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All results from a given calculation for C2N2 (Cyanogen)

using model chemistry: mPW1PW91/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 mPW1PW91/cc-pVDZ
 hartrees
Energy at 0K-185.610578
Energy at 298.15K-185.609849
HF Energy-185.610578
Nuclear repulsion energy76.552320
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 mPW1PW91/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 2481 2377 0.00      
2 Σg 902 864 0.00      
3 Σu 2296 2200 0.14      
4 Πg 563 539 0.00      
4 Πg 563 539 0.00      
5 Πu 257 247 17.63      
5 Πu 257 247 17.63      

Unscaled Zero Point Vibrational Energy (zpe) 3658.9 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 3506.3 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 mPW1PW91/cc-pVDZ
B
0.15682

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/cc-pVDZ

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.691
C2 0.000 0.000 -0.691
N3 0.000 0.000 1.852
N4 0.000 0.000 -1.852

Atom - Atom Distances (Å)
  C1 C2 N3 N4
C11.38131.16132.5426
C21.38132.54261.1613
N31.16132.54263.7039
N42.54261.16133.7039

picture of Cyanogen state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 180.000 C2 C1 N3 180.000
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.076      
2 C 0.076      
3 N -0.076      
4 N -0.076      


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 -20.659 0.000 0.000
y 0.000 -20.659 0.000
z 0.000 0.000 -28.968
Traceless
 xyz
x 4.154 0.000 0.000
y 0.000 4.154 0.000
z 0.000 0.000 -8.309
Polar
3z2-r2-16.617
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 2.139 0.000 0.000
y 0.000 2.139 0.000
z 0.000 0.000 7.351


<r2> (average value of r2) Å2
<r2> 68.372
(<r2>)1/2 8.269