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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-187.455932
Energy at 298.15K-187.459900
HF Energy-186.868694
Nuclear repulsion energy101.374269
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 MP3/6-31G*
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 3665 3440 16.04      
2 A 3575 3356 3.49      
3 A 2464 2312 0.00      
4 A 1720 1615 17.10      
5 A 1250 1174 0.01      
6 A 838 787 14.73      
7 A 699 656 118.03      
8 A 393 369 0.00      
9 A 333 312 43.36      
10 A 207 194 12.01      
11 B 3665 3440 14.64      
12 B 3577 3357 11.55      
13 B 1720 1614 37.64      
14 B 1368 1284 71.97      
15 B 1249 1172 0.36      
16 B 754 708 415.88      
17 B 346 325 18.18      
18 B 188 177 12.04      

Unscaled Zero Point Vibrational Energy (zpe) 14005.8 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 13145.9 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 MP3/6-31G*
ABC
5.01577 0.11820 0.11814

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.008 0.605 0.034
C2 -0.008 -0.605 0.034
N3 -0.008 1.968 -0.076
N4 0.008 -1.968 -0.076
H5 -0.328 2.453 0.753
H6 0.851 2.370 -0.429
H7 0.328 -2.453 0.753
H8 -0.851 -2.370 -0.429

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21061.36762.57592.01072.01053.15763.1316
C21.21062.57591.36763.15763.13162.01072.0105
N31.36762.57593.93661.01211.01224.51064.4341
N42.57591.36763.93664.51064.43411.01211.0122
H52.01073.15761.01214.51061.67184.94904.9935
H62.01053.13161.01224.43411.67184.99355.0373
H73.15762.01074.51061.01214.94904.99351.6718
H83.13162.01054.43411.01224.99355.03731.6718

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.194 C1 N3 H5 114.511
C1 N3 H6 114.482 C2 C1 N3 175.194
C2 N4 H7 114.511 C2 N4 H8 114.482
H5 N3 H6 111.354 H7 N4 H8 111.354
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability