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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: MP2/aug-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 MP2/aug-cc-pVDZ
 hartrees
Energy at 0K-187.523467
Energy at 298.15K-187.527254
HF Energy-186.905354
Nuclear repulsion energy100.724835
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/aug-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 3643 3494 30.79      
2 A 3539 3394 1.13      
3 A 2357 2261 0.17      
4 A 1635 1568 9.97      
5 A 1201 1152 0.47      
6 A 807 774 7.51      
7 A 629 603 96.94      
8 A 343 329 0.41      
9 A 321 308 34.01      
10 A 178 171 13.50      
11 B 3643 3494 29.77      
12 B 3541 3396 13.86      
13 B 1636 1569 26.28      
14 B 1349 1294 105.50      
15 B 1200 1151 0.48      
16 B 680 652 270.13      
17 B 338 324 14.94      
18 B 180 172 16.46      

Unscaled Zero Point Vibrational Energy (zpe) 13610.2 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 13052.2 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/aug-cc-pVDZ
ABC
5.02165 0.11646 0.11644

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.616 0.038
C2 -0.006 -0.616 0.038
N3 -0.006 1.980 -0.076
N4 0.006 -1.980 -0.076
H5 -0.333 2.476 0.748
H6 0.850 2.387 -0.441
H7 0.333 -2.476 0.748
H8 -0.850 -2.387 -0.441

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.23191.36942.59892.01912.01963.18873.1590
C21.23192.59891.36943.18873.15902.01912.0196
N31.36942.59893.96101.01501.01514.54414.4634
N42.59891.36943.96104.54414.46341.01501.0151
H52.01913.18871.01504.54411.67884.99555.0324
H62.01963.15901.01514.46341.67885.03245.0678
H73.18872.01914.54411.01504.99555.03241.6788
H83.15902.01964.46341.01515.03245.06781.6788

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.134 C1 N3 H5 114.922
C1 N3 H6 114.960 C2 C1 N3 175.134
C2 N4 H7 114.922 C2 N4 H8 114.960
H5 N3 H6 111.577 H7 N4 H8 111.577
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability