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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: mPW1PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at mPW1PW91/6-31+G**
 hartrees
Energy at 0K-188.005362
Energy at 298.15K-188.009259
HF Energy-188.005362
Nuclear repulsion energy102.069113
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 mPW1PW91/6-31+G**
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 3698 3520 37.50      
2 A 3598 3424 1.63      
3 A 2387 2272 0.35      
4 A 1661 1581 8.53      
5 A 1188 1131 0.31      
6 A 848 807 1.01      
7 A 474 451 158.30      
8 A 444 422 2.28      
9 A 417 397 48.21      
10 A 190 181 28.99      
11 B 3698 3520 36.30      
12 B 3601 3427 14.95      
13 B 1665 1585 44.87      
14 B 1412 1344 143.25      
15 B 1188 1131 0.35      
16 B 519 494 304.58      
17 B 421 401 33.99      
18 B 190 181 30.10      

Unscaled Zero Point Vibrational Energy (zpe) 13798.5 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 13133.4 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 mPW1PW91/6-31+G**
ABC
5.32890 0.11961 0.11960

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.004 0.607 0.038
C2 -0.004 -0.607 0.038
N3 -0.004 1.957 -0.072
N4 0.004 -1.957 -0.072
H5 -0.352 2.462 0.731
H6 0.834 2.372 -0.455
H7 0.352 -2.462 0.731
H8 -0.834 -2.372 -0.455

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21361.35522.56662.01212.01193.16523.1335
C21.21362.56661.35523.16523.13352.01212.0119
N31.35522.56663.91481.01021.01054.50604.4247
N42.56661.35523.91484.50604.42471.01021.0105
H52.01213.16521.01024.50601.67964.97455.0006
H62.01193.13351.01054.42471.67965.00065.0286
H73.16522.01214.50601.01024.97455.00061.6796
H83.13352.01194.42471.01055.00065.02861.6796

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.247 C1 N3 H5 115.795
C1 N3 H6 115.758 C2 C1 N3 175.247
C2 N4 H7 115.795 C2 N4 H8 115.758
H5 N3 H6 112.442 H7 N4 H8 112.442
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.145      
2 C 0.145      
3 N -0.775      
4 N -0.775      
5 H 0.314      
6 H 0.316      
7 H 0.314      
8 H 0.316      


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 1.335 1.335
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.093 3.812 0.000
y 3.812 -13.230 0.000
z 0.000 0.000 -24.183
Traceless
 xyz
x -5.387 3.812 0.000
y 3.812 10.908 0.000
z 0.000 0.000 -5.521
Polar
3z2-r2-11.043
x2-y2-10.863
xy3.812
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.742 0.107 0.000
y 0.107 9.767 0.000
z 0.000 0.000 3.736


<r2> (average value of r2) Å2
<r2> 97.252
(<r2>)1/2 9.862