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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-187.514301
Energy at 298.15K-187.518338
HF Energy-186.914634
Nuclear repulsion energy101.515160
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 MP2/6-311G*
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 3686 3503 18.61      
2 A 3588 3410 3.01      
3 A 2384 2265 0.23      
4 A 1729 1643 18.82      
5 A 1251 1188 0.09      
6 A 822 781 19.00      
7 A 696 661 126.01      
8 A 385 366 0.04      
9 A 346 329 39.82      
10 A 203 193 16.34      
11 B 3686 3503 17.57      
12 B 3590 3412 10.74      
13 B 1728 1642 41.83      
14 B 1370 1302 83.85      
15 B 1250 1187 0.12      
16 B 753 716 406.23      
17 B 379 360 15.01      
18 B 203 193 19.63      

Unscaled Zero Point Vibrational Energy (zpe) 14023.4 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 13326.4 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 MP2/6-311G*
ABC
5.08582 0.11835 0.11830

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

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 1.962 -0.089
N4 0.003 -1.962 -0.089
H5 -0.324 2.467 0.722
H6 0.857 2.344 -0.452
H7 0.324 -2.467 0.722
H8 -0.857 -2.344 -0.452

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21631.36182.57422.00042.00063.16203.1171
C21.21632.57421.36183.16203.11712.00042.0006
N31.36182.57423.92361.00841.00864.51424.4045
N42.57421.36183.92364.51424.40451.00841.0086
H52.00043.16201.00844.51421.66994.97604.9804
H62.00063.11711.00864.40451.66994.98044.9914
H73.16202.00044.51421.00844.97604.98041.6699
H83.11712.00064.40451.00864.98044.99141.6699

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.712 C1 N3 H5 114.305
C1 N3 H6 114.309 C2 C1 N3 173.712
C2 N4 H7 114.305 C2 N4 H8 114.309
H5 N3 H6 111.772 H7 N4 H8 111.772
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability