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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: wB97X-D/TZVP

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/TZVP
 hartrees
Energy at 0K-188.042022
Energy at 298.15K-188.045953
HF Energy-188.042022
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/TZVP
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 3692 3526 30.55      
2 A 3597 3435 2.43      
3 A 2397 2289 0.47      
4 A 1664 1589 8.56      
5 A 1197 1143 0.22      
6 A 841 803 1.18      
7 A 472 451 91.93      
8 A 435 416 20.35      
9 A 417 398 97.57      
10 A 199 190 28.26      
11 B 3692 3526 29.52      
12 B 3600 3438 17.43      
13 B 1667 1592 48.62      
14 B 1396 1333 141.47      
15 B 1197 1143 0.24      
16 B 507 484 262.96      
17 B 435 415 81.86      
18 B 198 189 31.09      

Unscaled Zero Point Vibrational Energy (zpe) 13801.5 cm-1
Scaled (by 0.955) Zero Point Vibrational Energy (zpe) 13180.4 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/TZVP
ABC
5.33936 0.12046 0.12046

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 0.601 0.045
C2 -0.002 -0.601 0.045
N3 -0.002 1.950 -0.076
N4 0.002 -1.950 -0.076
H5 -0.355 2.459 0.720
H6 0.836 2.357 -0.460
H7 0.355 -2.459 0.720
H8 -0.836 -2.357 -0.460

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20251.35392.55382.00842.00793.15343.1158
C21.20252.55381.35393.15343.11582.00842.0079
N31.35392.55383.89941.00801.00824.49414.4032
N42.55381.35393.89944.49414.40321.00801.0082
H52.00843.15341.00804.49411.67934.96884.9814
H62.00793.11581.00824.40321.67934.98145.0013
H73.15342.00844.49411.00804.96884.98141.6793
H83.11582.00794.40321.00824.98145.00131.6793

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.862 C1 N3 H5 115.726
C1 N3 H6 115.666 C2 C1 N3 174.862
C2 N4 H7 115.726 C2 N4 H8 115.666
H5 N3 H6 112.795 H7 N4 H8 112.795
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.147      
2 C -0.147      
3 N -0.347      
4 N -0.347      
5 H 0.246      
6 H 0.248      
7 H 0.246      
8 H 0.248      


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 1.298 1.298
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.810 3.718 0.000
y 3.718 -13.248 0.000
z 0.000 0.000 -23.929
Traceless
 xyz
x -5.222 3.718 0.000
y 3.718 10.622 0.000
z 0.000 0.000 -5.400
Polar
3z2-r2-10.800
x2-y2-10.563
xy3.718
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.499 0.115 0.000
y 0.115 9.461 0.000
z 0.000 0.000 3.492


<r2> (average value of r2) Å2
<r2> 96.554
(<r2>)1/2 9.826