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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP3=FULL/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 MP3=FULL/6-31G*
 hartrees
Energy at 0K-187.472788
Energy at 298.15K-187.476823
HF Energy-186.869135
Nuclear repulsion energy101.487127
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 MP3=FULL/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 3666 3440 16.33      
2 A 3577 3356 3.54      
3 A 2472 2319 0.03      
4 A 1721 1615 16.86      
5 A 1251 1174 0.01      
6 A 839 788 14.02      
7 A 692 650 125.17      
8 A 391 367 0.02      
9 A 339 318 42.41      
10 A 212 199 13.12      
11 B 3666 3440 15.25      
12 B 3578 3358 11.70      
13 B 1721 1615 38.23      
14 B 1373 1288 74.68      
15 B 1250 1173 0.08      
16 B 748 702 417.71      
17 B 375 352 17.35      
18 B 209 196 14.69      

Unscaled Zero Point Vibrational Energy (zpe) 14039.1 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 13172.9 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 MP3=FULL/6-31G*
ABC
5.03616 0.11845 0.11840

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.604 0.036
C2 -0.006 -0.604 0.036
N3 -0.006 1.966 -0.077
N4 0.006 -1.966 -0.077
H5 -0.326 2.453 0.750
H6 0.854 2.365 -0.431
H7 0.326 -2.453 0.750
H8 -0.854 -2.365 -0.431

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20901.36592.57262.00942.00923.15623.1267
C21.20902.57261.36593.15623.12672.00942.0092
N31.36592.57263.93131.01191.01214.50794.4271
N42.57261.36593.93134.50794.42711.01191.0121
H52.00943.15621.01194.50791.67174.94974.9891
H62.00923.12671.01214.42711.67174.98915.0290
H73.15622.00944.50791.01194.94974.98911.6717
H83.12672.00924.42711.01214.98915.02901.6717

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.124 C1 N3 H5 114.540
C1 N3 H6 114.503 C2 C1 N3 175.124
C2 N4 H7 114.540 C2 N4 H8 114.503
H5 N3 H6 111.368 H7 N4 H8 111.368
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability