return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCSD(T)/6-31+G**

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)/6-31+G**
 hartrees
Energy at 0K-691.782898
Energy at 298.15K-691.782396
HF Energy-691.450941
Nuclear repulsion energy59.762240
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)/6-31+G**
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 2121 2035        
2 Σ 274 263        
3 Π 115 110        
3 Π 115 110        

Unscaled Zero Point Vibrational Energy (zpe) 1312.0 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 1259.0 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)/6-31+G**
B
0.09458

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.338
C2 0.000 0.000 -1.315
N3 0.000 0.000 -2.504

Atom - Atom Distances (Å)
  K1 C2 N3
K12.65313.8413
C22.65311.1882
N33.84131.1882

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)/6-31+G**
 hartrees
Energy at 0K-691.785984
Energy at 298.15K-691.785355
HF Energy-691.459169
Nuclear repulsion energy63.040519
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)/6-31+G**
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 2079 1995        
2 Σ 305 293        
3 Π 68 66        
3 Π 68 66        

Unscaled Zero Point Vibrational Energy (zpe) 1260.2 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 1209.3 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 CCSD(T)/6-31+G**
B
0.10900

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 0.000 1.241
C2 0.000 0.000 -2.457
N3 0.000 0.000 -1.262

Atom - Atom Distances (Å)
  K1 C2 N3
K13.69732.5023
C23.69731.1950
N32.50231.1950

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)/6-31+G**
 hartrees
Energy at 0K-691.788012
Energy at 298.15K-691.787865
HF Energy-691.457361
Nuclear repulsion energy67.290114
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)/6-31+G**
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' 2064 1980        
2 A' 292 280        
3 A' 162 155        

Unscaled Zero Point Vibrational Energy (zpe) 1258.5 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 1207.7 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)/6-31+G**
ABC
1.86613 0.15693 0.14476

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
K1 0.000 1.065 0.000
C2 0.637 -1.645 0.000
N3 -0.546 -1.481 0.000

Atom - Atom Distances (Å)
  K1 C2 N3
K12.78452.6042
C22.78451.1947
N32.60421.1947

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 68.866 K1 N3 C2 85.799
C2 K1 N3 25.335
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability