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: B2PLYP/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 B2PLYP/cc-pVTZ
 hartrees
Energy at 0K-189.207435
Energy at 298.15K 
HF Energy-188.960512
Nuclear repulsion energy117.696107
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 B2PLYP/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 3616 3469 1.79      
2 A 3520 3378 0.68      
3 A 3162 3034 0.02      
4 A 1751 1680 0.10      
5 A 1650 1583 19.95      
6 A 1343 1288 0.73      
7 A 1288 1236 0.01      
8 A 1040 998 0.69      
9 A 941 903 72.14      
10 A 816 783 123.83      
11 A 554 532 1.14      
12 A 328 314 1.77      
13 A 249 238 15.78      
14 B 3616 3469 4.48      
15 B 3519 3376 1.98      
16 B 3166 3037 44.63      
17 B 1658 1590 44.76      
18 B 1400 1343 9.00      
19 B 1176 1128 95.13      
20 B 1135 1089 1.04      
21 B 821 787 117.76      
22 B 753 722 291.75      
23 B 346 332 35.53      
24 B 251 241 93.83      

Unscaled Zero Point Vibrational Energy (zpe) 19048.6 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 18275.2 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 B2PLYP/cc-pVTZ
ABC
1.44727 0.13267 0.12336

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.313 0.590 0.035
C2 -0.313 -0.590 0.035
N3 -0.313 1.850 -0.110
N4 0.313 -1.850 -0.110
H5 1.396 0.631 0.038
H6 -1.396 -0.631 0.038
H7 -1.320 1.782 -0.056
H8 1.320 -1.782 -0.056
H9 0.006 2.517 0.579
H10 -0.006 -2.517 0.579

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.33521.41392.44361.08382.09992.02362.57852.02573.1699
C21.33522.44361.41392.09991.08382.57852.02363.16992.0257
N31.41392.44363.75162.10382.71071.01043.98221.01044.4310
N42.44361.41393.75162.71072.10383.98221.01044.43101.0104
H51.08382.09992.10382.71073.06362.95082.41642.40433.4881
H62.09991.08382.71072.10383.06362.41642.95083.48812.4043
H72.02362.57851.01043.98222.95082.41644.43531.64304.5400
H82.57852.02363.98221.01042.41642.95084.43534.54001.6430
H92.02573.16991.01044.43102.40433.48811.64304.54005.0337
H103.16992.02574.43101.01043.48812.40434.54001.64305.0337

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.440 C1 C2 H6 120.117
C1 N3 H7 112.094 C1 N3 H9 112.283
C2 C1 N3 125.440 C2 C1 H5 120.117
C2 N4 H8 112.094 C2 N4 H10 112.283
N3 C1 H5 114.109 N4 C2 H6 114.109
H7 N3 H9 108.786 H8 N4 H10 108.786
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.108      
2 C -0.108      
3 N -0.289      
4 N -0.289      
5 H 0.112      
6 H 0.112      
7 H 0.140      
8 H 0.140      
9 H 0.145      
10 H 0.145      


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 2.059 2.059
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.005 -1.500 0.000
y -1.500 -23.227 0.000
z 0.000 0.000 -28.335
Traceless
 xyz
x 4.776 -1.500 0.000
y -1.500 1.443 0.000
z 0.000 0.000 -6.219
Polar
3z2-r2-12.438
x2-y22.222
xy-1.500
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.751 0.082 0.000
y 0.082 9.086 0.000
z 0.000 0.000 4.021


<r2> (average value of r2) Å2
<r2> 97.777
(<r2>)1/2 9.888