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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: mPW1PW91/TZVP

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/TZVP
 hartrees
Energy at 0K-188.059572
Energy at 298.15K-188.063495
HF Energy-188.059572
Nuclear repulsion energy102.531822
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/TZVP
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 3675 3506 28.69      
2 A 3584 3419 2.26      
3 A 2387 2277 0.50      
4 A 1661 1585 7.79      
5 A 1192 1137 0.37      
6 A 846 807 0.99      
7 A 464 443 99.63      
8 A 453 432 2.11      
9 A 417 398 104.46      
10 A 194 185 28.69      
11 B 3675 3506 27.56      
12 B 3588 3423 11.40      
13 B 1665 1588 41.01      
14 B 1412 1347 136.02      
15 B 1191 1137 0.43      
16 B 501 478 274.25      
17 B 432 412 62.15      
18 B 194 186 29.76      

Unscaled Zero Point Vibrational Energy (zpe) 13765.8 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 13132.6 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/TZVP
ABC
5.37063 0.12080 0.12078

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 0.602 0.052
C2 -0.002 -0.602 0.052
N3 -0.002 1.946 -0.080
N4 0.002 -1.946 -0.080
H5 -0.351 2.462 0.713
H6 0.838 2.350 -0.465
H7 0.351 -2.462 0.713
H8 -0.838 -2.350 -0.465

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20461.35002.55162.00512.00483.15423.1126
C21.20462.55161.35003.15423.11262.00512.0048
N31.35002.55163.89181.00811.00844.49254.3934
N42.55161.35003.89184.49254.39341.00811.0084
H52.00513.15421.00814.49251.67724.97384.9778
H62.00483.11261.00844.39341.67724.97784.9897
H73.15422.00514.49251.00814.97384.97781.6772
H83.11262.00484.39341.00844.97784.98971.6772

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.407 C1 N3 H5 115.727
C1 N3 H6 115.685 C2 C1 N3 174.407
C2 N4 H7 115.727 C2 N4 H8 115.685
H5 N3 H6 112.554 H7 N4 H8 112.554
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.158      
2 C -0.158      
3 N -0.328      
4 N -0.328      
5 H 0.242      
6 H 0.243      
7 H 0.242      
8 H 0.243      


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 1.245 1.245
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.831 3.573 0.000
y 3.573 -13.019 0.000
z 0.000 0.000 -23.921
Traceless
 xyz
x -5.361 3.573 0.000
y 3.573 10.858 0.000
z 0.000 0.000 -5.496
Polar
3z2-r2-10.993
x2-y2-10.813
xy3.573
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.469 0.132 0.000
y 0.132 9.663 0.000
z 0.000 0.000 3.461


<r2> (average value of r2) Å2
<r2> 96.324
(<r2>)1/2 9.814