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: B1B95/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 B1B95/aug-cc-pVDZ
 hartrees
Energy at 0K-187.986129
Energy at 298.15K-187.990000
HF Energy-187.986129
Nuclear repulsion energy102.061759
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 B1B95/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 3665 3510 28.24      
2 A 3569 3418 0.90      
3 A 2398 2297 0.14      
4 A 1633 1564 6.86      
5 A 1180 1130 0.15      
6 A 840 804 1.06      
7 A 490 469 126.14      
8 A 423 405 8.88      
9 A 402 385 18.71      
10 A 181 173 22.20      
11 B 3664 3510 27.36      
12 B 3571 3421 6.78      
13 B 1636 1567 32.39      
14 B 1401 1342 134.42      
15 B 1180 1130 0.12      
16 B 547 524 263.54      
17 B 405 388 21.34      
18 B 182 175 23.55      

Unscaled Zero Point Vibrational Energy (zpe) 13682.1 cm-1
Scaled (by 0.9579) Zero Point Vibrational Energy (zpe) 13106.1 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 B1B95/aug-cc-pVDZ
ABC
5.26415 0.11969 0.11967

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/aug-cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.004 0.607 0.047
C2 -0.004 -0.607 0.047
N3 -0.004 1.955 -0.079
N4 0.004 -1.955 -0.079
H5 -0.343 2.462 0.727
H6 0.842 2.360 -0.453
H7 0.343 -2.462 0.727
H8 -0.842 -2.360 -0.453

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21451.35342.56512.00582.00633.16183.1262
C21.21452.56511.35343.16183.12622.00582.0063
N31.35342.56513.90961.01041.01064.50304.4117
N42.56511.35343.90964.50304.41171.01041.0106
H52.00583.16181.01044.50301.67564.97154.9896
H62.00633.12621.01064.41171.67564.98965.0122
H73.16182.00584.50301.01044.97154.98961.6756
H83.12622.00634.41171.01064.98965.01221.6756

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.621 C1 N3 H5 115.341
C1 N3 H6 115.369 C2 C1 N3 174.621
C2 N4 H7 115.341 C2 N4 H8 115.369
H5 N3 H6 112.015 H7 N4 H8 112.015
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.095      
2 C 0.095      
3 N -0.026      
4 N -0.026      
5 H -0.041      
6 H -0.028      
7 H -0.041      
8 H -0.028      


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 1.275 1.275
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.864 3.912 0.000
y 3.912 -14.389 0.000
z 0.000 0.000 -24.104
Traceless
 xyz
x -4.618 3.912 0.000
y 3.912 9.595 0.000
z 0.000 0.000 -4.977
Polar
3z2-r2-9.955
x2-y2-9.475
xy3.912
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.727 0.287 0.000
y 0.287 10.543 0.000
z 0.000 0.000 4.710


<r2> (average value of r2) Å2
<r2> 97.322
(<r2>)1/2 9.865