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

using model chemistry: B2PLYP=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 B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-688.931568
Energy at 298.15K-688.931028
HF Energy-688.855335
Nuclear repulsion energy60.439187
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 B2PLYP=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 2075 1976 6.87      
2 Σ 280 266 44.10      
3 Π 102 97 19.48      
3 Π 102 97 19.48      

Unscaled Zero Point Vibrational Energy (zpe) 1278.9 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 1217.5 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 B2PLYP=FULL/3-21G
B
0.09732

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.318
C2 0.000 0.000 -1.287
N3 0.000 0.000 -2.474

Atom - Atom Distances (Å)
  K1 C2 N3
K12.60453.7920
C22.60451.1875
N33.79201.1875

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 B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-688.932619
Energy at 298.15K 
HF Energy-688.859662
Nuclear repulsion energy63.729659
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 B2PLYP=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 2045 1946 51.10      
2 Σ 310 295 49.51      
3 Π 46i 44i 3.20      
3 Π 46i 44i 3.20      

Unscaled Zero Point Vibrational Energy (zpe) 1131.3 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 1077.0 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 B2PLYP=FULL/3-21G
B
0.11190

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.223
C2 0.000 0.000 -2.431
N3 0.000 0.000 -1.237

Atom - Atom Distances (Å)
  K1 C2 N3
K13.65442.4607
C23.65441.1936
N32.46071.1936

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 B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-688.937330
Energy at 298.15K-688.937182
HF Energy-688.861325
Nuclear repulsion energy67.412613
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 B2PLYP=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' 1986 1891 6.78      
2 A' 294 280 44.91      
3 A' 159 151 4.97      

Unscaled Zero Point Vibrational Energy (zpe) 1219.5 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 1161.0 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 B2PLYP=FULL/3-21G
ABC
1.85125 0.15823 0.14577

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 1.061 0.000
C2 0.640 -1.634 0.000
N3 -0.548 -1.479 0.000

Atom - Atom Distances (Å)
  K1 C2 N3
K12.77012.5985
C22.77011.1981
N32.59851.1981

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 69.205 K1 N3 C2 85.262
C2 K1 N3 25.533
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability