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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP3/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-187.689446
Energy at 298.15K-187.693604
HF Energy-186.951532
Nuclear repulsion energy102.014918
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/cc-pVTZ
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 3697 3493 25.84      
2 A 3611 3411 2.70      
3 A 2443 2308 0.09      
4 A 1681 1588 11.31      
5 A 1237 1169 0.38      
6 A 830 784 8.60      
7 A 656 620 101.58      
8 A 429 405 2.96      
9 A 344 325 28.23      
10 A 221 209 18.20      
11 B 3698 3493 25.16      
12 B 3612 3412 19.53      
13 B 1680 1587 30.80      
14 B 1361 1285 100.45      
15 B 1237 1168 0.39      
16 B 709 670 316.90      
17 B 429 405 17.21      
18 B 222 209 20.91      

Unscaled Zero Point Vibrational Energy (zpe) 14047.0 cm-1
Scaled (by 0.9447) Zero Point Vibrational Energy (zpe) 13270.2 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/cc-pVTZ
ABC
5.12044 0.11954 0.11952

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 0.601 0.061
C2 -0.002 -0.601 0.061
N3 -0.002 1.952 -0.091
N4 0.002 -1.952 -0.091
H5 -0.323 2.456 0.716
H6 0.859 2.330 -0.444
H7 0.323 -2.456 0.716
H8 -0.859 -2.330 -0.444

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20191.36002.55791.99441.99473.14323.0963
C21.20192.55791.36003.14323.09631.99441.9947
N31.36002.55793.90501.00381.00404.49384.3818
N42.55791.36003.90504.49384.38181.00381.0040
H51.99443.14321.00384.49381.66034.95504.9541
H61.99473.09631.00404.38181.66034.95414.9668
H73.14321.99444.49381.00384.95504.95411.6603
H83.09631.99474.38181.00404.95414.96681.6603

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.596 C1 N3 H5 114.220
C1 N3 H6 114.236 C2 C1 N3 173.596
C2 N4 H7 114.220 C2 N4 H8 114.236
H5 N3 H6 111.565 H7 N4 H8 111.565
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability