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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: TPSSh/TZVP

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/TZVP
 hartrees
Energy at 0K-188.111241
Energy at 298.15K-188.115118
HF Energy-188.111241
Nuclear repulsion energy102.077958
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/TZVP
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 3597 3466 18.42      
2 A 3513 3385 1.76      
3 A 2351 2266 0.60      
4 A 1662 1601 9.16      
5 A 1192 1149 0.14      
6 A 828 798 2.14      
7 A 499 481 165.75      
8 A 441 425 9.65      
9 A 405 390 10.84      
10 A 174 168 26.49      
11 B 3596 3466 17.42      
12 B 3516 3389 3.83      
13 B 1663 1603 25.64      
14 B 1378 1328 123.27      
15 B 1192 1148 0.19      
16 B 559 538 323.10      
17 B 405 391 16.70      
18 B 175 169 28.22      

Unscaled Zero Point Vibrational Energy (zpe) 13572.8 cm-1
Scaled (by 0.9637) Zero Point Vibrational Energy (zpe) 13080.1 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/TZVP
ABC
5.26091 0.11980 0.11979

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 0.605 0.058
C2 -0.002 -0.605 0.058
N3 -0.002 1.952 -0.084
N4 0.002 -1.952 -0.084
H5 -0.348 2.476 0.710
H6 0.843 2.354 -0.470
H7 0.348 -2.476 0.710
H8 -0.843 -2.354 -0.470

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20931.35542.56112.01182.01193.16733.1223
C21.20932.56111.35543.16733.12232.01182.0119
N31.35542.56113.90501.01191.01214.51244.4050
N42.56111.35543.90504.51244.40501.01191.0121
H52.01183.16731.01194.51241.68054.99994.9965
H62.01193.12231.01214.40501.68054.99655.0015
H73.16732.01184.51241.01194.99994.99651.6805
H83.12232.01194.40501.01214.99655.00151.6805

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.937 C1 N3 H5 115.622
C1 N3 H6 115.612 C2 C1 N3 173.937
C2 N4 H7 115.622 C2 N4 H8 115.612
H5 N3 H6 112.255 H7 N4 H8 112.255
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.152      
2 C -0.152      
3 N -0.320      
4 N -0.320      
5 H 0.235      
6 H 0.237      
7 H 0.235      
8 H 0.237      


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 1.350 1.350
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 3.550 0.161 0.000
y 0.161 9.934 0.000
z 0.000 0.000 3.537


<r2> (average value of r2) Å2
<r2> 97.055
(<r2>)1/2 9.852