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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: PBE1PBE/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 PBE1PBE/aug-cc-pVDZ
 hartrees
Energy at 0K-187.848774
Energy at 298.15K-187.852638
HF Energy-187.848774
Nuclear repulsion energy101.940539
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 PBE1PBE/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 3655 3515 28.44      
2 A 3560 3423 0.90      
3 A 2395 2303 0.14      
4 A 1632 1569 6.97      
5 A 1181 1136 0.17      
6 A 841 808 1.12      
7 A 491 473 125.21      
8 A 422 406 9.07      
9 A 401 386 19.54      
10 A 178 171 22.62      
11 B 3655 3515 27.61      
12 B 3563 3426 5.99      
13 B 1635 1572 32.03      
14 B 1404 1350 130.80      
15 B 1181 1136 0.15      
16 B 550 529 263.62      
17 B 404 388 21.57      
18 B 179 172 24.23      

Unscaled Zero Point Vibrational Energy (zpe) 13663.4 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 13138.7 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 PBE1PBE/aug-cc-pVDZ
ABC
5.23934 0.11944 0.11943

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/aug-cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.608 0.044
C2 -0.005 -0.608 0.044
N3 -0.005 1.957 -0.078
N4 0.005 -1.957 -0.078
H5 -0.344 2.463 0.731
H6 0.843 2.365 -0.453
H7 0.344 -2.463 0.731
H8 -0.843 -2.365 -0.453

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21671.35442.56842.00842.00883.16563.1315
C21.21672.56841.35443.16563.13152.00842.0088
N31.35442.56843.91441.01241.01264.50724.4187
N42.56841.35443.91444.50724.41871.01241.0126
H52.00843.16561.01244.50721.67934.97424.9961
H62.00883.13151.01264.41871.67934.99615.0214
H73.16562.00844.50721.01244.97424.99611.6793
H83.13152.00884.41871.01264.99615.02141.6793

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.768 C1 N3 H5 115.353
C1 N3 H6 115.382 C2 C1 N3 174.768
C2 N4 H7 115.353 C2 N4 H8 115.382
H5 N3 H6 112.051 H7 N4 H8 112.051
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.149      
2 C 0.149      
3 N -0.130      
4 N -0.130      
5 H -0.016      
6 H -0.003      
7 H -0.016      
8 H -0.003      


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 1.282 1.282
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.952 3.946 0.000
y 3.946 -14.328 0.000
z 0.000 0.000 -24.199
Traceless
 xyz
x -4.689 3.946 0.000
y 3.946 9.747 0.000
z 0.000 0.000 -5.059
Polar
3z2-r2-10.117
x2-y2-9.624
xy3.946
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.764 0.289 0.000
y 0.289 10.600 0.000
z 0.000 0.000 4.747


<r2> (average value of r2) Å2
<r2> 97.526
(<r2>)1/2 9.876