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

using model chemistry: wB97X-D/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-261.793769
Energy at 298.15K-261.791820
HF Energy-261.793769
Nuclear repulsion energy144.424832
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/aug-cc-pVTZ
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 2466 2359 0.00      
2 Σg 2271 2172 0.00      
3 Σg 616 589 0.00      
4 Σu 2403 2299 13.09      
5 Σu 1181 1130 0.01      
6 Πg 572 547 0.00      
6 Πg 572 547 0.00      
7 Πg 282 270 0.00      
7 Πg 282 270 0.00      
8 Πu 513 491 8.21      
8 Πu 513 491 8.21      
9 Πu 112 107 10.56      
9 Πu 112 107 10.56      

Unscaled Zero Point Vibrational Energy (zpe) 5946.8 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 5688.7 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/aug-cc-pVTZ
B
0.04499

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.593
C2 0.000 0.000 -0.593
C3 0.000 0.000 1.959
C4 0.000 0.000 -1.959
N5 0.000 0.000 3.111
N6 0.000 0.000 -3.111

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6
C11.18551.36602.55152.51853.7040
C21.18552.55151.36603.70402.5185
C31.36602.55153.91741.15255.0700
C42.55151.36603.91745.07001.1525
N52.51853.70401.15255.07006.2225
N63.70402.51855.07001.15256.2225

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/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.553      
2 C 0.553      
3 C -0.037      
4 C -0.037      
5 N -0.517      
6 N -0.517      


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 -31.708 0.000 0.000
y 0.000 -31.708 0.000
z 0.000 0.000 -50.641
Traceless
 xyz
x 9.466 0.000 0.000
y 0.000 9.466 0.000
z 0.000 0.000 -18.933
Polar
3z2-r2-37.866
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 4.874 0.000 0.000
y 0.000 4.874 0.000
z 0.000 0.000 17.929


<r2> (average value of r2) Å2
<r2> 211.074
(<r2>)1/2 14.528