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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2/cc-pVTZ
 hartrees
Energy at 0K-187.674776
Energy at 298.15K-187.678827
HF Energy-186.950079
Nuclear repulsion energy101.739733
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 MP2/cc-pVTZ
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 3664 3479 29.47      
2 A 3566 3386 2.70      
3 A 2377 2257 0.20      
4 A 1654 1570 11.13      
5 A 1216 1155 0.13      
6 A 818 777 9.57      
7 A 652 619 99.18      
8 A 396 376 2.73      
9 A 334 317 28.92      
10 A 213 202 16.95      
11 B 3665 3479 28.47      
12 B 3568 3388 19.81      
13 B 1653 1569 27.21      
14 B 1363 1294 98.48      
15 B 1216 1155 0.13      
16 B 703 668 314.94      
17 B 397 377 14.40      
18 B 214 203 20.19      

Unscaled Zero Point Vibrational Energy (zpe) 13834.8 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 13136.2 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 MP2/cc-pVTZ
ABC
5.09406 0.11891 0.11888

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 0.606 0.062
C2 -0.002 -0.606 0.062
N3 -0.002 1.956 -0.092
N4 0.002 -1.956 -0.092
H5 -0.319 2.464 0.717
H6 0.860 2.335 -0.448
H7 0.319 -2.464 0.717
H8 -0.860 -2.335 -0.448

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21251.35872.56711.99561.99613.15513.1070
C21.21252.56711.35873.15513.10701.99561.9961
N31.35872.56713.91231.00661.00684.50494.3902
N42.56711.35873.91234.50494.39021.00661.0068
H51.99563.15511.00664.50491.66314.96874.9674
H61.99613.10701.00684.39021.66314.96744.9762
H73.15511.99564.50491.00664.96874.96741.6631
H83.10701.99614.39021.00684.96744.97621.6631

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.463 C1 N3 H5 114.238
C1 N3 H6 114.274 C2 C1 N3 173.463
C2 N4 H7 114.238 C2 N4 H8 114.274
H5 N3 H6 111.383 H7 N4 H8 111.383
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability