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/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes 1A'
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-186.443716
Energy at 298.15K 
HF Energy-185.767285
Nuclear repulsion energy92.175355
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(2df,p)
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' 3254 3082 4.04      
2 A' 3136 2971 9.32      
3 A' 2328 2205 22.81      
4 A' 1714 1624 29.67      
5 A' 1516 1436 14.55      
6 A' 1248 1182 8.34      
7 A' 944 894 5.19      
8 A' 639 605 4.91      
9 A' 256 242 6.31      
10 A" 1112 1054 16.72      
11 A" 787 746 1.25      
12 A" 383 363 11.00      

Unscaled Zero Point Vibrational Energy (zpe) 8657.4 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 8202.0 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(2df,p)
ABC
2.07389 0.18190 0.16724

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.083 -1.541 0.000
N2 -0.641 -0.487 0.000
C3 0.000 0.709 0.000
N4 0.463 1.776 0.000
H5 -0.422 -2.502 0.000
H6 1.173 -1.528 0.000

Atom - Atom Distances (Å)
  C1 N2 C3 N4 H5 H6
C11.27892.25203.33891.08571.0901
N21.27891.35762.51832.02682.0917
C32.25201.35761.16293.23912.5263
N43.33892.51831.16294.36883.3797
H51.08572.02683.23914.36881.8691
H61.09012.09172.52633.37971.8691

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 117.312 N2 C1 H5 117.767
N2 C1 H6 123.814 N2 C3 N4 175.269
H5 C1 H6 118.419
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability