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: TPSSh/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes 1A'
Energy calculated at TPSSh/3-21G*
 hartrees
Energy at 0K-185.827767
Energy at 298.15K 
HF Energy-185.827767
Nuclear repulsion energy91.226673
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 TPSSh/3-21G*
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' 3205 3095 12.95 92.22 0.54 0.70
2 A' 3077 2972 17.02 91.63 0.15 0.27
3 A' 2226 2150 12.88 124.90 0.33 0.49
4 A' 1649 1593 20.53 20.82 0.26 0.41
5 A' 1534 1482 11.82 39.87 0.41 0.58
6 A' 1223 1181 4.59 5.44 0.73 0.84
7 A' 903 872 3.73 2.32 0.06 0.11
8 A' 609 588 2.64 3.06 0.45 0.62
9 A' 257 249 7.10 9.01 0.53 0.69
10 A" 1094 1056 33.35 0.09 0.75 0.86
11 A" 796 769 0.68 9.69 0.75 0.86
12 A" 401 387 5.51 1.13 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8487.8 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 8196.7 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 TPSSh/3-21G*
ABC
2.42537 0.17198 0.16059

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.110 -1.597 0.000
N2 -0.568 -0.497 0.000
C3 0.000 0.723 0.000
N4 0.365 1.844 0.000
H5 -0.442 -2.531 0.000
H6 1.201 -1.649 0.000

Atom - Atom Distances (Å)
  C1 N2 C3 N4 H5 H6
C11.29142.32223.44971.08561.0920
N21.29141.34612.52032.03772.1103
C32.32221.34611.17873.28422.6583
N43.44972.52031.17874.44883.5907
H51.08562.03773.28424.44881.8650
H61.09202.11032.65833.59071.8650

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 123.381 N2 C1 H5 117.766
N2 C1 H6 124.393 N2 C3 N4 173.106
H5 C1 H6 117.841
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.118      
2 N -0.512      
3 C 0.581      
4 N -0.432      
5 H 0.251      
6 H 0.230      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.769 -4.124 0.000 4.195
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.973 0.249 0.000
y 0.249 8.000 0.000
z 0.000 0.000 1.631


<r2> (average value of r2) Å2
<r2> 72.470
(<r2>)1/2 8.513