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 H2CNCN (cyanamide, methylene)

using model chemistry: QCISD/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes 1A'
Energy calculated at QCISD/Def2TZVPP
 hartrees
Energy at 0K-186.522077
Energy at 298.15K 
HF Energy-185.821507
Nuclear repulsion energy92.354488
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/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3234 3234 3.90      
2 A' 3114 3114 12.76      
3 A' 2313 2313 27.63      
4 A' 1711 1711 27.21      
5 A' 1518 1518 18.42      
6 A' 1249 1249 9.02      
7 A' 944 944 5.72      
8 A' 640 640 3.66      
9 A' 257 257 6.29      
10 A" 1113 1113 17.40      
11 A" 783 783 0.97      
12 A" 378 378 9.69      

Unscaled Zero Point Vibrational Energy (zpe) 8627.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8627.4 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 QCISD/Def2TZVPP
ABC
2.07864 0.18262 0.16787

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.083 -1.538 0.000
N2 -0.641 -0.487 0.000
C3 0.000 0.709 0.000
N4 0.462 1.772 0.000
H5 -0.420 -2.497 0.000
H6 1.171 -1.519 0.000

Atom - Atom Distances (Å)
  C1 N2 C3 N4 H5 H6
C11.27632.24903.33201.08281.0878
N21.27631.35722.51432.02192.0848
C32.24901.35721.15913.23362.5169
N43.33202.51431.15914.35933.3663
H51.08282.02193.23364.35931.8676
H61.08782.08482.51693.36631.8676

picture of cyanamide, methylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 117.259 N2 C1 H5 117.742
N2 C1 H6 123.543 N2 C3 N4 175.334
H5 C1 H6 118.716
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability