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: CCSD/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 CCSD/6-31G(2df,p)
 hartrees
Energy at 0K-186.441766
Energy at 298.15K 
HF Energy-185.767565
Nuclear repulsion energy92.229362
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/6-31G(2df,p)
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' 3258 3080 3.81      
2 A' 3140 2969 8.74      
3 A' 2343 2216 20.16      
4 A' 1723 1629 26.99      
5 A' 1519 1436 13.53      
6 A' 1250 1182 8.36      
7 A' 946 895 5.09      
8 A' 640 605 4.87      
9 A' 256 242 6.26      
10 A" 1114 1053 17.13      
11 A" 790 747 1.19      
12 A" 384 363 10.91      

Unscaled Zero Point Vibrational Energy (zpe) 8681.1 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 8208.0 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 CCSD/6-31G(2df,p)
ABC
2.07729 0.18208 0.16741

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.083 -1.540 0.000
N2 -0.641 -0.487 0.000
C3 0.000 0.709 0.000
N4 0.462 1.775 0.000
H5 -0.422 -2.501 0.000
H6 1.173 -1.527 0.000

Atom - Atom Distances (Å)
  C1 N2 C3 N4 H5 H6
C11.27782.25143.33711.08541.0897
N21.27781.35762.51702.02562.0903
C32.25141.35761.16153.23822.5251
N43.33712.51701.16154.36673.3775
H51.08542.02563.23824.36671.8686
H61.08972.09032.52513.37751.8686

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 117.328 N2 C1 H5 117.774
N2 C1 H6 123.793 N2 C3 N4 175.279
H5 C1 H6 118.433
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability