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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-187.798437
Energy at 298.15K-187.802194
HF Energy-187.798437
Nuclear repulsion energy101.212128
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 PBEPBEultrafine/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3484 3426 6.23      
2 A 3406 3350 1.44      
3 A 2318 2280 0.35      
4 A 1634 1608 9.75      
5 A 1174 1155 0.56      
6 A 822 809 2.00      
7 A 548 539 152.51      
8 A 426 419 18.34      
9 A 374 368 6.43      
10 A 153 150 19.11      
11 B 3482 3425 5.73      
12 B 3410 3354 7.23      
13 B 1635 1608 14.05      
14 B 1382 1359 86.65      
15 B 1175 1155 0.55      
16 B 612 602 363.53      
17 B 370 364 13.97      
18 B 152 150 20.10      

Unscaled Zero Point Vibrational Energy (zpe) 13279.0 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 13059.9 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 PBEPBEultrafine/6-31G*
ABC
5.10340 0.11791 0.11789

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.613 0.029
C2 -0.007 -0.613 0.029
N3 -0.007 1.971 -0.070
N4 0.007 -1.971 -0.070
H5 -0.342 2.469 0.756
H6 0.847 2.393 -0.440
H7 0.342 -2.469 0.756
H8 -0.847 -2.393 -0.440

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22681.36132.58622.02292.02303.18443.1601
C21.22682.58621.36133.18443.16012.02292.0230
N31.36132.58623.94191.02101.02134.52944.4594
N42.58621.36133.94194.52944.45941.02101.0213
H52.02293.18441.02104.52941.68764.98475.0321
H62.02303.16011.02134.45941.68765.03215.0766
H73.18442.02294.52941.02104.98475.03211.6876
H83.16012.02304.45941.02135.03215.07661.6876

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.644 C1 N3 H5 115.496
C1 N3 H6 115.480 C2 C1 N3 175.644
C2 N4 H7 115.496 C2 N4 H8 115.480
H5 N3 H6 111.443 H7 N4 H8 111.443
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.178      
2 C 0.178      
3 N -0.837      
4 N -0.837      
5 H 0.328      
6 H 0.330      
7 H 0.328      
8 H 0.330      


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 1.604 1.604
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.938 4.613 0.000
y 4.613 -13.170 0.000
z 0.000 0.000 -23.253
Traceless
 xyz
x -4.727 4.613 0.000
y 4.613 9.926 0.000
z 0.000 0.000 -5.199
Polar
3z2-r2-10.398
x2-y2-9.768
xy4.613
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.773 0.469 0.000
y 0.469 9.577 0.000
z 0.000 0.000 2.745


<r2> (average value of r2) Å2
<r2> 97.964
(<r2>)1/2 9.898