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 H2NCHCHNH2 (diaminoethylene)

using model chemistry: HF/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at HF/CEP-31G*
 hartrees
Energy at 0K-33.780960
Energy at 298.15K 
HF Energy-33.780960
Nuclear repulsion energy66.544124
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 HF/CEP-31G*
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 3851 3458 1.18 97.61 0.73 0.85
2 A 3752 3369 3.98 196.89 0.04 0.07
3 A 3355 3012 0.03 126.63 0.44 0.61
4 A 1918 1722 0.19 67.68 0.17 0.30
5 A 1802 1618 36.78 11.87 0.72 0.84
6 A 1428 1283 0.08 17.81 0.26 0.42
7 A 1371 1231 0.05 25.03 0.68 0.81
8 A 1113 1000 0.65 14.31 0.38 0.55
9 A 1051 944 88.79 2.08 0.48 0.65
10 A 934 838 146.74 2.09 0.26 0.41
11 A 575 516 1.67 8.05 0.39 0.56
12 A 320 288 2.27 3.98 0.51 0.67
13 A 257 231 20.53 1.81 0.75 0.86
14 B 3851 3458 4.13 33.68 0.75 0.86
15 B 3751 3368 0.50 51.66 0.75 0.86
16 B 3356 3014 75.11 0.82 0.75 0.86
17 B 1817 1632 62.31 7.94 0.75 0.86
18 B 1494 1342 11.47 1.81 0.75 0.86
19 B 1226 1101 135.92 0.62 0.75 0.86
20 B 1208 1084 1.46 3.73 0.75 0.86
21 B 927 832 248.23 18.07 0.75 0.86
22 B 849 763 218.02 5.75 0.75 0.86
23 B 341 306 30.63 0.39 0.75 0.86
24 B 238 214 144.69 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 20391.6 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 18311.7 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 HF/CEP-31G*
ABC
1.42577 0.13070 0.12160

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.318 0.595 0.019
C2 -0.318 -0.595 0.019
N3 -0.318 1.868 -0.099
N4 0.318 -1.868 -0.099
H5 1.401 0.641 0.015
H6 -1.401 -0.641 0.015
H7 -1.320 1.785 -0.069
H8 1.320 -1.785 -0.069
H9 -0.028 2.488 0.637
H10 0.028 -2.488 0.637

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.34891.42822.46491.08322.11722.02692.58332.02153.1573
C21.34892.46491.42822.11721.08322.58332.02693.15732.0215
N31.42822.46493.78892.11452.73481.00504.00331.00554.4309
N42.46491.42823.78892.73482.11454.00331.00504.43091.0055
H51.08322.11722.11452.73483.08102.95212.42942.41603.4734
H62.11721.08322.73482.11453.08102.42942.95213.47342.4160
H72.02692.58331.00504.00332.95212.42944.43991.63134.5359
H82.58332.02694.00331.00502.42942.95214.43994.53591.6313
H92.02153.15731.00554.43092.41603.47341.63134.53594.9764
H103.15732.02154.43091.00553.47342.41604.53591.63134.9764

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.119 C1 C2 H6 120.644
C1 N3 H7 111.632 C1 N3 H9 111.133
C2 C1 N3 125.119 C2 C1 H5 120.644
C2 N4 H8 111.632 C2 N4 H10 111.133
N3 C1 H5 113.988 N4 C2 H6 113.988
H7 N3 H9 108.463 H8 N4 H10 108.463
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.244      
2 C -0.244      
3 N -0.567      
4 N -0.567      
5 H 0.214      
6 H 0.214      
7 H 0.296      
8 H 0.296      
9 H 0.301      
10 H 0.301      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 2.670 2.670
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.106 -1.841 0.000
y -1.841 -25.026 0.000
z 0.000 0.000 -28.373
Traceless
 xyz
x 6.593 -1.841 0.000
y -1.841 -0.786 0.000
z 0.000 0.000 -5.807
Polar
3z2-r2-11.614
x2-y24.920
xy-1.841
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.871 0.595 0.000
y 0.595 7.974 0.000
z 0.000 0.000 3.213


<r2> (average value of r2) Å2
<r2> 82.740
(<r2>)1/2 9.096