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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-187.486246
Energy at 298.15K-187.490098
HF Energy-186.865774
Nuclear repulsion energy100.822793
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 MP4/6-31G*
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 3594 3432 0.00      
2 A 3500 3342 0.00      
3 A 2350 2244 0.00      
4 A 1702 1625 0.00      
5 A 1237 1181 0.00      
6 A 823 785 0.00      
7 A 709 677 0.00      
8 A 384 366 0.00      
9 A 319 304 0.00      
10 A 196 187 0.00      
11 B 3594 3432 0.00      
12 B 3503 3344 0.00      
13 B 1701 1624 0.00      
14 B 1348 1287 0.00      
15 B 1234 1178 0.00      
16 B 771 736 0.00      
17 B 319 304 0.00      
18 B 159 152 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13720.2 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 13100.1 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 MP4/6-31G*
ABC
4.92132 0.11699 0.11690

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.078 0.607 -0.020
C2 -0.078 -0.607 -0.020
N3 0.078 1.983 -0.052
N4 -0.078 -1.983 -0.052
H5 -0.177 2.399 0.842
H6 0.968 2.367 -0.364
H7 0.177 -2.399 0.842
H8 -0.968 -2.367 -0.364

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22301.37672.59422.00502.00263.12803.1710
C21.22302.59421.37673.12803.17102.00502.0026
N31.37672.59423.96871.01841.01854.47294.4848
N42.59421.37673.96874.47294.48481.01841.0185
H52.00503.12801.01844.47291.66354.81044.9794
H62.00263.17101.01854.48481.66354.97945.1147
H73.12802.00504.47291.01844.81044.97941.6635
H83.17102.00264.48481.01854.97945.11471.6635

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 172.550 C1 N3 H5 112.823
C1 N3 H6 112.601 C2 C1 N3 172.550
C2 N4 H7 112.823 C2 N4 H8 112.601
H5 N3 H6 109.507 H7 N4 H8 109.507
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability