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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP3=FULL/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-187.511103
Energy at 298.15K-187.515211
HF Energy-186.892983
Nuclear repulsion energy100.969447
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/cc-pVDZ
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 3662 3443 14.49      
2 A 3576 3362 3.37      
3 A 2442 2296 0.03      
4 A 1667 1568 12.49      
5 A 1245 1170 0.49      
6 A 835 785 20.69      
7 A 731 688 69.01      
8 A 392 369 1.43      
9 A 316 298 36.71      
10 A 216 203 14.84      
11 B 3662 3443 13.82      
12 B 3577 3364 7.76      
13 B 1666 1567 20.79      
14 B 1351 1270 79.62      
15 B 1244 1170 0.44      
16 B 798 751 328.71      
17 B 394 371 16.52      
18 B 217 204 17.54      

Unscaled Zero Point Vibrational Energy (zpe) 13995.9 cm-1
Scaled (by 0.9403) Zero Point Vibrational Energy (zpe) 13160.4 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/cc-pVDZ
ABC
4.89578 0.11725 0.11722

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.611 0.044
C2 -0.005 -0.611 0.044
N3 -0.005 1.973 -0.085
N4 0.005 -1.973 -0.085
H5 -0.308 2.458 0.753
H6 0.872 2.356 -0.424
H7 0.308 -2.458 0.753
H8 -0.872 -2.356 -0.424

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22151.36872.58732.00372.00393.16453.1284
C21.22152.58731.36873.16453.12842.00372.0039
N31.36872.58733.94681.01431.01454.52114.4282
N42.58731.36873.94684.52114.42821.01431.0145
H52.00373.16451.01434.52111.66934.95514.9880
H62.00393.12841.01454.42821.66934.98805.0237
H73.16452.00374.52111.01434.95514.98801.6693
H83.12842.00394.42821.01454.98805.02371.6693

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.555 C1 N3 H5 113.618
C1 N3 H6 113.624 C2 C1 N3 174.555
C2 N4 H7 113.618 C2 N4 H8 113.624
H5 N3 H6 110.737 H7 N4 H8 110.737
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability