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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: LSDA/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 LSDA/aug-cc-pVTZ
 hartrees
Energy at 0K-187.101359
Energy at 298.15K-187.104910
HF Energy-187.101359
Nuclear repulsion energy102.589506
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 LSDA/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 3544 3511 34.58      
2 A 3460 3427 0.45      
3 A 2328 2307 0.21      
4 A 1566 1552 2.58      
5 A 1114 1104 0.20      
6 A 849 841 0.16      
7 A 495 490 8.26      
8 A 426 422 0.11      
9 A 296 293 171.61      
10 A 170 168 26.60      
11 B 3544 3511 34.06      
12 B 3466 3433 4.18      
13 B 1576 1561 51.72      
14 B 1434 1420 131.47      
15 B 1114 1103 0.23      
16 B 427 423 1.52      
17 B 339 336 239.60      
18 B 170 168 27.19      

Unscaled Zero Point Vibrational Energy (zpe) 13158.6 cm-1
Scaled (by 0.9906) Zero Point Vibrational Energy (zpe) 13034.9 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 LSDA/aug-cc-pVTZ
ABC
5.43233 0.12118 0.12118

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.605 0.033
C2 -0.005 -0.605 0.033
N3 -0.005 1.944 -0.068
N4 0.005 -1.944 -0.068
H5 -0.363 2.451 0.739
H6 0.832 2.370 -0.460
H7 0.363 -2.451 0.739
H8 -0.832 -2.370 -0.460

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20961.34322.55092.01102.01103.15703.1298
C21.20962.55091.34323.15703.12982.01102.0110
N31.34322.55093.88831.01791.01814.48414.4105
N42.55091.34323.88834.48414.41051.01791.0181
H52.01103.15701.01794.48411.69464.95624.9906
H62.01103.12981.01814.41051.69464.99065.0245
H73.15702.01104.48411.01794.95624.99061.6946
H83.12982.01104.41051.01814.99065.02451.6946

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 175.599 C1 N3 H5 116.118
C1 N3 H6 116.103 C2 C1 N3 175.599
C2 N4 H7 116.118 C2 N4 H8 116.103
H5 N3 H6 112.675 H7 N4 H8 112.675
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.221      
2 C 0.221      
3 N -0.436      
4 N -0.436      
5 H 0.106      
6 H 0.109      
7 H 0.106      
8 H 0.109      


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 0.800 0.800
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.318 2.411 0.000
y 2.411 -12.799 0.000
z 0.000 0.000 -24.373
Traceless
 xyz
x -5.732 2.411 0.000
y 2.411 11.547 0.000
z 0.000 0.000 -5.815
Polar
3z2-r2-11.629
x2-y2-11.519
xy2.411
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.019 0.115 0.000
y 0.115 11.688 0.000
z 0.000 0.000 5.015


<r2> (average value of r2) Å2
<r2> 96.466
(<r2>)1/2 9.822