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: TPSSh/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 TPSSh/aug-cc-pVDZ
 hartrees
Energy at 0K-188.072146
Energy at 298.15K-188.075904
HF Energy-188.072146
Nuclear repulsion energy101.531180
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 TPSSh/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 3572 3455 16.62      
2 A 3485 3371 0.34      
3 A 2353 2276 0.11      
4 A 1637 1583 7.27      
5 A 1182 1144 0.38      
6 A 822 795 2.12      
7 A 525 508 115.85      
8 A 411 397 12.52      
9 A 374 362 11.51      
10 A 152 147 19.55      
11 B 3572 3455 15.94      
12 B 3488 3374 0.59      
13 B 1637 1584 17.60      
14 B 1371 1326 119.24      
15 B 1182 1143 0.41      
16 B 589 570 271.59      
17 B 374 362 15.38      
18 B 153 148 21.70      

Unscaled Zero Point Vibrational Energy (zpe) 13438.5 cm-1
Scaled (by 0.9673) Zero Point Vibrational Energy (zpe) 12999.1 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 TPSSh/aug-cc-pVDZ
ABC
5.16110 0.11853 0.11852

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.610 0.050
C2 -0.005 -0.610 0.050
N3 -0.005 1.963 -0.081
N4 0.005 -1.963 -0.081
H5 -0.343 2.476 0.727
H6 0.846 2.371 -0.458
H7 0.343 -2.476 0.727
H8 -0.846 -2.371 -0.458

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22021.35982.57692.01552.01633.17783.1411
C21.22022.57691.35983.17783.14112.01552.0163
N31.35982.57693.92701.01531.01554.52614.4311
N42.57691.35983.92704.52614.43111.01531.0155
H52.01553.17781.01534.52611.68194.99995.0150
H62.01633.14111.01554.43111.68195.01505.0341
H73.17782.01554.52611.01534.99995.01501.6819
H83.14112.01634.43111.01555.01505.03411.6819

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.399 C1 N3 H5 115.354
C1 N3 H6 115.412 C2 C1 N3 174.399
C2 N4 H7 115.354 C2 N4 H8 115.412
H5 N3 H6 111.827 H7 N4 H8 111.827
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.118      
2 C 0.118      
3 N -0.110      
4 N -0.110      
5 H -0.013      
6 H 0.005      
7 H -0.013      
8 H 0.005      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.337 1.337
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.877 0.390 0.000
y 0.390 10.908 0.000
z 0.000 0.000 4.849


<r2> (average value of r2) Å2
<r2> 98.196
(<r2>)1/2 9.909