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All results from a given calculation for NCN (Cyanoimidogen)

using model chemistry: QCISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 3Σg
2 1 yes D*H 1Σg

State 1 (3Σg)

Jump to S2C1
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-146.150606
Energy at 298.15K-146.150360
HF Energy-145.895129
Nuclear repulsion energy45.829942
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 QCISD/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 Σg 1170 1124 0.00      
2 Σu 1294 1244 182.29      
3 Πu 457 439 11.64      
3 Πu 457 439 11.64      

Unscaled Zero Point Vibrational Energy (zpe) 1689.2 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 1623.5 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 QCISD/3-21G*
B
0.38351

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
N2 0.000 0.000 1.253
N3 0.000 0.000 -1.253

Atom - Atom Distances (Å)
  C1 N2 N3
C11.25281.2528
N21.25282.5056
N31.25282.5056

picture of Cyanoimidogen state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N2 C1 N3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (1Σg)

Jump to S1C1
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-146.087329
Energy at 298.15K-146.087078
HF Energy-145.785517
Nuclear repulsion energy46.024275
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 QCISD/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 Σg 1193 1146 0.00      
2 Σu 1597 1535 154.92      
3 Πu 473 455 3.52      
3 Πu 420 404 26.78      

Unscaled Zero Point Vibrational Energy (zpe) 1841.3 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 1769.7 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 QCISD/3-21G*
B
0.38677

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
N2 0.000 0.000 1.248
N3 0.000 0.000 -1.248

Atom - Atom Distances (Å)
  C1 N2 N3
C11.24751.2475
N21.24752.4950
N31.24752.4950

picture of Cyanoimidogen state 2 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N2 C1 N3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability