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All results from a given calculation for C4N2 (2-Butynedinitrile)

using model chemistry: wB97X-D/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at wB97X-D/cc-pVDZ
 hartrees
Energy at 0K-261.709463
Energy at 298.15K-261.707695
HF Energy-261.709463
Nuclear repulsion energy143.488782
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 wB97X-D/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 2473 2356 0.00      
2 Σg 2273 2165 0.00      
3 Σg 618 589 0.00      
4 Σu 2406 2292 18.31      
5 Σu 1187 1131 0.01      
6 Πg 621 592 0.00      
6 Πg 621 592 0.00      
7 Πg 301 287 0.00      
7 Πg 301 287 0.00      
8 Πu 549 523 3.62      
8 Πu 549 523 3.62      
9 Πu 121 115 10.45      
9 Πu 121 115 10.45      

Unscaled Zero Point Vibrational Energy (zpe) 6069.6 cm-1
Scaled (by 0.9526) Zero Point Vibrational Energy (zpe) 5781.9 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 wB97X-D/cc-pVDZ
B
0.04446

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/cc-pVDZ

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.596
C2 0.000 0.000 -0.596
C3 0.000 0.000 1.966
C4 0.000 0.000 -1.966
N5 0.000 0.000 3.127
N6 0.000 0.000 -3.127

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6
C11.19171.36992.56152.53133.7229
C21.19172.56151.36993.72292.5313
C31.36992.56153.93141.16145.0928
C42.56151.36993.93145.09281.1614
N52.53133.72291.16145.09286.2542
N63.72292.53135.09281.16146.2542

picture of 2-Butynedinitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 180.000 C1 C3 N5 180.000
C2 C1 C3 180.000 C2 C4 N6 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 1.629      
2 C 1.629      
3 C -1.122      
4 C -1.122      
5 N -0.506      
6 N -0.506      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.923 0.000 0.000
y 0.000 -31.923 0.000
z 0.000 0.000 -51.125
Traceless
 xyz
x 9.601 0.000 0.000
y 0.000 9.601 0.000
z 0.000 0.000 -19.202
Polar
3z2-r2-38.404
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.500 0.000 0.000
y 0.000 3.500 0.000
z 0.000 0.000 18.324


<r2> (average value of r2) Å2
<r2> 213.504
(<r2>)1/2 14.612