return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: B2PLYP=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 B2PLYP=FULL/6-31G*
 hartrees
Energy at 0K-187.830003
Energy at 298.15K-187.833957
HF Energy-187.635303
Nuclear repulsion energy101.551205
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 B2PLYP=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 3625 3438 13.19      
2 A 3535 3353 2.71      
3 A 2383 2260 0.17      
4 A 1702 1615 12.93      
5 A 1230 1167 0.13      
6 A 829 786 6.19      
7 A 632 600 144.55      
8 A 391 371 3.65      
9 A 379 360 30.56      
10 A 189 179 16.07      
11 B 3625 3438 12.56      
12 B 3538 3356 5.44      
13 B 1702 1614 24.88      
14 B 1380 1309 84.57      
15 B 1230 1167 0.13      
16 B 689 653 394.88      
17 B 379 360 16.44      
18 B 187 178 17.25      

Unscaled Zero Point Vibrational Energy (zpe) 13813.6 cm-1
Scaled (by 0.9484) Zero Point Vibrational Energy (zpe) 13100.8 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 B2PLYP=FULL/6-31G*
ABC
5.11862 0.11854 0.11851

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.608 0.035
C2 -0.006 -0.608 0.035
N3 -0.006 1.965 -0.075
N4 0.006 -1.965 -0.075
H5 -0.332 2.459 0.746
H6 0.848 2.372 -0.436
H7 0.332 -2.459 0.746
H8 -0.848 -2.372 -0.436

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21611.36152.57542.01132.01123.16513.1360
C21.21612.57541.36153.16513.13602.01132.0112
N31.36152.57543.93001.01251.01274.51214.4332
N42.57541.36153.93004.51214.43321.01251.0127
H52.01133.16511.01254.51211.67294.96245.0005
H62.01123.13601.01274.43321.67295.00055.0390
H73.16512.01134.51211.01254.96245.00051.6729
H83.13602.01124.43321.01275.00055.03901.6729

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.241 C1 N3 H5 115.035
C1 N3 H6 115.011 C2 C1 N3 175.241
C2 N4 H7 115.035 C2 N4 H8 115.011
H5 N3 H6 111.401 H7 N4 H8 111.401
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability