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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCD/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 CCD/6-31G**
 hartrees
Energy at 0K-187.498366
Energy at 298.15K-187.502336
HF Energy-186.884453
Nuclear repulsion energy101.395762
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 CCD/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 3717 3485 12.93      
2 A 3620 3394 2.71      
3 A 2450 2297 0.00      
4 A 1707 1600 14.52      
5 A 1245 1168 0.02      
6 A 833 781 15.49      
7 A 696 652 106.19      
8 A 383 359 0.05      
9 A 326 306 41.13      
10 A 208 195 10.92      
11 B 3717 3485 12.07      
12 B 3622 3396 7.52      
13 B 1706 1600 29.58      
14 B 1362 1277 69.92      
15 B 1244 1167 0.25      
16 B 752 705 386.51      
17 B 346 325 17.92      
18 B 196 184 11.32      

Unscaled Zero Point Vibrational Energy (zpe) 14065.5 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 13187.8 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 CCD/6-31G**
ABC
5.04731 0.11808 0.11802

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.606 0.035
C2 -0.007 -0.606 0.035
N3 -0.007 1.969 -0.076
N4 0.007 -1.969 -0.076
H5 -0.323 2.450 0.751
H6 0.851 2.367 -0.425
H7 0.323 -2.450 0.751
H8 -0.851 -2.367 -0.425

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21211.36742.57722.00542.00553.15443.1280
C21.21212.57721.36743.15443.12802.00542.0055
N31.36742.57723.93761.00791.00814.50744.4304
N42.57721.36743.93764.50744.43041.00791.0081
H52.00543.15441.00794.50741.66404.94184.9858
H62.00553.12801.00814.43041.66404.98585.0297
H73.15442.00544.50741.00794.94184.98581.6640
H83.12802.00554.43041.00814.98585.02971.6640

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.157 C1 N3 H5 114.344
C1 N3 H6 114.343 C2 C1 N3 175.157
C2 N4 H7 114.344 C2 N4 H8 114.343
H5 N3 H6 111.264 H7 N4 H8 111.264
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability