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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP3=FULL/TZVP

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=FULL/TZVP
 hartrees
Energy at 0K-187.651124
Energy at 298.15K-187.655142
HF Energy-186.945259
Nuclear repulsion energy102.035351
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=FULL/TZVP
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 3710 3464 22.73      
2 A 3620 3380 3.09      
3 A 2454 2291 0.08      
4 A 1687 1575 15.39      
5 A 1236 1154 0.14      
6 A 832 777 10.71      
7 A 681 636 122.03      
8 A 397 371 0.32      
9 A 348 325 34.87      
10 A 198 185 16.50      
11 B 3710 3464 21.08      
12 B 3621 3381 15.92      
13 B 1687 1575 39.55      
14 B 1362 1272 97.23      
15 B 1235 1153 0.42      
16 B 737 688 343.81      
17 B 375 351 16.78      
18 B 189 176 18.17      

Unscaled Zero Point Vibrational Energy (zpe) 14038.7 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 13107.9 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=FULL/TZVP
ABC
5.12069 0.11969 0.11964

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.600 0.056
C2 -0.005 -0.600 0.056
N3 -0.005 1.953 -0.087
N4 0.005 -1.953 -0.087
H5 -0.332 2.453 0.722
H6 0.851 2.338 -0.447
H7 0.332 -2.453 0.722
H8 -0.851 -2.338 -0.447

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20011.36012.55661.99761.99753.14183.1017
C21.20012.55661.36013.14183.10171.99761.9975
N31.36012.55663.90521.00551.00574.49174.3884
N42.55661.36013.90524.49174.38841.00551.0057
H51.99763.14181.00554.49171.66694.95044.9591
H61.99753.10171.00574.38841.66694.95914.9768
H73.14181.99764.49171.00554.95044.95911.6669
H83.10171.99754.38841.00574.95914.97681.6669

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.909 C1 N3 H5 114.390
C1 N3 H6 114.368 C2 C1 N3 173.909
C2 N4 H7 114.390 C2 N4 H8 114.368
H5 N3 H6 111.959 H7 N4 H8 111.959
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability