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: MP3/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/cc-pVDZ
 hartrees
Energy at 0K-187.501741
Energy at 298.15K-187.505832
HF Energy-186.892733
Nuclear repulsion energy100.889247
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/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 3656 3466 14.13      
2 A 3571 3385 3.32      
3 A 2439 2312 0.02      
4 A 1665 1578 12.55      
5 A 1244 1179 0.50      
6 A 835 791 22.19      
7 A 733 695 66.26      
8 A 387 367 1.34      
9 A 314 298 37.23      
10 A 214 203 14.46      
11 B 3656 3466 13.46      
12 B 3572 3386 7.52      
13 B 1664 1577 20.49      
14 B 1347 1277 78.09      
15 B 1244 1179 0.46      
16 B 801 759 327.68      
17 B 389 369 16.40      
18 B 215 204 17.26      

Unscaled Zero Point Vibrational Energy (zpe) 13972.0 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 13244.1 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/cc-pVDZ
ABC
4.88312 0.11707 0.11704

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.611 0.043
C2 -0.005 -0.611 0.043
N3 -0.005 1.975 -0.084
N4 0.005 -1.975 -0.084
H5 -0.308 2.460 0.754
H6 0.872 2.358 -0.424
H7 0.308 -2.460 0.754
H8 -0.872 -2.358 -0.424

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22241.36982.58932.00522.00543.16673.1310
C21.22242.58931.36983.16673.13102.00522.0054
N31.36982.58933.94991.01501.01524.52414.4320
N42.58931.36983.94994.52414.43201.01501.0152
H52.00523.16671.01504.52411.67064.95784.9918
H62.00543.13101.01524.43201.67064.99185.0282
H73.16672.00524.52411.01504.95784.99181.6706
H83.13102.00544.43201.01524.99185.02821.6706

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.594 C1 N3 H5 113.623
C1 N3 H6 113.630 C2 C1 N3 174.594
C2 N4 H7 113.623 C2 N4 H8 113.630
H5 N3 H6 110.744 H7 N4 H8 110.744
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability