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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: HF/aug-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 HF/aug-cc-pVDZ
 hartrees
Energy at 0K-186.909856
Energy at 298.15K-186.914214
HF Energy-186.909856
Nuclear repulsion energy102.459971
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/aug-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 3863 3518 36.14      
2 A 3765 3428 2.19      
3 A 2538 2311 0.06      
4 A 1772 1613 10.18      
5 A 1301 1184 1.16      
6 A 863 786 4.79      
7 A 643 586 120.50      
8 A 485 442 12.27      
9 A 378 344 24.63      
10 A 240 218 24.05      
11 B 3863 3518 35.17      
12 B 3765 3429 26.38      
13 B 1773 1614 41.35      
14 B 1412 1286 116.57      
15 B 1300 1184 1.14      
16 B 697 635 284.58      
17 B 490 446 30.46      
18 B 240 218 25.78      

Unscaled Zero Point Vibrational Energy (zpe) 14693.3 cm-1
Scaled (by 0.9106) Zero Point Vibrational Energy (zpe) 13379.8 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/aug-cc-pVDZ
ABC
5.25811 0.12043 0.12042

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 0.597 0.047
C2 -0.001 -0.597 0.047
N3 -0.001 1.949 -0.081
N4 0.001 -1.949 -0.081
H5 -0.333 2.444 0.721
H6 0.848 2.337 -0.437
H7 0.333 -2.444 0.721
H8 -0.848 -2.337 -0.437

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.19491.35752.54961.99361.99393.13273.0926
C21.19492.54961.35753.13273.09261.99361.9939
N31.35752.54963.89780.99880.99904.47794.3828
N42.54961.35753.89784.47794.38280.99880.9990
H51.99363.13270.99884.47791.65664.93304.9456
H61.99393.09260.99904.38281.65664.94564.9714
H73.13271.99364.47790.99884.93304.94561.6566
H83.09261.99394.38280.99904.94564.97141.6566

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.565 C1 N3 H5 114.718
C1 N3 H6 114.731 C2 C1 N3 174.565
C2 N4 H7 114.718 C2 N4 H8 114.731
H5 N3 H6 112.035 H7 N4 H8 112.035
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.171      
2 C 0.171      
3 N -0.201      
4 N -0.201      
5 H 0.014      
6 H 0.017      
7 H 0.014      
8 H 0.017      


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 1.512 1.512
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.090 4.374 0.000
y 4.374 -15.313 0.000
z 0.000 0.000 -24.211
Traceless
 xyz
x -4.328 4.374 0.000
y 4.374 8.837 0.000
z 0.000 0.000 -4.510
Polar
3z2-r2-9.020
x2-y2-8.777
xy4.374
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.461 0.134 0.000
y 0.134 9.005 0.000
z 0.000 0.000 4.455


<r2> (average value of r2) Å2
<r2> 96.858
(<r2>)1/2 9.842