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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: LSDA/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 LSDA/6-31+G**
 hartrees
Energy at 0K-187.031002
Energy at 298.15K-187.034144
HF Energy-187.031002
Nuclear repulsion energy102.010437
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 LSDA/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 3580 3526 44.50      
2 A 3485 3433 0.52      
3 A 2334 2299 0.12      
4 A 1575 1551 2.25      
5 A 1104 1087 3.19      
6 A 855 843 0.03      
7 A 521 513 6.48      
8 A 403 397 0.63      
9 A 206 203 235.33      
10 A 132 130 38.21      
11 B 3580 3526 43.97      
12 B 3492 3440 12.15      
13 B 1591 1567 72.31      
14 B 1446 1425 132.02      
15 B 1103 1087 3.19      
16 B 402 396 0.49      
17 B 243 239 286.37      
18 B 132 130 34.45      

Unscaled Zero Point Vibrational Energy (zpe) 13091.9 cm-1
Scaled (by 0.985) Zero Point Vibrational Energy (zpe) 12895.5 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 LSDA/6-31+G**
ABC
5.48150 0.11959 0.11959

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.008 0.611 0.013
C2 -0.008 -0.611 0.013
N3 -0.008 1.959 -0.056
N4 0.008 -1.959 -0.056
H5 -0.371 2.451 0.762
H6 0.823 2.403 -0.449
H7 0.371 -2.451 0.762
H8 -0.823 -2.403 -0.449

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22241.34942.57072.02262.02203.17343.1610
C21.22242.57071.34943.17343.16102.02262.0220
N31.34942.57073.91741.02111.02134.50114.4549
N42.57071.34943.91744.50114.45491.02111.0213
H52.02263.17341.02114.50111.70094.95835.0237
H62.02203.16101.02134.45491.70095.02375.0807
H73.17342.02264.50111.02114.95835.02371.7009
H83.16102.02204.45491.02135.02375.08071.7009

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 176.709 C1 N3 H5 116.448
C1 N3 H6 116.377 C2 C1 N3 176.709
C2 N4 H7 116.448 C2 N4 H8 116.377
H5 N3 H6 112.779 H7 N4 H8 112.779
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.177      
2 C 0.177      
3 N -0.821      
4 N -0.821      
5 H 0.321      
6 H 0.322      
7 H 0.321      
8 H 0.322      


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 0.724 0.724
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.451 2.175 0.000
y 2.175 -11.537 0.000
z 0.000 0.000 -24.512
Traceless
 xyz
x -6.427 2.175 0.000
y 2.175 12.945 0.000
z 0.000 0.000 -6.518
Polar
3z2-r2-13.036
x2-y2-12.914
xy2.175
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.857 0.156 0.000
y 0.156 10.806 0.000
z 0.000 0.000 3.851


<r2> (average value of r2) Å2
<r2> 97.405
(<r2>)1/2 9.869