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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: HF/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 HF/6-31+G**
 hartrees
Energy at 0K-186.895803
Energy at 298.15K-186.900162
HF Energy-186.895803
Nuclear repulsion energy102.655657
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/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 3901 3527 44.46      
2 A 3795 3432 3.36      
3 A 2534 2292 0.19      
4 A 1795 1623 11.59      
5 A 1303 1178 0.08      
6 A 872 789 4.11      
7 A 613 554 160.09      
8 A 498 450 26.46      
9 A 400 362 24.22      
10 A 244 221 28.99      
11 B 3901 3527 43.20      
12 B 3796 3432 37.26      
13 B 1798 1625 56.44      
14 B 1425 1289 123.75      
15 B 1303 1178 0.11      
16 B 657 594 333.83      
17 B 502 454 45.61      
18 B 244 221 30.38      

Unscaled Zero Point Vibrational Energy (zpe) 14790.4 cm-1
Scaled (by 0.9042) Zero Point Vibrational Energy (zpe) 13373.5 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 HF/6-31+G**
ABC
5.34350 0.12082 0.12080

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 0.595 0.042
C2 -0.001 -0.595 0.042
N3 -0.001 1.947 -0.076
N4 0.001 -1.947 -0.076
H5 -0.342 2.443 0.719
H6 0.837 2.343 -0.442
H7 0.342 -2.443 0.719
H8 -0.837 -2.343 -0.442

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.19081.35682.54531.99701.99683.13113.0937
C21.19082.54531.35683.13113.09371.99701.9968
N31.35682.54533.89430.99670.99694.47424.3861
N42.54531.35683.89434.47424.38610.99670.9969
H51.99703.13110.99674.47421.65804.93274.9492
H61.99683.09370.99694.38611.65804.94924.9760
H73.13111.99704.47420.99674.93274.94921.6580
H83.09371.99684.38610.99694.94924.97601.6580

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.016 C1 N3 H5 115.247
C1 N3 H6 115.210 C2 C1 N3 175.016
C2 N4 H7 115.247 C2 N4 H8 115.210
H5 N3 H6 112.534 H7 N4 H8 112.534
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.103      
2 C 0.103      
3 N -0.731      
4 N -0.731      
5 H 0.313      
6 H 0.315      
7 H 0.313      
8 H 0.315      


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 1.577 1.577
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.106 4.454 0.000
y 4.454 -14.766 0.000
z 0.000 0.000 -24.215
Traceless
 xyz
x -4.615 4.454 0.000
y 4.454 9.395 0.000
z 0.000 0.000 -4.780
Polar
3z2-r2-9.559
x2-y2-9.340
xy4.454
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.536 0.108 0.000
y 0.108 8.417 0.000
z 0.000 0.000 3.533


<r2> (average value of r2) Å2
<r2> 96.554
(<r2>)1/2 9.826