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: HF/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at HF/daug-cc-pVTZ
 hartrees
Energy at 0K-186.956756
Energy at 298.15K-186.961159
HF Energy-186.956756
Nuclear repulsion energy103.005549
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 HF/daug-cc-pVTZ
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 3861 3493 38.45      
2 A 3768 3409 2.12      
3 A 2525 2284 0.10      
4 A 1789 1618 9.69      
5 A 1307 1182 1.08      
6 A 864 782 5.14      
7 A 636 575 117.70      
8 A 512 463 21.20      
9 A 384 347 22.11      
10 A 249 225 25.44      
11 B 3861 3493 37.76      
12 B 3769 3409 29.97      
13 B 1790 1619 41.89      
14 B 1410 1275 124.55      
15 B 1307 1182 1.10      
16 B 684 619 274.84      
17 B 518 469 42.93      
18 B 249 225 26.65      

Unscaled Zero Point Vibrational Energy (zpe) 14741.4 cm-1
Scaled (by 0.9046) Zero Point Vibrational Energy (zpe) 13335.1 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 HF/daug-cc-pVTZ
ABC
5.34054 0.12172 0.12171

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/daug-cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.592 -0.006
C2 -0.007 -0.592 -0.006
N3 -0.007 1.943 -0.048
N4 0.007 -1.943 -0.048
H5 -0.342 2.390 0.773
H6 0.823 2.363 -0.399
H7 0.342 -2.390 0.773
H8 -0.823 -2.363 -0.399

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.18341.35202.53501.99071.98963.10003.0939
C21.18342.53501.35203.10003.09391.99071.9896
N31.35202.53503.88600.99370.99384.42394.3966
N42.53501.35203.88604.42394.39660.99370.9938
H51.99073.10000.99374.42391.65334.82884.9190
H61.98963.09390.99384.39661.65334.91905.0042
H73.10001.99074.42390.99374.82884.91901.6533
H83.09391.98964.39660.99384.91905.00421.6533

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 177.843 C1 N3 H5 115.281
C1 N3 H6 115.165 C2 C1 N3 177.843
C2 N4 H7 115.281 C2 N4 H8 115.165
H5 N3 H6 112.577 H7 N4 H8 112.577
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.072      
2 C -0.072      
3 N -0.446      
4 N -0.446      
5 H 0.256      
6 H 0.263      
7 H 0.256      
8 H 0.263      


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 1.443 1.443
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.934 4.166 0.000
y 4.166 -15.134 0.000
z 0.000 0.000 -24.076
Traceless
 xyz
x -4.330 4.166 0.000
y 4.166 8.871 0.000
z 0.000 0.000 -4.542
Polar
3z2-r2-9.083
x2-y2-8.801
xy4.166
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.516 0.119 0.000
y 0.119 8.935 0.000
z 0.000 0.000 4.513


<r2> (average value of r2) Å2
<r2> 95.928
(<r2>)1/2 9.794