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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: PBE1PBE/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 PBE1PBE/aug-cc-pVTZ
 hartrees
Energy at 0K-187.894981
Energy at 298.15K-187.898982
HF Energy-187.894981
Nuclear repulsion energy102.465050
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-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 3656 3516 31.12      
2 A 3569 3432 0.94      
3 A 2381 2290 0.23      
4 A 1649 1585 6.49      
5 A 1191 1145 0.13      
6 A 841 809 1.50      
7 A 500 481 115.52      
8 A 430 413 22.08      
9 A 427 411 17.86      
10 A 201 193 24.64      
11 B 3656 3515 30.22      
12 B 3572 3435 8.07      
13 B 1650 1587 31.46      
14 B 1400 1346 138.70      
15 B 1191 1145 0.14      
16 B 552 531 253.54      
17 B 435 418 29.86      
18 B 201 193 25.83      

Unscaled Zero Point Vibrational Energy (zpe) 13750.9 cm-1
Scaled (by 0.9615) Zero Point Vibrational Energy (zpe) 13221.5 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-pVTZ
ABC
5.30523 0.12070 0.12069

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 0.602 0.053
C2 -0.002 -0.602 0.053
N3 -0.002 1.946 -0.082
N4 0.002 -1.946 -0.082
H5 -0.346 2.459 0.715
H6 0.843 2.346 -0.459
H7 0.346 -2.459 0.715
H8 -0.843 -2.346 -0.459

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20421.35042.55152.00232.00263.15113.1094
C21.20422.55151.35043.15113.10942.00232.0026
N31.35042.55153.89161.00831.00854.49034.3897
N42.55151.35043.89164.49034.38971.00831.0085
H52.00233.15111.00834.49031.67444.96744.9718
H62.00263.10941.00854.38971.67444.97184.9861
H73.15112.00234.49031.00834.96744.97181.6744
H83.10942.00264.38971.00854.97184.98611.6744

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.259 C1 N3 H5 115.417
C1 N3 H6 115.432 C2 C1 N3 174.259
C2 N4 H7 115.417 C2 N4 H8 115.432
H5 N3 H6 112.242 H7 N4 H8 112.242
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.159      
2 C 0.159      
3 N -0.421      
4 N -0.421      
5 H 0.129      
6 H 0.133      
7 H 0.129      
8 H 0.133      


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 1.216 1.216
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.996 3.604 0.000
y 3.604 -14.068 0.000
z 0.000 0.000 -24.099
Traceless
 xyz
x -4.912 3.604 0.000
y 3.604 9.979 0.000
z 0.000 0.000 -5.067
Polar
3z2-r2-10.135
x2-y2-9.927
xy3.604
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.807 0.140 0.000
y 0.140 10.523 0.000
z 0.000 0.000 4.801


<r2> (average value of r2) Å2
<r2> 96.616
(<r2>)1/2 9.829