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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: PBEPBE/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 PBEPBE/cc-pVTZ
 hartrees
Energy at 0K-187.884130
Energy at 298.15K-187.887966
HF Energy-187.884130
Nuclear repulsion energy101.716364
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/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 3504 3480 13.48      
2 A 3429 3405 0.92      
3 A 2302 2286 0.29      
4 A 1598 1587 6.99      
5 A 1159 1151 0.02      
6 A 816 810 2.05      
7 A 512 508 121.52      
8 A 432 429 12.78      
9 A 392 390 8.35      
10 A 168 167 22.99      
11 B 3504 3479 12.74      
12 B 3433 3410 1.96      
13 B 1598 1587 16.00      
14 B 1366 1356 107.28      
15 B 1159 1151 0.03      
16 B 574 570 290.13      
17 B 393 390 13.92      
18 B 169 168 24.96      

Unscaled Zero Point Vibrational Energy (zpe) 13253.2 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 13161.7 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 PBEPBE/cc-pVTZ
ABC
5.17796 0.11907 0.11906

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.004 0.608 0.051
C2 -0.004 -0.608 0.051
N3 -0.004 1.959 -0.082
N4 0.004 -1.959 -0.082
H5 -0.344 2.476 0.724
H6 0.848 2.366 -0.460
H7 0.344 -2.476 0.724
H8 -0.848 -2.366 -0.460

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21651.35682.57022.01542.01583.17513.1355
C21.21652.57021.35683.17513.13552.01542.0158
N31.35682.57023.91711.01651.01684.52044.4223
N42.57021.35683.91714.52044.42231.01651.0168
H52.01543.17511.01654.52041.68414.99935.0099
H62.01583.13551.01684.42231.68415.00995.0262
H73.17512.01544.52041.01654.99935.00991.6841
H83.13552.01584.42231.01685.00995.02621.6841

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.346 C1 N3 H5 115.502
C1 N3 H6 115.519 C2 C1 N3 174.346
C2 N4 H7 115.502 C2 N4 H8 115.519
H5 N3 H6 111.843 H7 N4 H8 111.843
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.115      
2 C -0.115      
3 N -0.192      
4 N -0.192      
5 H 0.153      
6 H 0.154      
7 H 0.153      
8 H 0.154      


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 1.247 1.247
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.805 3.671 0.000
y 3.671 -13.399 0.000
z 0.000 0.000 -23.946
Traceless
 xyz
x -5.133 3.671 0.000
y 3.671 10.477 0.000
z 0.000 0.000 -5.344
Polar
3z2-r2-10.688
x2-y2-10.406
xy3.671
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.924 0.255 0.000
y 0.255 10.415 0.000
z 0.000 0.000 3.911


<r2> (average value of r2) Å2
<r2> 97.545
(<r2>)1/2 9.876