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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: MP2=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2=FULL/3-21G
 hartrees
Energy at 0K-147.371942
Energy at 298.15K-147.374262
HF Energy-147.051259
Nuclear repulsion energy59.417483
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 MP2=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 3579 3417 17.21      
2 A 1249 1192 0.66      
3 A 862 823 26.28      
4 A 702 671 140.49      
5 A 518 494 1.98      
6 B 3582 3420 147.85      
7 B 2249 2147 328.60      
8 B 842 804 678.63      
9 B 523 499 71.88      

Unscaled Zero Point Vibrational Energy (zpe) 7052.7 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 6733.9 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 MP2=FULL/3-21G
ABC
14.82067 0.33603 0.33593

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.040
N2 0.000 1.229 -0.079
N3 0.000 -1.229 -0.079
H4 0.579 1.887 0.436
H5 -0.579 -1.887 0.436

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23521.23522.01292.0129
N21.23522.45891.01623.2112
N31.23522.45893.21121.0162
H42.01291.01623.21123.9472
H52.01293.21121.01623.9472

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 126.496 C1 N3 H5 126.496
N2 C1 N3 168.887
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability