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 C3H3NO (Isoxazole)

using model chemistry: HF/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/6-31G**
 hartrees
Energy at 0K-244.594184
Energy at 298.15K 
HF Energy-244.594184
Nuclear repulsion energy164.424623
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/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3466 3128 0.56 103.77 0.10 0.18
2 A' 3442 3106 0.45 42.62 0.73 0.84
3 A' 3421 3088 4.80 87.18 0.40 0.57
4 A' 1801 1626 17.55 1.61 0.75 0.86
5 A' 1636 1477 50.49 38.02 0.26 0.41
6 A' 1543 1392 18.53 2.47 0.74 0.85
7 A' 1383 1248 10.31 10.93 0.38 0.55
8 A' 1278 1154 21.21 3.60 0.32 0.48
9 A' 1224 1105 12.53 12.54 0.35 0.52
10 A' 1116 1008 2.45 1.94 0.26 0.41
11 A' 1044 942 62.78 5.14 0.15 0.27
12 A' 1010 911 7.35 3.98 0.75 0.86
13 A' 999 902 1.16 2.01 0.56 0.71
14 A" 1047 945 2.61 2.76 0.75 0.86
15 A" 1030 930 0.13 0.95 0.75 0.86
16 A" 876 790 55.94 1.12 0.75 0.86
17 A" 703 635 4.01 0.27 0.75 0.86
18 A" 648 585 20.14 1.99 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13832.9 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 12485.5 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/6-31G**
ABC
0.33908 0.32792 0.16670

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.117 0.369 0.000
C2 0.596 -0.960 0.000
C3 0.000 1.110 0.000
N4 -0.686 -0.968 0.000
O5 -1.070 0.337 0.000
H6 2.136 0.691 0.000
H7 1.128 -1.890 0.000
H8 -0.175 2.165 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42811.34032.24502.18761.06812.25922.2125
C21.42812.15401.28152.11082.25801.07163.2189
C31.34032.15402.18841.32062.17623.20491.0697
N42.24501.28152.18841.36003.27332.03483.1747
O52.18762.11081.32061.36003.22543.12882.0360
H61.06812.25802.17623.27333.22542.77082.7409
H72.25921.07163.20492.03483.12882.77084.2594
H82.21253.21891.06973.17472.03602.74094.2594

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 111.784 C1 C2 H7 128.771
C1 C3 O5 110.600 C1 C3 H8 132.976
C2 C1 C3 102.121 C2 C1 H6 128.962
C2 N4 O5 106.052 C3 C1 H6 128.917
C3 O5 N4 109.443 N4 C2 H7 119.444
O5 C3 H8 116.424
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.331      
2 C 0.107      
3 C 0.262      
4 N -0.141      
5 O -0.439      
6 H 0.176      
7 H 0.179      
8 H 0.186      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.878 1.565 0.000 3.276
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.765 -2.726 0.000
y -2.726 -24.460 0.000
z 0.000 0.000 -29.943
Traceless
 xyz
x -1.563 -2.726 0.000
y -2.726 4.893 0.000
z 0.000 0.000 -3.330
Polar
3z2-r2-6.660
x2-y2-4.304
xy-2.726
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.805 -0.363 0.000
y -0.363 6.082 0.000
z 0.000 0.000 2.412


<r2> (average value of r2) Å2
<r2> 75.197
(<r2>)1/2 8.672