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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: B97D3/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B97D3/aug-cc-pVTZ
 hartrees
Energy at 0K-187.998536
Energy at 298.15K-188.002305
HF Energy-187.998536
Nuclear repulsion energy101.923154
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 B97D3/aug-cc-pVTZ
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 3531 3477 16.98      
2 A 3452 3400 0.23      
3 A 2303 2267 0.35      
4 A 1623 1598 5.91      
5 A 1172 1154 0.08      
6 A 813 800 2.28      
7 A 502 494 119.92      
8 A 423 416 11.38      
9 A 385 379 10.32      
10 A 159 156 21.99      
11 B 3530 3476 16.34      
12 B 3456 3404 1.00      
13 B 1623 1598 14.56      
14 B 1354 1333 125.91      
15 B 1172 1154 0.10      
16 B 561 552 257.11      
17 B 386 380 14.58      
18 B 159 156 23.71      

Unscaled Zero Point Vibrational Energy (zpe) 13300.6 cm-1
Scaled (by 0.9847) Zero Point Vibrational Energy (zpe) 13097.1 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 B97D3/aug-cc-pVTZ
ABC
5.24994 0.11941 0.11940

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/aug-cc-pVTZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 0.606 0.053
C2 -0.003 -0.606 0.053
N3 -0.003 1.956 -0.082
N4 0.003 -1.956 -0.082
H5 -0.346 2.474 0.717
H6 0.843 2.363 -0.461
H7 0.346 -2.474 0.717
H8 -0.843 -2.363 -0.461

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21231.35672.56582.01322.01363.16973.1296
C21.21232.56581.35673.16973.12962.01322.0136
N31.35672.56583.91231.01201.01224.51514.4162
N42.56581.35673.91234.51514.41621.01201.0122
H52.01323.16971.01204.51511.67744.99615.0031
H62.01363.12961.01224.41621.67745.00315.0174
H73.16972.01324.51511.01204.99615.00311.6774
H83.12962.01364.41621.01225.00315.01741.6774

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.295 C1 N3 H5 115.637
C1 N3 H6 115.662 C2 C1 N3 174.295
C2 N4 H7 115.637 C2 N4 H8 115.662
H5 N3 H6 111.917 H7 N4 H8 111.917
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.202      
2 C 0.202      
3 N -0.386      
4 N -0.386      
5 H 0.091      
6 H 0.094      
7 H 0.091      
8 H 0.094      


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 1.202 1.202
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.074 3.594 0.000
y 3.594 -14.366 0.000
z 0.000 0.000 -24.193
Traceless
 xyz
x -4.795 3.594 0.000
y 3.594 9.768 0.000
z 0.000 0.000 -4.973
Polar
3z2-r2-9.945
x2-y2-9.708
xy3.594
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.043 0.172 0.000
y 0.172 11.289 0.000
z 0.000 0.000 5.034


<r2> (average value of r2) Å2
<r2> 97.604
(<r2>)1/2 9.879