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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: B3PW91/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 B3PW91/cc-pVDZ
 hartrees
Energy at 0K-187.977639
Energy at 298.15K-187.981648
HF Energy-187.977639
Nuclear repulsion energy101.685657
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 B3PW91/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 3595 3469 17.01      
2 A 3510 3387 3.21      
3 A 2386 2303 0.27      
4 A 1626 1569 8.29      
5 A 1198 1156 0.01      
6 A 836 807 1.91      
7 A 586 566 117.82      
8 A 408 393 13.33      
9 A 405 390 14.45      
10 A 190 183 22.28      
11 B 3595 3469 16.19      
12 B 3513 3390 4.77      
13 B 1627 1570 18.00      
14 B 1396 1348 105.56      
15 B 1199 1157 0.03      
16 B 651 628 313.37      
17 B 406 392 18.32      
18 B 190 184 23.51      

Unscaled Zero Point Vibrational Energy (zpe) 13658.2 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 13180.2 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 B3PW91/cc-pVDZ
ABC
5.08391 0.11905 0.11904

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.004 0.610 0.042
C2 -0.004 -0.610 0.042
N3 -0.004 1.960 -0.079
N4 0.004 -1.960 -0.079
H5 -0.328 2.459 0.745
H6 0.858 2.360 -0.439
H7 0.328 -2.459 0.745
H8 -0.858 -2.360 -0.439

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22021.35492.57262.00542.00563.16473.1302
C21.22022.57261.35493.16473.13022.00542.0056
N31.35492.57263.91921.01621.01644.50664.4181
N42.57261.35493.91924.50664.41811.01621.0164
H52.00543.16471.01624.50661.67824.96074.9902
H62.00563.13021.01644.41811.67824.99025.0229
H73.16472.00544.50661.01624.96074.99021.6782
H83.13022.00564.41811.01644.99025.02291.6782

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.818 C1 N3 H5 114.752
C1 N3 H6 114.755 C2 C1 N3 174.818
C2 N4 H7 114.752 C2 N4 H8 114.755
H5 N3 H6 111.307 H7 N4 H8 111.307
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.025      
2 C -0.025      
3 N -0.205      
4 N -0.205      
5 H 0.114      
6 H 0.116      
7 H 0.114      
8 H 0.116      


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 1.500 1.500
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.176 4.195 0.000
y 4.195 -13.218 0.000
z 0.000 0.000 -23.343
Traceless
 xyz
x -4.896 4.195 0.000
y 4.195 10.042 0.000
z 0.000 0.000 -5.146
Polar
3z2-r2-10.292
x2-y2-9.958
xy4.195
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.957 0.310 0.000
y 0.310 9.258 0.000
z 0.000 0.000 2.949


<r2> (average value of r2) Å2
<r2> 97.123
(<r2>)1/2 9.855