Vibrational Energy (zpe) 1235.3 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 1179.4 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 MP4/6-31G*
ABC
1.81478 0.16237 0.14903

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 1.048 0.000
C2 0.646 -1.579 0.000
N3 -0.553 -1.491 0.000

Atom - Atom Distances (Å)
  K1 C2 N3
K12.70482.5988
C22.70481.2024
N32.59881.2024

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 72.019 K1 N3 C2 81.872
C2 K1 N3 26.109
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability