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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: HF/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 HF/6-31G*
 hartrees
Energy at 0K-186.871072
Energy at 298.15K-186.875509
HF Energy-186.871072
Nuclear repulsion energy102.628930
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 HF/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 3869 3476 25.85      
2 A 3773 3390 5.86      
3 A 2558 2298 0.04      
4 A 1825 1640 14.53      
5 A 1327 1193 0.02      
6 A 876 787 9.21      
7 A 684 614 166.53      
8 A 505 454 8.56      
9 A 391 351 32.27      
10 A 251 225 20.14      
11 B 3869 3476 25.15      
12 B 3774 3391 21.24      
13 B 1826 1641 44.07      
14 B 1428 1283 93.91      
15 B 1328 1193 0.04      
16 B 736 662 413.51      
17 B 506 455 35.42      
18 B 252 226 21.38      

Unscaled Zero Point Vibrational Energy (zpe) 14888.8 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 13377.6 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 HF/6-31G*
ABC
5.26647 0.12087 0.12084

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.595 -0.010
C2 -0.006 -0.595 -0.010
N3 -0.006 1.951 -0.049
N4 0.006 -1.951 -0.049
H5 -0.322 2.391 0.788
H6 0.837 2.365 -0.387
H7 0.322 -2.391 0.788
H8 -0.837 -2.365 -0.387

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.18931.35672.54561.99291.99163.10673.0999
C21.18932.54561.35673.10673.09991.99291.9916
N31.35672.54563.90140.99770.99794.43404.4076
N42.54561.35673.90144.43404.40760.99770.9979
H51.99293.10670.99774.43401.65144.82564.9258
H61.99163.09990.99794.40761.65144.92585.0165
H73.10671.99294.43400.99774.82564.92581.6514
H83.09991.99164.40760.99794.92585.01651.6514

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 178.038 C1 N3 H5 114.802
C1 N3 H6 114.661 C2 C1 N3 178.038
C2 N4 H7 114.802 C2 N4 H8 114.661
H5 N3 H6 111.687 H7 N4 H8 111.687
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.170      
2 C 0.170      
3 N -0.919      
4 N -0.919      
5 H 0.373      
6 H 0.375      
7 H 0.373      
8 H 0.375      


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 1.803 1.803
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.272 4.895 0.000
y 4.895 -14.884 0.000
z 0.000 0.000 -23.409
Traceless
 xyz
x -4.126 4.895 0.000
y 4.895 8.457 0.000
z 0.000 0.000 -4.331
Polar
3z2-r2-8.662
x2-y2-8.388
xy4.895
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.579 0.231 0.000
y 0.231 7.733 0.000
z 0.000 0.000 2.582


<r2> (average value of r2) Å2
<r2> 96.139
(<r2>)1/2 9.805