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=FULL/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 MP3=FULL/cc-pVTZ
 hartrees
Energy at 0K-187.751341
Energy at 298.15K-187.755573
HF Energy-186.952186
Nuclear repulsion energy102.424126
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-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 3718 3467 27.72      
2 A 3633 3388 2.70      
3 A 2468 2302 0.10      
4 A 1694 1580 10.51      
5 A 1236 1152 0.27      
6 A 839 782 5.26      
7 A 626 584 111.51      
8 A 458 427 5.74      
9 A 362 337 25.17      
10 A 233 217 19.74      
11 B 3718 3467 26.96      
12 B 3634 3389 21.18      
13 B 1693 1579 33.27      
14 B 1382 1289 109.88      
15 B 1235 1152 0.28      
16 B 675 630 315.17      
17 B 458 427 21.54      
18 B 232 217 21.79      

Unscaled Zero Point Vibrational Energy (zpe) 14146.9 cm-1
Scaled (by 0.9326) Zero Point Vibrational Energy (zpe) 13193.4 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-pVTZ
ABC
5.19242 0.12053 0.12051

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 0.599 0.065
C2 -0.001 -0.599 0.065
N3 -0.001 1.944 -0.093
N4 0.001 -1.944 -0.093
H5 -0.326 2.453 0.706
H6 0.856 2.320 -0.449
H7 0.326 -2.453 0.706
H8 -0.856 -2.320 -0.449

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.19731.35442.54741.98961.98993.13563.0856
C21.19732.54741.35443.13563.08561.98961.9899
N31.35442.54743.88771.00191.00214.48124.3638
N42.54741.35443.88774.48124.36381.00191.0021
H51.98963.13561.00194.48121.65864.94994.9401
H61.98993.08561.00214.36381.65864.94014.9469
H73.13561.98964.48121.00194.94994.94011.6586
H83.08561.98994.36381.00214.94014.94691.6586

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.309 C1 N3 H5 114.380
C1 N3 H6 114.393 C2 C1 N3 173.309
C2 N4 H7 114.380 C2 N4 H8 114.393
H5 N3 H6 111.720 H7 N4 H8 111.720
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability