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: mPW1PW91/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 mPW1PW91/STO-3G
 hartrees
Energy at 0K-242.852571
Energy at 298.15K 
HF Energy-242.852571
Nuclear repulsion energy158.318543
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 mPW1PW91/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' 3580 3147 25.75 55.30 0.13 0.23
2 A' 3537 3109 28.91 18.92 0.47 0.64
3 A' 3530 3102 15.71 66.67 0.52 0.69
4 A' 1698 1492 8.11 1.85 0.17 0.28
5 A' 1516 1332 32.08 15.46 0.54 0.70
6 A' 1473 1295 1.30 8.39 0.30 0.46
7 A' 1304 1146 3.10 5.94 0.25 0.41
8 A' 1211 1065 5.73 12.28 0.36 0.53
9 A' 1172 1030 1.70 3.26 0.22 0.36
10 A' 1115 980 0.36 7.25 0.63 0.77
11 A' 1048 921 12.18 4.78 0.14 0.24
12 A' 946 832 1.63 4.89 0.75 0.86
13 A' 930 818 1.55 0.14 0.75 0.86
14 A" 940 827 0.20 1.03 0.75 0.86
15 A" 901 792 1.70 1.77 0.75 0.86
16 A" 807 709 31.41 1.09 0.75 0.86
17 A" 643 565 4.80 0.04 0.75 0.86
18 A" 596 524 0.51 0.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13473.7 cm-1
Scaled (by 0.8789) Zero Point Vibrational Energy (zpe) 11842.0 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 mPW1PW91/STO-3G
ABC
0.31249 0.30690 0.15484

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.137 0.385 0.000
C2 0.657 -0.962 0.000
C3 0.000 1.149 0.000
N4 -0.704 -1.030 0.000
O5 -1.133 0.339 0.000
H6 2.172 0.724 0.000
H7 1.240 -1.888 0.000
H8 -0.175 2.230 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42991.36912.32232.27051.08952.27552.2635
C21.42992.20991.36292.21242.26671.09463.2984
C31.36912.20992.28961.39312.21313.27971.0957
N42.32231.36292.28961.43423.36922.12533.3030
O52.27052.21241.39311.43423.32793.25422.1207
H61.08952.26672.21313.36923.32792.77322.7886
H72.27551.09463.27972.12533.25422.77324.3543
H82.26353.29841.09573.30302.12072.78864.3543

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.489 C1 C2 H7 128.184
C1 C3 O5 110.570 C1 C3 H8 133.062
C2 C1 C3 104.268 C2 C1 H6 127.727
C2 N4 O5 104.524 C3 C1 H6 128.005
C3 O5 N4 108.149 N4 C2 H7 119.327
O5 C3 H8 116.369
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.125      
2 C -0.033      
3 C 0.007      
4 N -0.114      
5 O -0.062      
6 H 0.104      
7 H 0.109      
8 H 0.114      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.909 1.425 0.000 2.382
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.595 -2.164 0.000
y -2.164 -24.210 0.000
z 0.000 0.000 -26.878
Traceless
 xyz
x -1.051 -2.164 0.000
y -2.164 2.526 0.000
z 0.000 0.000 -1.475
Polar
3z2-r2-2.951
x2-y2-2.385
xy-2.164
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.754 -0.265 0.000
y -0.265 4.388 0.000
z 0.000 0.000 0.809


<r2> (average value of r2) Å2
<r2> 78.309
(<r2>)1/2 8.849