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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: B3LYP/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 B3LYP/TZVP
 hartrees
Energy at 0K-188.113822
Energy at 298.15K-188.117681
HF Energy-188.113822
Nuclear repulsion energy102.241036
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 B3LYP/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 3620 3495 23.90      
2 A 3535 3413 1.81      
3 A 2356 2274 0.52      
4 A 1657 1599 7.35      
5 A 1187 1146 0.38      
6 A 832 803 1.21      
7 A 459 443 76.13      
8 A 447 431 32.48      
9 A 413 399 96.61      
10 A 184 178 28.03      
11 B 3620 3495 22.95      
12 B 3539 3416 7.32      
13 B 1659 1602 32.80      
14 B 1385 1337 132.79      
15 B 1187 1145 0.44      
16 B 493 476 282.89      
17 B 424 410 50.87      
18 B 185 178 29.20      

Unscaled Zero Point Vibrational Energy (zpe) 13590.2 cm-1
Scaled (by 0.9654) Zero Point Vibrational Energy (zpe) 13119.9 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 B3LYP/TZVP
ABC
5.36337 0.12008 0.12007

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 0.603 0.048
C2 -0.003 -0.603 0.048
N3 -0.003 1.953 -0.077
N4 0.003 -1.953 -0.077
H5 -0.357 2.471 0.715
H6 0.833 2.366 -0.467
H7 0.357 -2.471 0.715
H8 -0.833 -2.366 -0.467

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.20601.35562.55882.01612.01583.16573.1271
C21.20602.55881.35563.16573.12712.01612.0158
N31.35562.55883.90561.01051.01074.50884.4152
N42.55881.35563.90564.50884.41521.01051.0107
H52.01613.16571.01054.50881.68064.99395.0024
H62.01583.12711.01074.41521.68065.00245.0166
H73.16572.01614.50881.01054.99395.00241.6806
H83.12712.01584.41521.01075.00245.01661.6806

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 174.695 C1 N3 H5 116.116
C1 N3 H6 116.067 C2 C1 N3 174.695
C2 N4 H7 116.116 C2 N4 H8 116.067
H5 N3 H6 112.510 H7 N4 H8 112.510
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.114      
2 C -0.114      
3 N -0.358      
4 N -0.358      
5 H 0.235      
6 H 0.237      
7 H 0.235      
8 H 0.237      


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 1.226 1.226
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.084 3.519 0.000
y 3.519 -13.405 0.000
z 0.000 0.000 -24.181
Traceless
 xyz
x -5.291 3.519 0.000
y 3.519 10.727 0.000
z 0.000 0.000 -5.436
Polar
3z2-r2-10.873
x2-y2-10.679
xy3.519
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.541 0.141 0.000
y 0.141 9.852 0.000
z 0.000 0.000 3.531


<r2> (average value of r2) Å2
<r2> 97.023
(<r2>)1/2 9.850