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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: mPW1PW91/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 mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-188.020066
Energy at 298.15K-188.023923
HF Energy-188.020066
Nuclear repulsion energy101.980494
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 mPW1PW91/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3658 3506 27.55      
2 A 3563 3415 0.89      
3 A 2394 2294 0.14      
4 A 1637 1569 6.89      
5 A 1184 1135 0.17      
6 A 840 805 1.14      
7 A 490 469 126.24      
8 A 423 405 8.63      
9 A 401 384 19.69      
10 A 177 169 22.52      
11 B 3658 3505 26.77      
12 B 3566 3418 5.61      
13 B 1640 1571 30.89      
14 B 1402 1343 130.64      
15 B 1184 1134 0.15      
16 B 548 525 264.31      
17 B 403 386 21.58      
18 B 177 170 24.20      

Unscaled Zero Point Vibrational Energy (zpe) 13671.5 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 13101.4 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 mPW1PW91/aug-cc-pVDZ
ABC
5.25378 0.11951 0.11949

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.608 0.045
C2 -0.005 -0.608 0.045
N3 -0.005 1.957 -0.078
N4 0.005 -1.957 -0.078
H5 -0.345 2.463 0.729
H6 0.842 2.364 -0.454
H7 0.345 -2.463 0.729
H8 -0.842 -2.364 -0.454

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21571.35442.56742.00812.00853.16473.1302
C21.21572.56741.35443.16473.13022.00812.0085
N31.35442.56743.91321.01151.01174.50654.4171
N42.56741.35443.91324.50654.41711.01151.0117
H52.00813.16471.01154.50651.67794.97474.9950
H62.00853.13021.01174.41711.67794.99505.0191
H73.16472.00814.50651.01154.97474.99501.6779
H83.13022.00854.41711.01174.99505.01911.6779

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.720 C1 N3 H5 115.387
C1 N3 H6 115.416 C2 C1 N3 174.720
C2 N4 H7 115.387 C2 N4 H8 115.416
H5 N3 H6 112.056 H7 N4 H8 112.056
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.130      
2 C 0.130      
3 N -0.120      
4 N -0.120      
5 H -0.012      
6 H 0.001      
7 H -0.012      
8 H 0.001      


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 1.276 1.276
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.901 3.926 0.000
y 3.926 -14.307 0.000
z 0.000 0.000 -24.144
Traceless
 xyz
x -4.676 3.926 0.000
y 3.926 9.716 0.000
z 0.000 0.000 -5.040
Polar
3z2-r2-10.081
x2-y2-9.594
xy3.926
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.753 0.286 0.000
y 0.286 10.546 0.000
z 0.000 0.000 4.736


<r2> (average value of r2) Å2
<r2> 97.452
(<r2>)1/2 9.872