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: HF/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-121G*
 hartrees
Energy at 0K-47.093435
Energy at 298.15K 
HF Energy-47.093435
Nuclear repulsion energy85.980317
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 HF/CEP-121G*
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 3456 3122 0.42 88.96 0.11 0.20
2 A1 1634 1476 9.18 33.60 0.14 0.24
3 A1 1466 1324 4.57 15.11 0.20 0.33
4 A1 1159 1047 54.54 7.99 0.35 0.52
5 A1 1105 998 0.33 2.33 0.11 0.20
6 A1 995 898 35.55 4.26 0.14 0.25
7 A2 1017 919 0.00 2.97 0.75 0.86
8 A2 704 636 0.00 0.01 0.75 0.86
9 B1 963 870 44.21 0.00 0.75 0.86
10 B1 678 613 1.29 0.93 0.75 0.86
11 B2 3443 3111 0.57 54.68 0.75 0.86
12 B2 1783 1611 0.16 1.29 0.75 0.86
13 B2 1330 1201 3.22 1.43 0.75 0.86
14 B2 1143 1033 0.41 0.60 0.75 0.86
15 B2 1042 942 28.64 5.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10958.8 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 9900.2 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 HF/CEP-121G*
ABC
0.36095 0.33112 0.17270

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.107
N2 0.000 1.109 0.352
N3 0.000 -1.109 0.352
C4 0.000 0.720 -0.868
C5 0.000 -0.720 -0.868
H6 0.000 1.415 -1.683
H7 0.000 -1.415 -1.683

Atom - Atom Distances (Å)
  O1 N2 N3 C4 C5 H6 H7
O11.34171.34172.10222.10223.12873.1287
N21.34172.21771.28022.19832.05813.2420
N31.34172.21772.19831.28023.24202.0581
C42.10221.28022.19831.44001.07132.2852
C52.10222.19831.28021.44002.28521.0713
H63.12872.05813.24201.07132.28522.8295
H73.12873.24202.05812.28521.07132.8295

picture of Furazan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C4 106.581 O1 N3 C5 106.581
N2 O1 N3 111.472 N2 C4 C5 107.683
N2 C4 H6 121.888 N3 C5 C4 107.683
N3 C5 H7 121.888 C4 C5 H7 130.429
C5 C4 H6 130.429
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.182      
2 N 0.065      
3 N 0.065      
4 C -0.223      
5 C -0.223      
6 H 0.249      
7 H 0.249      


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 -3.869 3.869
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.592 0.000 0.000
y 0.000 -30.031 0.000
z 0.000 0.000 -25.264
Traceless
 xyz
x -0.944 0.000 0.000
y 0.000 -3.103 0.000
z 0.000 0.000 4.047
Polar
3z2-r28.093
x2-y21.439
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.992 0.000 0.000
y 0.000 5.352 0.000
z 0.000 0.000 5.911


<r2> (average value of r2) Å2
<r2> 58.197
(<r2>)1/2 7.629