return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C2H2N2O (Furazan)

using model chemistry: HSEh1PBE/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HSEh1PBE/6-31G(2df,p)
 hartrees
Energy at 0K-261.800255
Energy at 298.15K 
HF Energy-261.800255
Nuclear repulsion energy164.804190
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 HSEh1PBE/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3307 3167 0.43 86.66 0.10 0.18
2 A1 1482 1420 10.58 16.69 0.30 0.46
3 A1 1369 1311 4.74 13.92 0.12 0.22
4 A1 1085 1039 22.93 6.45 0.33 0.49
5 A1 1074 1029 0.28 6.78 0.19 0.32
6 A1 944 904 17.48 4.07 0.10 0.18
7 A2 922 883 0.00 1.31 0.75 0.86
8 A2 672 643 0.00 0.33 0.75 0.86
9 B1 875 838 31.18 0.69 0.75 0.86
10 B1 675 646 1.59 0.52 0.75 0.86
11 B2 3292 3152 0.19 54.59 0.75 0.86
12 B2 1609 1541 0.13 0.09 0.75 0.86
13 B2 1208 1157 4.19 0.85 0.75 0.86
14 B2 982 941 12.83 4.40 0.75 0.86
15 B2 953 913 15.86 0.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10224.1 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 9791.6 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 HSEh1PBE/6-31G(2df,p)
ABC
0.35470 0.33075 0.17115

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.113
N2 0.000 1.117 0.359
N3 0.000 -1.117 0.359
C4 0.000 0.707 -0.877
C5 0.000 -0.707 -0.877
H6 0.000 1.408 -1.697
H7 0.000 -1.408 -1.697

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.34801.34802.11212.11213.14333.1433
N21.34802.23461.30212.20382.07653.2566
N31.34802.23462.20381.30213.25662.0765
C42.11211.30212.20381.41471.07882.2690
C52.11212.20381.30211.41472.26901.0788
H63.14332.07653.25661.07882.26902.8164
H73.14333.25662.07652.26901.07882.8164

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 105.670 O1 N3 C5 105.670
N2 O1 N3 111.959 N2 C4 C5 108.351
N2 C4 H6 121.136 N3 C5 C4 108.351
N3 C5 H7 121.136 C4 C5 H7 130.514
C5 C4 H6 130.514
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.162      
2 N -0.048      
3 N -0.048      
4 C -0.051      
5 C -0.051      
6 H 0.179      
7 H 0.179      


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 -3.164 3.164
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.896 0.000 0.000
y 0.000 -29.176 0.000
z 0.000 0.000 -24.684
Traceless
 xyz
x -0.966 0.000 0.000
y 0.000 -2.886 0.000
z 0.000 0.000 3.852
Polar
3z2-r27.704
x2-y21.280
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.771 0.000 0.000
y 0.000 5.735 0.000
z 0.000 0.000 5.766


<r2> (average value of r2) Å2
<r2> 71.175
(<r2>)1/2 8.437