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

using model chemistry: CCSD(T)/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 CCSD(T)/6-31G(2df,p)
 hartrees
Energy at 0K-691.915126
Energy at 298.15K-691.914508
HF Energy-691.448474
Nuclear repulsion energy60.943767
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 CCSD(T)/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 2133 2133        
2 Σ 292 292        
3 Π 75 75        
3 Π 75 75        

Unscaled Zero Point Vibrational Energy (zpe) 1287.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1287.6 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 CCSD(T)/6-31G(2df,p)
B
0.09903

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.306
C2 0.000 0.000 -1.274
N3 0.000 0.000 -2.453

Atom - Atom Distances (Å)
  K1 C2 N3
K12.58063.7597
C22.58061.1791
N33.75971.1791

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 CCSD(T)/6-31G(2df,p)
 hartrees
Energy at 0K-691.917215
Energy at 298.15K 
HF Energy-691.456376
Nuclear repulsion energy64.570337
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 CCSD(T)/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 2084 2084        
2 Σ 332 332        
3 Π 89i 89i        
3 Π 89i 89i        

Unscaled Zero Point Vibrational Energy (zpe) 1119.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1119.0 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 CCSD(T)/6-31G(2df,p)
B
0.11526

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.205
C2 0.000 0.000 -2.400
N3 0.000 0.000 -1.213

Atom - Atom Distances (Å)
  K1 C2 N3
K13.60472.4180
C23.60471.1867
N32.41801.1867

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 CCSD(T)/6-31G(2df,p)
 hartrees
Energy at 0K-691.924908
Energy at 298.15K-691.924832
HF Energy-691.459381
Nuclear repulsion energy68.986501
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 CCSD(T)/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' 2060 2060        
2 A' 313 313        
3 A' 190 190        

Unscaled Zero Point Vibrational Energy (zpe) 1281.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1281.6 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 CCSD(T)/6-31G(2df,p)
ABC
1.86644 0.16824 0.15433

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 1.029 0.000
C2 0.637 -1.564 0.000
N3 -0.546 -1.453 0.000

Atom - Atom Distances (Å)
  K1 C2 N3
K12.67032.5419
C22.67031.1879
N32.54191.1879

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 70.854 K1 N3 C2 82.947
C2 K1 N3 26.199
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability