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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: B2PLYP=FULL/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 B2PLYP=FULL/6-31+G**
 hartrees
Energy at 0K-187.866971
Energy at 298.15K-187.870787
HF Energy-187.662047
Nuclear repulsion energy101.591083
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/6-31+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 3682 3502 33.96      
2 A 3582 3406 1.43      
3 A 2363 2247 0.17      
4 A 1676 1594 11.30      
5 A 1204 1145 0.08      
6 A 826 786 2.83      
7 A 554 527 166.67      
8 A 402 382 11.95      
9 A 376 357 16.10      
10 A 171 162 21.86      
11 B 3682 3502 32.50      
12 B 3584 3409 14.31      
13 B 1678 1595 37.14      
14 B 1377 1309 127.14      
15 B 1203 1144 0.09      
16 B 605 575 330.00      
17 B 371 353 17.34      
18 B 167 159 22.91      

Unscaled Zero Point Vibrational Energy (zpe) 13750.3 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 13076.6 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/6-31+G**
ABC
5.23410 0.11844 0.11842

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.608 0.036
C2 -0.006 -0.608 0.036
N3 -0.006 1.967 -0.072
N4 0.006 -1.967 -0.072
H5 -0.350 2.467 0.737
H6 0.834 2.383 -0.450
H7 0.350 -2.467 0.737
H8 -0.834 -2.383 -0.450

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21701.36282.57772.01792.01783.17303.1452
C21.21702.57771.36283.17303.14522.01792.0178
N31.36282.57773.93401.01071.01094.52114.4446
N42.57771.36283.93404.52114.44461.01071.0109
H52.01793.17301.01074.52111.67804.98335.0169
H62.01783.14521.01094.44461.67805.01695.0501
H73.17302.01794.52111.01074.98335.01691.6780
H83.14522.01784.44461.01095.01695.05011.6780

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.363 C1 N3 H5 115.672
C1 N3 H6 115.648 C2 C1 N3 175.363
C2 N4 H7 115.672 C2 N4 H8 115.648
H5 N3 H6 112.211 H7 N4 H8 112.211
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability