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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: B3LYP/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B3LYP/6-31+G**
 hartrees
Energy at 0K-188.056706
Energy at 298.15K-188.060505
HF Energy-188.056706
Nuclear repulsion energy101.710983
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 B3LYP/6-31+G**
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 3639 3508 32.09      
2 A 3545 3418 1.12      
3 A 2355 2270 0.34      
4 A 1653 1594 8.46      
5 A 1181 1138 0.26      
6 A 832 802 1.28      
7 A 470 453 175.90      
8 A 439 423 1.56      
9 A 403 389 27.39      
10 A 172 166 27.52      
11 B 3638 3508 30.94      
12 B 3548 3421 9.52      
13 B 1656 1597 35.34      
14 B 1382 1333 144.30      
15 B 1180 1138 0.29      
16 B 518 500 308.92      
17 B 404 389 24.37      
18 B 173 167 28.50      

Unscaled Zero Point Vibrational Energy (zpe) 13594.3 cm-1
Scaled (by 0.9642) Zero Point Vibrational Energy (zpe) 13107.6 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 B3LYP/6-31+G**
ABC
5.30519 0.11876 0.11875

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.608 0.031
C2 -0.006 -0.608 0.031
N3 -0.006 1.966 -0.067
N4 0.006 -1.966 -0.067
H5 -0.358 2.469 0.739
H6 0.829 2.392 -0.453
H7 0.358 -2.469 0.739
H8 -0.829 -2.392 -0.453

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21561.36152.57532.02382.02353.17633.1507
C21.21562.57531.36153.17633.15072.02382.0235
N31.36152.57533.93131.01321.01344.52164.4511
N42.57531.36153.93134.52164.45111.01321.0134
H52.02383.17631.01324.52161.68384.98895.0263
H62.02353.15071.01344.45111.68385.02635.0624
H73.17632.02384.52161.01324.98895.02631.6838
H83.15072.02354.45111.01345.02635.06241.6838

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.743 C1 N3 H5 116.137
C1 N3 H6 116.095 C2 C1 N3 175.743
C2 N4 H7 116.137 C2 N4 H8 116.095
H5 N3 H6 112.368 H7 N4 H8 112.368
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.173      
2 C 0.173      
3 N -0.777      
4 N -0.777      
5 H 0.301      
6 H 0.303      
7 H 0.301      
8 H 0.303      


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 1.331 1.331
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.344 3.793 0.000
y 3.793 -13.749 0.000
z 0.000 0.000 -24.422
Traceless
 xyz
x -5.258 3.793 0.000
y 3.793 10.634 0.000
z 0.000 0.000 -5.376
Polar
3z2-r2-10.752
x2-y2-10.595
xy3.793
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.877 0.118 0.000
y 0.118 9.984 0.000
z 0.000 0.000 3.869


<r2> (average value of r2) Å2
<r2> 98.076
(<r2>)1/2 9.903