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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2/6-31+G**
 hartrees
Energy at 0K-187.493495
Energy at 298.15K-187.497411
HF Energy-186.892064
Nuclear repulsion energy101.226590
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 MP2/6-31+G**
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 3721 3500 36.97      
2 A 3611 3396 1.99      
3 A 2378 2237 0.02      
4 A 1691 1590 15.23      
5 A 1226 1153 0.00      
6 A 824 775 9.20      
7 A 668 628 131.43      
8 A 412 387 1.34      
9 A 336 316 35.26      
10 A 206 194 16.32      
11 B 3721 3500 32.80      
12 B 3613 3398 19.89      
13 B 1691 1590 41.12      
14 B 1370 1289 104.33      
15 B 1222 1149 0.98      
16 B 712 669 337.82      
17 B 331 311 18.43      
18 B 168 158 15.06      

Unscaled Zero Point Vibrational Energy (zpe) 13948.8 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 13120.2 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 MP2/6-31+G**
ABC
5.07609 0.11772 0.11764

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.009 0.611 0.037
C2 -0.009 -0.611 0.037
N3 -0.009 1.973 -0.075
N4 0.009 -1.973 -0.075
H5 -0.341 2.464 0.743
H6 0.837 2.383 -0.442
H7 0.341 -2.464 0.743
H8 -0.837 -2.383 -0.442

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22131.36692.58582.01412.01433.17203.1479
C21.22132.58581.36693.17203.14792.01412.0143
N31.36692.58583.94571.01011.01024.52514.4492
N42.58581.36693.94574.52514.44921.01011.0102
H52.01413.17201.01014.52511.67374.97495.0146
H62.01433.14791.01024.44921.67375.01465.0521
H73.17202.01414.52511.01014.97495.01461.6737
H83.14792.01434.44921.01025.01465.05211.6737

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.029 C1 N3 H5 115.020
C1 N3 H6 115.029 C2 C1 N3 175.029
C2 N4 H7 115.020 C2 N4 H8 115.029
H5 N3 H6 111.882 H7 N4 H8 111.882
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability