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: B3PW91/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B3PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-189.305225
Energy at 298.15K 
HF Energy-189.305225
Nuclear repulsion energy117.868396
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 B3PW91/aug-cc-pVTZ
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 3623 3497 2.20      
2 A 3529 3406 0.15      
3 A 3142 3032 0.05      
4 A 1755 1694 0.51      
5 A 1638 1581 17.50      
6 A 1332 1286 0.45      
7 A 1280 1236 0.01      
8 A 1030 994 0.17      
9 A 932 900 68.09      
10 A 767 740 136.41      
11 A 552 533 2.29      
12 A 329 318 4.23      
13 A 240 232 14.93      
14 B 3622 3496 9.65      
15 B 3527 3404 3.87      
16 B 3146 3037 43.85      
17 B 1644 1587 52.81      
18 B 1389 1340 9.87      
19 B 1180 1138 133.13      
20 B 1119 1080 1.42      
21 B 817 788 50.13      
22 B 711 686 301.52      
23 B 343 331 33.49      
24 B 246 237 94.47      

Unscaled Zero Point Vibrational Energy (zpe) 18948.0 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 18286.7 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 B3PW91/aug-cc-pVTZ
ABC
1.45786 0.13314 0.12368

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/aug-cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.311 0.590 0.036
C2 -0.311 -0.590 0.036
N3 -0.311 1.844 -0.107
N4 0.311 -1.844 -0.107
H5 1.397 0.633 0.037
H6 -1.397 -0.633 0.037
H7 -1.319 1.796 -0.047
H8 1.319 -1.796 -0.047
H9 0.032 2.534 0.546
H10 -0.032 -2.534 0.546

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.33361.40752.43771.08652.10062.02932.59062.02993.1841
C21.33362.43771.40752.10061.08652.59062.02933.18412.0299
N31.40752.43773.74002.09912.70791.01033.98831.01044.4355
N42.43771.40753.74002.70792.09913.98831.01034.43551.0104
H51.08652.10062.09912.70793.06722.95552.43092.39553.5118
H62.10061.08652.70792.09913.06722.43092.95553.51182.3955
H72.02932.59061.01033.98832.95552.43094.45571.65014.5558
H82.59062.02933.98831.01032.43092.95554.45574.55581.6501
H92.02993.18411.01044.43552.39553.51181.65014.55585.0694
H103.18412.02994.43551.01043.51182.39554.55581.65015.0694

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.553 C1 C2 H6 120.101
C1 N3 H7 113.110 C1 N3 H9 113.157
C2 C1 N3 125.553 C2 C1 H5 120.101
C2 N4 H8 113.110 C2 N4 H10 113.157
N3 C1 H5 114.009 N4 C2 H6 114.009
H7 N3 H9 109.491 H8 N4 H10 109.491
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.125      
2 C -0.125      
3 N -0.394      
4 N -0.394      
5 H 0.406      
6 H 0.406      
7 H 0.070      
8 H 0.070      
9 H 0.043      
10 H 0.043      


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 1.969 1.969
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.880 -1.324 0.000
y -1.324 -22.963 0.000
z 0.000 0.000 -28.695
Traceless
 xyz
x 4.949 -1.324 0.000
y -1.324 1.825 0.000
z 0.000 0.000 -6.774
Polar
3z2-r2-13.547
x2-y22.083
xy-1.324
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.298 -0.025 0.000
y -0.025 10.172 0.000
z 0.000 0.000 5.244


<r2> (average value of r2) Å2
<r2> 97.651
(<r2>)1/2 9.882