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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: LSDA/6-311G*

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/6-311G*
 hartrees
Energy at 0K-187.060254
Energy at 298.15K-187.063853
HF Energy-187.060254
Nuclear repulsion energy102.513921
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/6-311G*
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 3536 3479 16.00      
2 A 3456 3400 1.16      
3 A 2339 2301 0.36      
4 A 1620 1594 3.81      
5 A 1141 1123 3.01      
6 A 853 839 0.09      
7 A 532 523 11.50      
8 A 439 431 1.04      
9 A 289 284 241.86      
10 A 176 173 28.03      
11 B 3536 3478 15.54      
12 B 3464 3407 1.77      
13 B 1631 1604 47.88      
14 B 1455 1431 104.31      
15 B 1141 1122 3.16      
16 B 440 433 4.60      
17 B 337 332 330.96      
18 B 176 173 28.95      

Unscaled Zero Point Vibrational Energy (zpe) 13279.5 cm-1
Scaled (by 0.9837) Zero Point Vibrational Energy (zpe) 13063.0 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/6-311G*
ABC
5.43909 0.12101 0.12100

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/6-311G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.606 0.036
C2 -0.005 -0.606 0.036
N3 -0.005 1.945 -0.070
N4 0.005 -1.945 -0.070
H5 -0.362 2.457 0.736
H6 0.834 2.370 -0.464
H7 0.362 -2.457 0.736
H8 -0.834 -2.370 -0.464

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21251.34292.55332.01242.01193.16253.1321
C21.21252.55331.34293.16253.13212.01242.0119
N31.34292.55333.88981.01921.01954.49024.4113
N42.55331.34293.88984.49024.41131.01921.0195
H52.01243.16251.01924.49021.69594.96754.9962
H62.01193.13211.01954.41131.69594.99625.0246
H73.16252.01244.49021.01924.96754.99621.6959
H83.13212.01194.41131.01954.99625.02461.6959

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.386 C1 N3 H5 116.179
C1 N3 H6 116.114 C2 C1 N3 175.386
C2 N4 H7 116.179 C2 N4 H8 116.114
H5 N3 H6 112.581 H7 N4 H8 112.581
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.224      
2 C 0.224      
3 N -0.919      
4 N -0.919      
5 H 0.347      
6 H 0.348      
7 H 0.347      
8 H 0.348      


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 0.936 0.936
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.838 2.651 0.000
y 2.651 -10.882 0.000
z 0.000 0.000 -23.897
Traceless
 xyz
x -6.449 2.651 0.000
y 2.651 12.986 0.000
z 0.000 0.000 -6.537
Polar
3z2-r2-13.074
x2-y2-12.956
xy2.651
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.033 0.151 0.000
y 0.151 10.028 0.000
z 0.000 0.000 3.028


<r2> (average value of r2) Å2
<r2> 96.013
(<r2>)1/2 9.799