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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: HF/CEP-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/CEP-31G
 hartrees
Energy at 0K-43.384773
Energy at 298.15K 
HF Energy-43.384773
Nuclear repulsion energy83.206831
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/CEP-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' 3525 3177 0.79 117.78 0.19 0.32
2 A' 3498 3153 0.03 33.58 0.63 0.78
3 A' 3483 3140 3.05 79.56 0.47 0.64
4 A' 1731 1560 16.94 3.21 0.52 0.68
5 A' 1585 1429 50.50 50.97 0.25 0.40
6 A' 1497 1350 5.97 4.42 0.24 0.38
7 A' 1354 1220 12.31 9.19 0.38 0.56
8 A' 1244 1121 22.29 11.28 0.25 0.40
9 A' 1159 1044 17.28 10.51 0.34 0.50
10 A' 1124 1013 5.55 2.65 0.08 0.15
11 A' 1007 908 17.76 8.52 0.59 0.74
12 A' 979 883 23.62 2.25 0.49 0.66
13 A' 960 865 32.43 11.19 0.37 0.54
14 A" 1058 953 0.83 2.70 0.75 0.86
15 A" 1029 928 1.07 5.33 0.75 0.86
16 A" 900 811 96.49 1.38 0.75 0.86
17 A" 683 616 8.17 0.01 0.75 0.86
18 A" 623 561 17.20 3.20 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13718.3 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 12365.7 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/CEP-31G
ABC
0.32523 0.31048 0.15884

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.132 0.381 0.000
C2 0.618 -0.979 0.000
C3 0.000 1.149 0.000
N4 -0.694 -1.007 0.000
O5 -1.099 0.343 0.000
H6 2.153 0.697 0.000
H7 1.165 -1.901 0.000
H8 -0.175 2.204 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.45321.36842.29342.23101.06862.28142.2440
C21.45322.21601.31242.16702.27191.07153.2806
C31.36842.21602.26531.36252.19993.26451.0696
N42.29341.31242.26531.41003.31762.06193.2532
O52.23102.16701.36251.41003.27063.18702.0774
H61.06862.27192.19993.31763.27062.77892.7738
H72.28141.07153.26452.06193.18702.77894.3181
H82.24403.28061.06963.25322.07742.77384.3181

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 111.949 C1 C2 H7 128.648
C1 C3 O5 109.563 C1 C3 H8 133.611
C2 C1 C3 103.470 C2 C1 H6 127.908
C2 N4 O5 105.441 C3 C1 H6 128.621
C3 O5 N4 109.577 N4 C2 H7 119.403
O5 C3 H8 116.826
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.019      
2 C -0.472      
3 C -0.249      
4 N 0.130      
5 O -0.262      
6 H 0.306      
7 H 0.262      
8 H 0.267      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  3.793 1.676 0.000 4.147
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.641 -3.077 0.000
y -3.077 -24.983 0.000
z 0.000 0.000 -30.832
Traceless
 xyz
x -2.733 -3.077 0.000
y -3.077 5.753 0.000
z 0.000 0.000 -3.020
Polar
3z2-r2-6.039
x2-y2-5.657
xy-3.077
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.991 -0.418 0.000
y -0.418 6.272 0.000
z 0.000 0.000 2.632


<r2> (average value of r2) Å2
<r2> 64.756
(<r2>)1/2 8.047