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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: PBE1PBE/6-311G*

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/6-311G*
 hartrees
Energy at 0K-187.857213
Energy at 298.15K-187.861309
HF Energy-187.857213
Nuclear repulsion energy102.343469
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/6-311G*
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 3658 3506 13.47      
2 A 3574 3425 2.33      
3 A 2391 2291 0.38      
4 A 1704 1634 10.99      
5 A 1221 1171 0.32      
6 A 843 808 1.68      
7 A 531 509 170.96      
8 A 448 430 7.61      
9 A 443 424 25.73      
10 A 207 199 26.16      
11 B 3658 3506 12.81      
12 B 3577 3429 3.42      
13 B 1707 1636 36.06      
14 B 1412 1353 113.08      
15 B 1221 1171 0.42      
16 B 589 564 361.59      
17 B 446 427 27.27      
18 B 208 199 27.95      

Unscaled Zero Point Vibrational Energy (zpe) 13918.7 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 13341.1 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/6-311G*
ABC
5.27688 0.12043 0.12041

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 0.604 0.057
C2 -0.002 -0.604 0.057
N3 -0.002 1.947 -0.085
N4 0.002 -1.947 -0.085
H5 -0.341 2.465 0.712
H6 0.847 2.344 -0.461
H7 0.341 -2.465 0.712
H8 -0.847 -2.344 -0.461

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20741.35082.55462.00272.00263.15613.1105
C21.20742.55461.35083.15613.11052.00272.0026
N31.35082.55463.89391.00931.00954.49654.3892
N42.55461.35083.89394.49654.38921.00931.0095
H52.00273.15611.00934.49651.67374.97704.9755
H62.00263.11051.00954.38921.67374.97554.9840
H73.15612.00274.49651.00934.97704.97551.6737
H83.11052.00264.38921.00954.97554.98401.6737

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 173.951 C1 N3 H5 115.353
C1 N3 H6 115.327 C2 C1 N3 173.951
C2 N4 H7 115.353 C2 N4 H8 115.327
H5 N3 H6 112.004 H7 N4 H8 112.004
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.259      
2 C 0.259      
3 N -0.942      
4 N -0.942      
5 H 0.341      
6 H 0.342      
7 H 0.341      
8 H 0.342      


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 1.476 1.476
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.573 4.132 0.000
y 4.132 -12.873 0.000
z 0.000 0.000 -23.704
Traceless
 xyz
x -5.285 4.132 0.000
y 4.132 10.765 0.000
z 0.000 0.000 -5.481
Polar
3z2-r2-10.961
x2-y2-10.700
xy4.132
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.036 0.208 0.000
y 0.208 9.159 0.000
z 0.000 0.000 3.028


<r2> (average value of r2) Å2
<r2> 96.366
(<r2>)1/2 9.817