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All results from a given calculation for HNCNH (diiminomethane)

using model chemistry: CCSD/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCSD/6-311+G(3df,2p)
 hartrees
Energy at 0K-148.515108
Energy at 298.15K-148.517545
HF Energy-147.957213
Nuclear repulsion energy60.196472
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 CCSD/6-311+G(3df,2p)
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 3643 3436 26.19      
2 A 1282 1209 0.00      
3 A 952 898 8.17      
4 A 771 727 88.26      
5 A 543 512 0.05      
6 B 3642 3435 141.50      
7 B 2216 2090 729.99      
8 B 946 892 461.87      
9 B 545 514 82.09      

Unscaled Zero Point Vibrational Energy (zpe) 7270.1 cm-1
Scaled (by 0.9431) Zero Point Vibrational Energy (zpe) 6856.4 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 CCSD/6-311+G(3df,2p)
ABC
12.09785 0.34772 0.34771

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-311+G(3df,2p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.014
N2 0.000 1.219 -0.080
N3 0.000 -1.219 -0.080
H4 0.630 1.735 0.518
H5 -0.630 -1.735 0.518

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5
C11.22261.22261.91331.9133
N21.22262.43801.01013.0789
N31.22262.43803.07891.0101
H41.91331.01013.07893.6915
H51.91333.07891.01013.6915

picture of diiminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H4 117.629 C1 N3 H5 117.629
N2 C1 N3 171.186
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability