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: PBEPBE/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at PBEPBE/aug-cc-pVDZ
 hartrees
Energy at 0K-187.841494
Energy at 298.15K-187.845056
HF Energy-187.841494
Nuclear repulsion energy101.197859
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 PBEPBE/aug-cc-pVDZ
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 3509 3488 17.58      
2 A 3424 3403 0.31      
3 A 2305 2291 0.03      
4 A 1579 1569 6.17      
5 A 1139 1132 0.06      
6 A 815 810 0.95      
7 A 464 461 128.07      
8 A 427 424 2.60      
9 A 364 361 10.59      
10 A 128 128 19.63      
11 B 3509 3487 17.09      
12 B 3428 3407 0.87      
13 B 1580 1571 17.41      
14 B 1369 1361 119.18      
15 B 1138 1132 0.30      
16 B 525 522 256.54      
17 B 361 358 14.52      
18 B 127 126 20.88      

Unscaled Zero Point Vibrational Energy (zpe) 13095.0 cm-1
Scaled (by 0.9939) Zero Point Vibrational Energy (zpe) 13015.1 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 PBEPBE/aug-cc-pVDZ
ABC
5.15866 0.11780 0.11778

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.614 0.035
C2 -0.007 -0.614 0.035
N3 -0.007 1.971 -0.072
N4 0.007 -1.971 -0.072
H5 -0.350 2.476 0.746
H6 0.841 2.395 -0.452
H7 0.350 -2.476 0.746
H8 -0.841 -2.395 -0.452

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22881.36142.58802.02492.02553.19003.1639
C21.22882.58801.36143.19003.16392.02492.0255
N31.36142.58803.94291.02061.02084.53654.4614
N42.58801.36143.94294.53654.46141.02061.0208
H52.02493.19001.02064.53651.69095.00215.0402
H62.02553.16391.02084.46141.69095.04025.0764
H73.19002.02494.53651.02065.00215.04021.6909
H83.16392.02554.46141.02085.04025.07641.6909

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.346 C1 N3 H5 115.705
C1 N3 H6 115.742 C2 C1 N3 175.346
C2 N4 H7 115.705 C2 N4 H8 115.742
H5 N3 H6 111.848 H7 N4 H8 111.848
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.111      
2 C 0.111      
3 N -0.045      
4 N -0.045      
5 H -0.047      
6 H -0.019      
7 H -0.047      
8 H -0.019      


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 1.271 1.271
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.158 3.934 0.000
y 3.934 -14.521 0.000
z 0.000 0.000 -24.429
Traceless
 xyz
x -4.683 3.934 0.000
y 3.934 9.772 0.000
z 0.000 0.000 -5.089
Polar
3z2-r2-10.178
x2-y2-9.637
xy3.934
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.032 0.481 0.000
y 0.481 11.594 0.000
z 0.000 0.000 4.995


<r2> (average value of r2) Å2
<r2> 98.888
(<r2>)1/2 9.944