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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2/aug-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 MP2/aug-cc-pVTZ
 hartrees
Energy at 0K-187.690992
Energy at 298.15K-187.694955
HF Energy-186.953543
Nuclear repulsion energy101.704792
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 MP2/aug-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 3660 3488 37.22      
2 A 3562 3394 1.47      
3 A 2365 2254 0.22      
4 A 1654 1577 9.49      
5 A 1208 1151 0.40      
6 A 815 776 6.52      
7 A 622 592 105.05      
8 A 385 366 3.23      
9 A 334 318 27.30      
10 A 204 194 19.67      
11 B 3660 3488 36.31      
12 B 3564 3396 19.72      
13 B 1654 1576 29.13      
14 B 1361 1297 115.25      
15 B 1207 1150 0.38      
16 B 670 638 272.32      
17 B 383 365 14.30      
18 B 204 194 16.82      

Unscaled Zero Point Vibrational Energy (zpe) 13754.9 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 13107.1 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 MP2/aug-cc-pVTZ
ABC
5.12816 0.11880 0.11878

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 0.607 0.055
C2 -0.003 -0.607 0.055
N3 -0.003 1.959 -0.086
N4 0.003 -1.959 -0.086
H5 -0.329 2.465 0.722
H6 0.853 2.348 -0.450
H7 0.329 -2.465 0.722
H8 -0.853 -2.348 -0.450

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21301.35962.56922.00222.00273.15983.1173
C21.21302.56921.35963.15983.11732.00222.0027
N31.35962.56923.91761.00791.00804.50914.4051
N42.56921.35963.91764.50914.40511.00791.0080
H52.00223.15981.00794.50911.66874.97334.9813
H62.00273.11731.00804.40511.66874.98134.9965
H73.15982.00224.50911.00794.97334.98131.6687
H83.11732.00274.40511.00804.98134.99651.6687

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.025 C1 N3 H5 114.678
C1 N3 H6 114.711 C2 C1 N3 174.025
C2 N4 H7 114.678 C2 N4 H8 114.711
H5 N3 H6 111.741 H7 N4 H8 111.741
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability