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All results from a given calculation for NH2CCNH2 (Diaminoacetylene)

using model chemistry: LSDA/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 LSDA/6-31G**
 hartrees
Energy at 0K-187.015779
Energy at 298.15K-187.019401
HF Energy-187.015779
Nuclear repulsion energy102.077877
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 LSDA/6-31G**
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 3552 3486 17.87      
2 A 3463 3398 1.72      
3 A 2355 2311 0.32      
4 A 1578 1549 5.20      
5 A 1121 1100 2.22      
6 A 854 838 0.05      
7 A 494 485 21.21      
8 A 416 408 18.43      
9 A 361 354 184.33      
10 A 160 157 26.64      
11 B 3551 3485 17.29      
12 B 3470 3405 2.87      
13 B 1590 1561 42.87      
14 B 1450 1422 89.56      
15 B 1120 1099 2.30      
16 B 434 426 207.53      
17 B 393 385 138.47      
18 B 159 156 25.81      

Unscaled Zero Point Vibrational Energy (zpe) 13260.2 cm-1
Scaled (by 0.9813) Zero Point Vibrational Energy (zpe) 13012.2 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 LSDA/6-31G**
ABC
5.32641 0.11995 0.11994

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.008 0.611 0.016
C2 -0.008 -0.611 0.016
N3 -0.008 1.955 -0.060
N4 0.008 -1.955 -0.060
H5 -0.357 2.443 0.766
H6 0.834 2.389 -0.440
H7 0.357 -2.443 0.766
H8 -0.834 -2.389 -0.440

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8
C11.22171.34652.56702.01312.01283.16383.1487
C21.22172.56701.34653.16383.14872.01312.0128
N31.34652.56703.91011.02051.02074.48964.4380
N42.56701.34653.91014.48964.43801.02051.0207
H52.01313.16381.02054.48961.69574.93785.0026
H62.01283.14871.02074.43801.69575.00265.0606
H73.16382.01314.48961.02054.93785.00261.6957
H83.14872.01284.43801.02075.00265.06061.6957

picture of Diaminoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 176.479 C1 N3 H5 115.852
C1 N3 H6 115.801 C2 C1 N3 176.479
C2 N4 H7 115.852 C2 N4 H8 115.801
H5 N3 H6 112.354 H7 N4 H8 112.354
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.193      
2 C 0.193      
3 N -0.770      
4 N -0.770      
5 H 0.287      
6 H 0.289      
7 H 0.287      
8 H 0.289      


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 1.190 1.190
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.172 3.221 0.000
y 3.221 -11.255 0.000
z 0.000 0.000 -23.225
Traceless
 xyz
x -5.933 3.221 0.000
y 3.221 11.944 0.000
z 0.000 0.000 -6.011
Polar
3z2-r2-12.022
x2-y2-11.917
xy3.221
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.713 0.217 0.000
y 0.217 9.765 0.000
z 0.000 0.000 2.708


<r2> (average value of r2) Å2
<r2> 96.425
(<r2>)1/2 9.820