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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2=FULL/6-311G*

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=FULL/6-311G*
 hartrees
Energy at 0K-187.589783
Energy at 298.15K-187.593861
HF Energy-186.914886
Nuclear repulsion energy101.613747
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=FULL/6-311G*
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 3690 3495 19.13      
2 A 3592 3402 3.07      
3 A 2390 2264 0.25      
4 A 1729 1637 18.45      
5 A 1250 1184 0.11      
6 A 823 780 16.07      
7 A 690 653 132.38      
8 A 395 374 0.29      
9 A 350 332 38.36      
10 A 209 198 17.34      
11 B 3691 3495 18.13      
12 B 3595 3404 11.24      
13 B 1729 1637 42.75      
14 B 1376 1303 86.35      
15 B 1249 1183 0.13      
16 B 745 706 406.53      
17 B 392 371 14.94      
18 B 209 198 20.63      

Unscaled Zero Point Vibrational Energy (zpe) 14052.2 cm-1
Scaled (by 0.9471) Zero Point Vibrational Energy (zpe) 13308.9 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 MP2=FULL/6-311G*
ABC
5.10037 0.11859 0.11855

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 0.608 0.059
C2 -0.003 -0.608 0.059
N3 -0.003 1.960 -0.089
N4 0.003 -1.960 -0.089
H5 -0.325 2.466 0.721
H6 0.857 2.342 -0.452
H7 0.325 -2.466 0.721
H8 -0.857 -2.342 -0.452

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21541.36042.57191.99931.99943.16023.1146
C21.21542.57191.36043.16023.11461.99931.9994
N31.36042.57193.91981.00811.00834.51104.4006
N42.57191.36043.91984.51104.40061.00811.0083
H51.99933.16021.00814.51101.66984.97384.9771
H61.99943.11461.00834.40061.66984.97714.9872
H73.16021.99934.51101.00814.97384.97711.6698
H83.11461.99944.40061.00834.97714.98721.6698

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.696 C1 N3 H5 114.337
C1 N3 H6 114.338 C2 C1 N3 173.696
C2 N4 H7 114.337 C2 N4 H8 114.338
H5 N3 H6 111.812 H7 N4 H8 111.812
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability