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: CCD/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 CCD/cc-pVDZ
 hartrees
Energy at 0K-187.504480
Energy at 298.15K-187.508563
HF Energy-186.892235
Nuclear repulsion energy100.755180
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/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 3633 3475 12.45      
2 A 3545 3391 2.88      
3 A 2421 2316 0.03      
4 A 1662 1590 12.51      
5 A 1243 1189 0.50      
6 A 834 798 28.61      
7 A 737 705 57.05      
8 A 385 368 1.50      
9 A 305 292 37.08      
10 A 215 206 14.19      
11 B 3633 3475 11.84      
12 B 3546 3393 5.82      
13 B 1661 1589 19.56      
14 B 1341 1283 72.69      
15 B 1243 1189 0.44      
16 B 810 775 324.04      
17 B 387 370 16.22      
18 B 216 206 16.64      

Unscaled Zero Point Vibrational Energy (zpe) 13907.5 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 13305.3 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/cc-pVDZ
ABC
4.86210 0.11678 0.11674

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.612 0.040
C2 -0.005 -0.612 0.040
N3 -0.005 1.977 -0.083
N4 0.005 -1.977 -0.083
H5 -0.307 2.460 0.759
H6 0.873 2.362 -0.422
H7 0.307 -2.460 0.759
H8 -0.873 -2.362 -0.422

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22381.37082.59192.00742.00773.16943.1353
C21.22382.59191.37083.16943.13532.00742.0077
N31.37082.59193.95431.01631.01654.52724.4384
N42.59191.37083.95434.52724.43841.01631.0165
H52.00743.16941.01634.52721.67184.95854.9971
H62.00773.13531.01654.43841.67184.99715.0369
H73.16942.00744.52721.01634.95854.99711.6718
H83.13532.00774.43841.01654.99715.03691.6718

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.775 C1 N3 H5 113.648
C1 N3 H6 113.657 C2 C1 N3 174.775
C2 N4 H7 113.648 C2 N4 H8 113.657
H5 N3 H6 110.656 H7 N4 H8 110.656
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability