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-244.588494
Energy at 298.15K 
HF Energy-244.588494
Nuclear repulsion energy164.419278
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' 3485 3131 0.80 107.76 0.10 0.19
2 A' 3463 3112 0.68 39.36 0.73 0.85
3 A' 3443 3094 5.00 87.25 0.42 0.59
4 A' 1802 1619 17.98 1.63 0.75 0.86
5 A' 1636 1470 50.23 37.55 0.26 0.41
6 A' 1545 1388 18.84 2.50 0.75 0.86
7 A' 1387 1246 9.92 10.74 0.38 0.55
8 A' 1282 1152 21.08 3.75 0.32 0.49
9 A' 1226 1101 12.77 12.13 0.36 0.53
10 A' 1119 1005 2.62 1.88 0.24 0.39
11 A' 1044 938 61.99 5.28 0.15 0.27
12 A' 1010 908 7.29 4.09 0.75 0.86
13 A' 999 898 1.17 1.94 0.56 0.72
14 A" 1046 940 2.47 2.93 0.75 0.86
15 A" 1030 926 0.07 0.85 0.75 0.86
16 A" 876 787 56.49 1.08 0.75 0.86
17 A" 703 632 4.06 0.26 0.75 0.86
18 A" 648 582 20.45 2.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13872.0 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 12464.0 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
0.33902 0.32791 0.16669

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 0.370 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 -1.889 0.000
H8 -0.178 2.164 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42821.34032.24542.18781.06822.25892.2131
C21.42822.15381.28152.11092.25791.07113.2184
C31.34032.15382.18861.32042.17673.20431.0692
N42.24541.28152.18861.36053.27362.03423.1736
O52.18782.11091.32041.36053.22583.12842.0339
H61.06822.25792.17673.27363.22582.77012.7431
H72.25891.07113.20432.03423.12842.77014.2586
H82.21313.21841.06923.17362.03392.74314.2586

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 111.810 C1 C2 H7 128.766
C1 C3 O5 110.622 C1 C3 H8 133.097
C2 C1 C3 102.101 C2 C1 H6 128.930
C2 N4 O5 106.029 C3 C1 H6 128.970
C3 O5 N4 109.438 N4 C2 H7 119.423
O5 C3 H8 116.281
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 -0.381      
2 C 0.047      
3 C 0.204      
4 N -0.134      
5 O -0.433      
6 H 0.230      
7 H 0.230      
8 H 0.237      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.878 1.567 0.000 3.277
CHELPG 2.799 1.531 0.000 3.190
AIM -2.971 -0.117 0.000 2.973
ESP 2.823 1.547 0.000 3.219


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.758 -2.725 0.000
y -2.725 -24.491 0.000
z 0.000 0.000 -29.966
Traceless
 xyz
x -1.529 -2.725 0.000
y -2.725 4.872 0.000
z 0.000 0.000 -3.342
Polar
3z2-r2-6.684
x2-y2-4.267
xy-2.725
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.770 -0.357 0.000
y -0.357 6.041 0.000
z 0.000 0.000 2.375


<r2> (average value of r2) Å2
<r2> 75.208
(<r2>)1/2 8.672