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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: wB97X-D/6-31G*

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/6-31G*
 hartrees
Energy at 0K-187.962752
Energy at 298.15K-187.966802
HF Energy-187.962752
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/6-31G*
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 3672 3483 18.17      
2 A 3579 3394 3.56      
3 A 2420 2296 0.20      
4 A 1694 1606 12.06      
5 A 1222 1159 0.18      
6 A 844 800 2.54      
7 A 577 547 173.08      
8 A 425 403 5.75      
9 A 415 394 25.68      
10 A 202 192 20.74      
11 B 3672 3483 17.67      
12 B 3581 3397 8.53      
13 B 1695 1608 36.46      
14 B 1401 1329 104.37      
15 B 1222 1159 0.25      
16 B 631 598 393.26      
17 B 424 402 24.52      
18 B 203 193 21.24      

Unscaled Zero Point Vibrational Energy (zpe) 13939.1 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 13221.3 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/6-31G*
ABC
5.17989 0.11929 0.11928

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.606 0.028
C2 -0.005 -0.606 0.028
N3 -0.005 1.961 -0.069
N4 0.005 -1.961 -0.069
H5 -0.342 2.450 0.750
H6 0.844 2.373 -0.435
H7 0.342 -2.450 0.750
H8 -0.844 -2.373 -0.435

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21131.35852.56812.01072.01023.15773.1316
C21.21132.56811.35853.15773.13162.01072.0102
N31.35852.56813.92121.01191.01214.49944.4290
N42.56811.35853.92124.49944.42901.01191.0121
H52.01073.15771.01194.49941.67814.94744.9917
H62.01023.13161.01214.42901.67814.99175.0368
H73.15772.01074.49941.01194.94744.99171.6781
H83.13162.01024.42901.01214.99175.03681.6781

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.789 C1 N3 H5 115.270
C1 N3 H6 115.211 C2 C1 N3 175.789
C2 N4 H7 115.270 C2 N4 H8 115.211
H5 N3 H6 112.009 H7 N4 H8 112.009
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.172      
2 C 0.172      
3 N -0.872      
4 N -0.872      
5 H 0.349      
6 H 0.351      
7 H 0.349      
8 H 0.351      


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 1.668 1.668
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.999 4.559 0.000
y 4.559 -13.371 0.000
z 0.000 0.000 -23.129
Traceless
 xyz
x -4.749 4.559 0.000
y 4.559 9.693 0.000
z 0.000 0.000 -4.944
Polar
3z2-r2-9.888
x2-y2-9.628
xy4.559
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.647 0.234 0.000
y 0.234 8.671 0.000
z 0.000 0.000 2.645


<r2> (average value of r2) Å2
<r2> 96.922
(<r2>)1/2 9.845