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: QCISD(T)=FULL/cc-pVTZ

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(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-148.588895
Energy at 298.15K-148.591305
HF Energy-147.956792
Nuclear repulsion energy60.074020
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(T)=FULL/cc-pVTZ
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 3617 3461        
2 A 1263 1208        
3 A 942 901        
4 A 755 722        
5 A 532 509        
6 B 3617 3461        
7 B 2212 2116        
8 B 933 893        
9 B 531 508        

Unscaled Zero Point Vibrational Energy (zpe) 7200.2 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 6889.9 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 QCISD(T)=FULL/cc-pVTZ
ABC
12.09594 0.34616 0.34610

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.018
N2 0.000 1.222 -0.082
N3 0.000 -1.222 -0.082
H4 0.628 1.739 0.516
H5 -0.628 -1.739 0.516

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.22591.22591.91441.9144
N21.22592.44371.00913.0848
N31.22592.44373.08481.0091
H41.91441.00913.08483.6973
H51.91443.08481.00913.6973

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 117.535 C1 N3 H5 117.535
N2 C1 N3 170.658
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability