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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: CCD/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCD/6-311G*
 hartrees
Energy at 0K-187.532385
Energy at 298.15K-187.536514
HF Energy-186.915464
Nuclear repulsion energy101.571592
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 CCD/6-311G*
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 3671 3506 12.22      
2 A 3583 3422 2.41      
3 A 2425 2316 0.10      
4 A 1739 1661 18.82      
5 A 1264 1207 0.00      
6 A 829 792 23.19      
7 A 708 677 115.53      
8 A 407 389 0.58      
9 A 346 330 39.02      
10 A 214 204 16.71      
11 B 3671 3506 11.58      
12 B 3584 3423 6.02      
13 B 1739 1661 42.66      
14 B 1358 1297 78.19      
15 B 1263 1206 0.02      
16 B 770 735 404.10      
17 B 404 386 16.43      
18 B 214 204 19.54      

Unscaled Zero Point Vibrational Energy (zpe) 14093.5 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 13460.7 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 CCD/6-311G*
ABC
5.06269 0.11853 0.11850

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-311G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 0.604 0.054
C2 -0.003 -0.604 0.054
N3 -0.003 1.962 -0.087
N4 0.003 -1.962 -0.087
H5 -0.324 2.461 0.729
H6 0.858 2.345 -0.444
H7 0.324 -2.461 0.729
H8 -0.858 -2.345 -0.444

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20861.36472.56992.00252.00253.15513.1130
C21.20862.56991.36473.15513.11302.00252.0025
N31.36472.56993.92341.00851.00874.50924.4055
N42.56991.36473.92344.50924.40551.00851.0087
H52.00253.15511.00854.50921.66924.96454.9762
H62.00253.11301.00874.40551.66924.97624.9948
H73.15512.00254.50921.00854.96454.97621.6692
H83.11302.00254.40551.00874.97624.99481.6692

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.053 C1 N3 H5 114.253
C1 N3 H6 114.238 C2 C1 N3 174.053
C2 N4 H7 114.253 C2 N4 H8 114.238
H5 N3 H6 111.692 H7 N4 H8 111.692
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability