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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: TPSSh/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at TPSSh/6-31G**
 hartrees
Energy at 0K-188.043731
Energy at 298.15K-188.047659
HF Energy-188.043731
Nuclear repulsion energy101.668682
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 TPSSh/6-31G**
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 3595 3446 9.36      
2 A 3506 3361 1.98      
3 A 2369 2271 0.32      
4 A 1664 1595 9.60      
5 A 1197 1147 0.15      
6 A 831 797 2.87      
7 A 565 542 149.37      
8 A 417 400 20.53      
9 A 396 380 7.57      
10 A 181 174 19.71      
11 B 3594 3446 8.78      
12 B 3509 3364 3.66      
13 B 1664 1595 17.10      
14 B 1385 1328 94.96      
15 B 1197 1148 0.18      
16 B 626 600 369.34      
17 B 394 378 16.97      
18 B 182 175 21.04      

Unscaled Zero Point Vibrational Energy (zpe) 13635.5 cm-1
Scaled (by 0.9587) Zero Point Vibrational Energy (zpe) 13072.4 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 TPSSh/6-31G**
ABC
5.15377 0.11885 0.11884

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.004 0.609 0.043
C2 -0.004 -0.609 0.043
N3 -0.004 1.962 -0.078
N4 0.004 -1.962 -0.078
H5 -0.337 2.466 0.736
H6 0.848 2.368 -0.447
H7 0.337 -2.466 0.736
H8 -0.848 -2.368 -0.447

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.21771.35852.57362.01132.01163.16923.1350
C21.21772.57361.35853.16923.13502.01132.0116
N31.35852.57363.92381.01381.01404.51474.4268
N42.57361.35853.92384.51474.42681.01381.0140
H52.01133.16921.01384.51471.67804.97705.0024
H62.01163.13501.01404.42681.67805.00245.0308
H73.16922.01134.51471.01384.97705.00241.6780
H83.13502.01164.42681.01405.00245.03081.6780

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.847 C1 N3 H5 115.193
C1 N3 H6 115.198 C2 C1 N3 174.847
C2 N4 H7 115.193 C2 N4 H8 115.198
H5 N3 H6 111.687 H7 N4 H8 111.687
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.212      
2 C 0.212      
3 N -0.771      
4 N -0.771      
5 H 0.278      
6 H 0.280      
7 H 0.278      
8 H 0.280      


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 1.585 1.585
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.763 0.279 0.000
y 0.279 9.208 0.000
z 0.000 0.000 2.756


<r2> (average value of r2) Å2
<r2> 97.234
(<r2>)1/2 9.861