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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-31+G**
 hartrees
Energy at 0K-187.850254
Energy at 298.15K-187.854132
HF Energy-187.850254
Nuclear repulsion energy102.044119
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 HSEh1PBE/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 3689 3522 37.33      
2 A 3589 3427 1.51      
3 A 2384 2277 0.34      
4 A 1656 1581 8.37      
5 A 1184 1131 0.35      
6 A 848 810 0.92      
7 A 468 447 154.68      
8 A 445 425 0.39      
9 A 414 396 53.27      
10 A 188 179 29.02      
11 B 3689 3522 36.10      
12 B 3593 3430 13.70      
13 B 1661 1586 44.31      
14 B 1414 1350 144.34      
15 B 1184 1130 0.39      
16 B 513 490 300.93      
17 B 419 400 35.01      
18 B 188 180 30.05      

Unscaled Zero Point Vibrational Energy (zpe) 13762.8 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 13140.7 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 HSEh1PBE/6-31+G**
ABC
5.32714 0.11957 0.11956

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.607 0.037
C2 -0.005 -0.607 0.037
N3 -0.005 1.958 -0.071
N4 0.005 -1.958 -0.071
H5 -0.353 2.462 0.733
H6 0.834 2.374 -0.454
H7 0.353 -2.462 0.733
H8 -0.834 -2.374 -0.454

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21441.35512.56742.01302.01283.16613.1359
C21.21442.56741.35513.16613.13592.01302.0128
N31.35512.56743.91581.01111.01134.50644.4276
N42.56741.35513.91584.50644.42761.01111.0113
H52.01303.16611.01114.50641.68094.97365.0028
H62.01283.13591.01134.42761.68095.00285.0331
H73.16612.01304.50641.01114.97365.00281.6809
H83.13592.01284.42761.01135.00285.03311.6809

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.360 C1 N3 H5 115.824
C1 N3 H6 115.788 C2 C1 N3 175.360
C2 N4 H7 115.824 C2 N4 H8 115.788
H5 N3 H6 112.434 H7 N4 H8 112.434
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.149      
2 C 0.149      
3 N -0.774      
4 N -0.774      
5 H 0.312      
6 H 0.314      
7 H 0.312      
8 H 0.314      


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 1.324 1.324
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.153 3.776 0.000
y 3.776 -13.239 0.000
z 0.000 0.000 -24.239
Traceless
 xyz
x -5.414 3.776 0.000
y 3.776 10.957 0.000
z 0.000 0.000 -5.543
Polar
3z2-r2-11.086
x2-y2-10.914
xy3.776
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.771 0.111 0.000
y 0.111 9.846 0.000
z 0.000 0.000 3.765


<r2> (average value of r2) Å2
<r2> 97.320
(<r2>)1/2 9.865