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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: QCISD/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-148.372084
Energy at 298.15K-148.374477
HF Energy-147.901317
Nuclear repulsion energy59.712297
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/6-31G**
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 3671 3456 18.12      
2 A 1274 1200 0.01      
3 A 973 916 6.67      
4 A 802 755 101.25      
5 A 509 479 0.05      
6 B 3672 3457 80.10      
7 B 2228 2097 514.65      
8 B 968 911 474.08      
9 B 506 476 71.53      

Unscaled Zero Point Vibrational Energy (zpe) 7301.1 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 6873.3 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 QCISD/6-31G**
ABC
11.85084 0.34195 0.34190

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.021
N2 0.000 1.230 -0.083
N3 0.000 -1.230 -0.083
H4 0.638 1.739 0.516
H5 -0.638 -1.739 0.516

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.23461.23461.91751.9175
N21.23462.46051.01193.0956
N31.23462.46053.09561.0119
H41.91751.01193.09563.7049
H51.91753.09561.01193.7049

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 116.862 C1 N3 H5 116.862
N2 C1 N3 170.421
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability