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 NH2CCNH2 (Diaminoacetylene)

using model chemistry: wB97X-D/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 wB97X-D/aug-cc-pVTZ
 hartrees
Energy at 0K-188.049205
Energy at 298.15K-188.053225
HF Energy-188.049205
Nuclear repulsion energy 
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 wB97X-D/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 3674 3514 31.29      
2 A 3583 3428 1.12      
3 A 2393 2289 0.21      
4 A 1658 1586 7.31      
5 A 1200 1148 0.31      
6 A 835 799 1.95      
7 A 519 497 117.43      
8 A 435 416 24.28      
9 A 406 388 14.96      
10 A 203 194 24.30      
11 B 3674 3514 30.65      
12 B 3585 3430 12.14      
13 B 1660 1588 35.92      
14 B 1381 1321 143.12      
15 B 1200 1148 0.32      
16 B 569 544 259.80      
17 B 440 421 32.74      
18 B 202 193 26.03      

Unscaled Zero Point Vibrational Energy (zpe) 13807.9 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 13208.6 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 wB97X-D/aug-cc-pVTZ
ABC
5.28122 0.12048 0.12047

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/aug-cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 0.600 0.048
C2 -0.002 -0.600 0.048
N3 -0.002 1.949 -0.079
N4 0.002 -1.949 -0.079
H5 -0.349 2.456 0.719
H6 0.841 2.350 -0.454
H7 0.349 -2.456 0.719
H8 -0.841 -2.350 -0.454

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20061.35422.55202.00472.00473.14863.1099
C21.20062.55201.35423.14863.10992.00472.0047
N31.35422.55203.89721.00711.00724.49044.3962
N42.55201.35423.89724.49044.39621.00711.0072
H52.00473.14861.00714.49041.67444.96214.9725
H62.00473.10991.00724.39621.67444.97254.9931
H73.14862.00474.49041.00714.96214.97251.6744
H83.10992.00474.39621.00724.97254.99311.6744

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.609 C1 N3 H5 115.414
C1 N3 H6 115.407 C2 C1 N3 174.609
C2 N4 H7 115.414 C2 N4 H8 115.407
H5 N3 H6 112.452 H7 N4 H8 112.452
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.205      
2 C 0.205      
3 N -0.457      
4 N -0.457      
5 H 0.125      
6 H 0.127      
7 H 0.125      
8 H 0.127      


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 1.278 1.278
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.876 3.772 0.000
y 3.772 -14.231 0.000
z 0.000 0.000 -23.997
Traceless
 xyz
x -4.762 3.772 0.000
y 3.772 9.705 0.000
z 0.000 0.000 -4.943
Polar
3z2-r2-9.886
x2-y2-9.644
xy3.772
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.841 0.110 0.000
y 0.110 10.200 0.000
z 0.000 0.000 4.837


<r2> (average value of r2) Å2
<r2> 96.696
(<r2>)1/2 9.833