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: B3LYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/STO-3G
 hartrees
Energy at 0K-242.876224
Energy at 298.15K 
HF Energy-242.876224
Nuclear repulsion energy157.201036
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/STO-3G
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' 3530 3150 21.15 58.59 0.13 0.23
2 A' 3487 3112 25.25 17.65 0.47 0.64
3 A' 3481 3106 11.68 73.83 0.52 0.68
4 A' 1659 1481 7.25 2.14 0.17 0.29
5 A' 1483 1323 29.58 12.45 0.58 0.73
6 A' 1438 1283 1.62 11.69 0.36 0.53
7 A' 1268 1132 2.23 7.07 0.22 0.36
8 A' 1186 1058 6.00 12.09 0.40 0.57
9 A' 1144 1021 1.33 3.03 0.23 0.38
10 A' 1098 979 0.56 6.23 0.62 0.77
11 A' 1015 906 10.12 5.74 0.14 0.24
12 A' 931 831 1.38 5.02 0.74 0.85
13 A' 911 813 1.96 0.12 0.69 0.82
14 A" 919 820 0.19 1.07 0.75 0.86
15 A" 880 786 1.87 1.84 0.75 0.86
16 A" 790 705 30.37 1.12 0.75 0.86
17 A" 628 561 4.68 0.05 0.75 0.86
18 A" 580 518 0.34 0.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13213.6 cm-1
Scaled (by 0.8924) Zero Point Vibrational Energy (zpe) 11791.8 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/STO-3G
ABC
0.30803 0.30261 0.15265

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.142 0.389 0.000
C2 0.664 -0.966 0.000
C3 0.000 1.157 0.000
N4 -0.707 -1.043 0.000
O5 -1.143 0.343 0.000
H6 2.179 0.730 0.000
H7 1.253 -1.892 0.000
H8 -0.175 2.242 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.43701.37572.33802.28491.09242.28412.2724
C21.43702.22441.37242.23082.27461.09763.3154
C31.37572.22442.31051.40342.22093.29651.0986
N42.33801.37242.31051.45253.38702.13543.3272
O52.28492.23081.40341.45253.34493.27612.1316
H61.09242.27462.22093.38703.34492.78112.7978
H72.28411.09763.29652.13543.27612.78114.3733
H82.27243.31541.09863.32722.13162.79784.3733

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.631 C1 C2 H7 128.126
C1 C3 O5 110.602 C1 C3 H8 133.080
C2 C1 C3 104.503 C2 C1 H6 127.594
C2 N4 O5 104.274 C3 C1 H6 127.903
C3 O5 N4 107.990 N4 C2 H7 119.243
O5 C3 H8 116.318
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.118      
2 C -0.027      
3 C 0.011      
4 N -0.114      
5 O -0.063      
6 H 0.099      
7 H 0.104      
8 H 0.109      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.897 1.402 0.000 2.359
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.633 -2.152 0.000
y -2.152 -24.239 0.000
z 0.000 0.000 -26.902
Traceless
 xyz
x -1.062 -2.152 0.000
y -2.152 2.529 0.000
z 0.000 0.000 -1.467
Polar
3z2-r2-2.933
x2-y2-2.394
xy-2.152
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.842 -0.269 0.000
y -0.269 4.514 0.000
z 0.000 0.000 0.825


<r2> (average value of r2) Å2
<r2> 79.178
(<r2>)1/2 8.898