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: PBEPBE/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/TZVP
 hartrees
Energy at 0K-261.856349
Energy at 298.15K 
HF Energy-261.856349
Nuclear repulsion energy162.376634
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 PBEPBE/TZVP
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 3205 3169 0.93 111.10 0.10 0.18
2 A1 1406 1390 14.83 16.80 0.34 0.51
3 A1 1301 1287 3.19 20.04 0.05 0.10
4 A1 1038 1027 2.30 5.70 0.34 0.50
5 A1 998 987 11.36 6.16 0.22 0.35
6 A1 862 852 24.13 8.57 0.13 0.23
7 A2 837 828 0.00 1.39 0.75 0.86
8 A2 625 618 0.00 0.03 0.75 0.86
9 B1 822 813 44.71 0.24 0.75 0.86
10 B1 632 625 1.07 0.24 0.75 0.86
11 B2 3192 3156 0.43 61.01 0.75 0.86
12 B2 1520 1503 0.05 0.05 0.75 0.86
13 B2 1155 1142 6.71 0.73 0.75 0.86
14 B2 934 923 16.17 4.49 0.75 0.86
15 B2 737 729 7.30 0.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9632.0 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 9524.1 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 PBEPBE/TZVP
ABC
0.34633 0.31969 0.16624

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.134
N2 0.000 1.143 0.355
N3 0.000 -1.143 0.355
C4 0.000 0.710 -0.885
C5 0.000 -0.710 -0.885
H6 0.000 1.409 -1.716
H7 0.000 -1.409 -1.716

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.38371.38372.14062.14063.17973.1797
N21.38372.28681.31332.23032.08813.2872
N31.38372.28682.23031.31333.28722.0881
C42.14061.31332.23031.42091.08592.2769
C52.14062.23031.31331.42092.27691.0859
H63.17972.08813.28721.08592.27692.8186
H73.17973.28722.08812.27691.08592.8186

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 105.031 O1 N3 C5 105.031
N2 O1 N3 111.446 N2 C4 C5 109.246
N2 C4 H6 120.695 N3 C5 C4 109.246
N3 C5 H7 120.695 C4 C5 H7 130.059
C5 C4 H6 130.059
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.005      
2 N -0.012      
3 N -0.012      
4 C -0.135      
5 C -0.135      
6 H 0.149      
7 H 0.149      


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 -3.349 3.349
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.625 0.000 0.000
y 0.000 -30.278 0.000
z 0.000 0.000 -25.691
Traceless
 xyz
x -0.641 0.000 0.000
y 0.000 -3.120 0.000
z 0.000 0.000 3.761
Polar
3z2-r27.522
x2-y21.653
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.379 0.000 0.000
y 0.000 6.514 0.000
z 0.000 0.000 6.384


<r2> (average value of r2) Å2
<r2> 73.288
(<r2>)1/2 8.561