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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: PBE1PBE/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBE1PBE/3-21G*
 hartrees
Energy at 0K-244.390890
Energy at 298.15K 
HF Energy-244.390890
Nuclear repulsion energy159.324321
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 PBE1PBE/3-21G*
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' 3350 3215 1.48 94.43 0.10 0.18
2 A' 3320 3186 1.01 54.17 0.63 0.77
3 A' 3299 3166 0.90 73.15 0.39 0.56
4 A' 1580 1516 10.07 4.04 0.12 0.22
5 A' 1428 1370 26.77 22.55 0.45 0.62
6 A' 1385 1329 4.18 5.84 0.16 0.28
7 A' 1238 1188 7.00 8.50 0.30 0.46
8 A' 1159 1112 17.70 8.26 0.58 0.74
9 A' 1094 1050 3.17 7.47 0.14 0.24
10 A' 1047 1005 13.88 2.47 0.72 0.84
11 A' 950 912 3.10 5.20 0.65 0.79
12 A' 914 877 0.60 1.78 0.44 0.61
13 A' 839 805 16.88 7.05 0.15 0.26
14 A" 963 925 1.60 1.63 0.75 0.86
15 A" 919 882 4.82 1.47 0.75 0.86
16 A" 816 783 85.12 1.16 0.75 0.86
17 A" 646 620 10.75 0.12 0.75 0.86
18 A" 595 571 9.00 1.82 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12769.8 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 12256.4 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 PBE1PBE/3-21G*
ABC
0.31937 0.30752 0.15667

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.124 0.383 0.000
C2 0.638 -0.959 0.000
C3 0.000 1.146 0.000
N4 -0.683 -1.044 0.000
O5 -1.124 0.355 0.000
H6 2.149 0.709 0.000
H7 1.217 -1.868 0.000
H8 -0.166 2.210 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42801.35872.30332.24871.07502.25372.2361
C21.42802.19971.32342.19762.25081.07833.2692
C31.35872.19972.29451.37492.19293.25101.0765
N42.30331.32342.29451.46683.33072.07133.2951
O52.24872.19761.37491.46683.29213.22852.0883
H61.07502.25082.19293.33073.29212.74052.7585
H72.25371.07833.25102.07133.22852.74054.3063
H82.23613.26921.07653.29512.08832.75854.3063

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 113.625 C1 C2 H7 127.553
C1 C3 O5 110.692 C1 C3 H8 133.005
C2 C1 C3 104.224 C2 C1 H6 127.560
C2 N4 O5 103.805 C3 C1 H6 128.216
C3 O5 N4 107.654 N4 C2 H7 118.823
O5 C3 H8 116.303
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.391      
2 C 0.044      
3 C 0.141      
4 N -0.220      
5 O -0.365      
6 H 0.240      
7 H 0.274      
8 H 0.277      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.907 1.506 0.000 3.274
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.723 -2.567 0.000
y -2.567 -24.386 0.000
z 0.000 0.000 -30.383
Traceless
 xyz
x -1.338 -2.567 0.000
y -2.567 5.167 0.000
z 0.000 0.000 -3.829
Polar
3z2-r2-7.658
x2-y2-4.337
xy-2.567
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.538 -0.300 0.000
y -0.300 6.250 0.000
z 0.000 0.000 1.768


<r2> (average value of r2) Å2
<r2> 78.709
(<r2>)1/2 8.872