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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP3/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/TZVP
 hartrees
Energy at 0K-187.579352
Energy at 298.15K-187.583358
HF Energy-186.945037
Nuclear repulsion energy101.966423
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/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 3709 3468 22.32      
2 A 3619 3384 3.08      
3 A 2450 2292 0.04      
4 A 1687 1578 15.61      
5 A 1237 1157 0.17      
6 A 832 778 11.80      
7 A 687 643 117.88      
8 A 399 373 0.44      
9 A 345 323 35.22      
10 A 197 184 16.15      
11 B 3709 3468 20.57      
12 B 3620 3386 15.48      
13 B 1687 1578 38.88      
14 B 1359 1271 95.18      
15 B 1236 1156 0.59      
16 B 743 695 342.98      
17 B 369 345 16.96      
18 B 183 171 17.46      

Unscaled Zero Point Vibrational Energy (zpe) 14033.8 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 13124.4 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/TZVP
ABC
5.10587 0.11953 0.11948

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.601 0.056
C2 -0.006 -0.601 0.056
N3 -0.006 1.954 -0.087
N4 0.006 -1.954 -0.087
H5 -0.332 2.454 0.723
H6 0.851 2.340 -0.447
H7 0.332 -2.454 0.723
H8 -0.851 -2.340 -0.447

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20111.36092.55841.99811.99803.14303.1035
C21.20112.55841.36093.14303.10351.99811.9980
N31.36092.55843.90781.00581.00594.49394.3909
N42.55841.36093.90784.49394.39091.00581.0059
H51.99813.14301.00584.49391.66724.95184.9613
H61.99803.10351.00594.39091.66724.96134.9793
H73.14301.99814.49391.00584.95184.96131.6672
H83.10351.99804.39091.00594.96134.97931.6672

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.895 C1 N3 H5 114.351
C1 N3 H6 114.332 C2 C1 N3 173.895
C2 N4 H7 114.351 C2 N4 H8 114.332
H5 N3 H6 111.943 H7 N4 H8 111.943
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability