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: B97D3/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B97D3/6-311+G(3df,2p)
 hartrees
Energy at 0K-187.993483
Energy at 298.15K-187.997293
HF Energy-187.993483
Nuclear repulsion energy101.921059
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 B97D3/6-311+G(3df,2p)
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 3535 3489 18.53      
2 A 3457 3412 0.31      
3 A 2302 2272 0.30      
4 A 1620 1599 6.51      
5 A 1166 1151 0.07      
6 A 814 803 2.19      
7 A 496 490 122.41      
8 A 424 418 9.60      
9 A 396 391 12.79      
10 A 168 166 22.87      
11 B 3534 3488 17.67      
12 B 3461 3416 0.77      
13 B 1620 1599 17.28      
14 B 1357 1339 126.14      
15 B 1166 1151 0.07      
16 B 554 547 260.49      
17 B 398 393 15.76      
18 B 169 167 24.92      

Unscaled Zero Point Vibrational Energy (zpe) 13317.9 cm-1
Scaled (by 0.987) Zero Point Vibrational Energy (zpe) 13144.8 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 B97D3/6-311+G(3df,2p)
ABC
5.25328 0.11942 0.11941

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-311+G(3df,2p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.013 0.607 0.004
C2 -0.013 -0.607 0.004
N3 -0.013 1.955 -0.051
N4 0.013 -1.955 -0.051
H5 -0.374 2.436 0.764
H6 0.811 2.409 -0.427
H7 0.374 -2.436 0.764
H8 -0.811 -2.409 -0.427

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21441.34942.56272.01802.01673.15713.1557
C21.21442.56271.34943.15713.15572.01802.0167
N31.34942.56273.91031.01281.01304.48274.4518
N42.56271.34943.91034.48274.45181.01281.0130
H52.01803.15711.01284.48271.68024.92885.0078
H62.01673.15571.01304.45181.68025.00785.0827
H73.15712.01804.48271.01284.92885.00781.6802
H83.15572.01674.45181.01305.00785.08271.6802

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.207 C1 N3 H5 115.691
C1 N3 H6 115.713 C2 C1 N3 174.207
C2 N4 H7 115.691 C2 N4 H8 115.713
H5 N3 H6 111.899 H7 N4 H8 111.899
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.534      
2 C 0.534      
3 N -0.930      
4 N -0.930      
5 H 0.197      
6 H 0.199      
7 H 0.197      
8 H 0.199      


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 1.208 1.208
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.117 3.609 0.000
y 3.609 -14.129 0.000
z 0.000 0.000 -24.228
Traceless
 xyz
x -4.938 3.609 0.000
y 3.609 10.044 0.000
z 0.000 0.000 -5.105
Polar
3z2-r2-10.211
x2-y2-9.988
xy3.609
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.863 0.146 0.000
y 0.146 10.894 0.000
z 0.000 0.000 4.854


<r2> (average value of r2) Å2
<r2> 97.579
(<r2>)1/2 9.878