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 HNCNH (diiminomethane)

using model chemistry: MP2=FULL/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-148.382348
Energy at 298.15K-148.384699
HF Energy-147.906472
Nuclear repulsion energy59.624384
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/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 3684 3460 27.73      
2 A 1265 1188 0.01      
3 A 889 835 7.12      
4 A 733 688 115.66      
5 A 525 493 0.29      
6 B 3685 3460 167.18      
7 B 2222 2087 610.11      
8 B 877 824 507.34      
9 B 519 487 90.18      

Unscaled Zero Point Vibrational Energy (zpe) 7199.1 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 6761.4 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/6-31+G**
ABC
12.40614 0.34053 0.34029

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.036
N2 0.000 1.230 -0.086
N3 0.000 -1.230 -0.086
H4 0.615 1.782 0.496
H5 -0.615 -1.782 0.496

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23561.23561.94051.9405
N21.23562.45911.01143.1285
N31.23562.45913.12851.0114
H41.94051.01143.12853.7706
H51.94053.12851.01143.7706

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 119.108 C1 N3 H5 119.108
N2 C1 N3 168.610
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability