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: B3LYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-260.583501
Energy at 298.15K 
HF Energy-260.583501
Nuclear repulsion energy158.510354
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 B3LYP/3-21G
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 3191 3.83 86.94 0.10 0.19
2 A1 1373 1325 14.57 16.61 0.50 0.66
3 A1 1299 1253 3.35 12.78 0.19 0.32
4 A1 1047 1010 0.00 4.77 0.24 0.39
5 A1 955 921 2.84 4.77 0.50 0.67
6 A1 836 807 10.38 10.24 0.12 0.22
7 A2 945 911 0.00 2.56 0.75 0.86
8 A2 653 630 0.00 0.40 0.75 0.86
9 B1 880 849 49.38 1.25 0.75 0.86
10 B1 584 563 0.76 0.68 0.75 0.86
11 B2 3292 3176 0.01 55.47 0.75 0.86
12 B2 1515 1462 5.72 0.09 0.75 0.86
13 B2 1209 1166 10.73 0.89 0.75 0.86
14 B2 966 932 13.92 5.23 0.75 0.86
15 B2 744 718 0.60 0.57 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9801.7 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 9457.7 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 B3LYP/3-21G
ABC
0.33296 0.30166 0.15827

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.184
N2 0.000 1.192 0.336
N3 0.000 -1.192 0.336
C4 0.000 0.716 -0.891
C5 0.000 -0.716 -0.891
H6 0.000 1.371 -1.745
H7 0.000 -1.371 -1.745

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.46291.46292.19562.19563.23443.2344
N21.46292.38391.31632.26872.08903.3014
N31.46292.38392.26871.31633.30142.0890
C42.19561.31632.26871.43221.07612.2549
C52.19562.26871.31631.43222.25491.0761
H63.23442.08903.30141.07612.25492.7415
H73.23443.30142.08902.25491.07612.7415

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 104.245 O1 N3 C5 104.245
N2 O1 N3 109.127 N2 C4 C5 111.192
N2 C4 H6 121.337 N3 C5 C4 111.192
N3 C5 H7 121.337 C4 C5 H7 127.471
C5 C4 H6 127.471
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.186      
2 N -0.182      
3 N -0.182      
4 C 0.019      
5 C 0.019      
6 H 0.256      
7 H 0.256      


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 -3.763 3.763
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.491 0.000 0.000
y 0.000 -29.884 0.000
z 0.000 0.000 -25.553
Traceless
 xyz
x -0.772 0.000 0.000
y 0.000 -2.862 0.000
z 0.000 0.000 3.634
Polar
3z2-r27.269
x2-y21.393
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.682 0.000 0.000
y 0.000 5.292 0.000
z 0.000 0.000 5.405


<r2> (average value of r2) Å2
<r2> 75.700
(<r2>)1/2 8.701