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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: HF/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 HF/3-21G*
 hartrees
Energy at 0K-243.210695
Energy at 298.15K 
HF Energy-243.210695
Nuclear repulsion energy161.339461
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/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' 3502 3161 0.88 94.82 0.09 0.17
2 A' 3474 3136 0.50 45.26 0.72 0.84
3 A' 3452 3116 1.82 75.08 0.40 0.57
4 A' 1732 1564 16.22 1.66 0.26 0.41
5 A' 1563 1411 30.07 36.15 0.31 0.48
6 A' 1501 1355 12.95 1.93 0.35 0.52
7 A' 1358 1226 8.47 8.25 0.48 0.65
8 A' 1252 1130 14.65 10.46 0.48 0.65
9 A' 1126 1016 20.61 5.61 0.51 0.67
10 A' 1099 992 7.86 2.94 0.13 0.23
11 A' 1030 929 9.69 5.72 0.58 0.73
12 A' 980 885 1.30 1.60 0.44 0.61
13 A' 927 837 35.71 9.17 0.20 0.33
14 A" 1116 1007 0.08 2.63 0.75 0.86
15 A" 1066 962 2.91 2.68 0.75 0.86
16 A" 920 831 84.33 1.13 0.75 0.86
17 A" 698 630 13.21 0.03 0.75 0.86
18 A" 624 563 14.50 2.49 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13709.8 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 12374.5 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/3-21G*
ABC
0.33044 0.31210 0.16050

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.110 0.390 0.000
C2 0.620 -0.961 0.000
C3 0.000 1.138 0.000
N4 -0.670 -1.028 0.000
O5 -1.106 0.345 0.000
H6 2.123 0.707 0.000
H7 1.193 -1.858 0.000
H8 -0.164 2.188 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.43621.33842.27532.21561.06222.24932.2041
C21.43622.18831.29172.16392.24521.06493.2452
C31.33842.18832.26761.36062.16643.22501.0631
N42.27531.29172.26761.44083.28842.03953.2563
O52.21562.16391.36061.44083.24903.18402.0699
H61.06222.24522.16643.28843.24902.72882.7250
H72.24931.06493.22502.03953.18402.72884.2682
H82.20413.24521.06313.25632.06992.72504.2682

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 112.935 C1 C2 H7 127.516
C1 C3 O5 110.348 C1 C3 H8 132.883
C2 C1 C3 104.073 C2 C1 H6 127.330
C2 N4 O5 104.595 C3 C1 H6 128.597
C3 O5 N4 108.049 N4 C2 H7 119.549
O5 C3 H8 116.769
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.489      
2 C 0.110      
3 C 0.259      
4 N -0.223      
5 O -0.508      
6 H 0.264      
7 H 0.292      
8 H 0.295      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  3.405 1.552 0.000 3.742
CHELPG 3.291 1.519 0.000 3.624
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.840 -2.759 0.000
y -2.759 -24.447 0.000
z 0.000 0.000 -30.611
Traceless
 xyz
x -2.311 -2.759 0.000
y -2.759 5.779 0.000
z 0.000 0.000 -3.467
Polar
3z2-r2-6.935
x2-y2-5.393
xy-2.759
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.401 -0.444 0.000
y -0.444 5.793 0.000
z 0.000 0.000 1.650


<r2> (average value of r2) Å2
<r2> 77.562
(<r2>)1/2 8.807