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All results from a given calculation for C3H3NO (Isoxazole)

using model chemistry: HF/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-244.613285
Energy at 298.15K 
HF Energy-244.613285
Nuclear repulsion energy164.745195
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/6-31G(2df,p)
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' 3446 3121 0.54 96.43 0.11 0.19
2 A' 3418 3095 0.76 44.06 0.65 0.79
3 A' 3399 3078 4.65 85.16 0.40 0.57
4 A' 1788 1619 17.43 1.43 0.75 0.86
5 A' 1624 1471 46.43 36.56 0.21 0.34
6 A' 1531 1386 21.20 2.42 0.74 0.85
7 A' 1377 1247 9.97 10.88 0.32 0.49
8 A' 1274 1153 21.43 4.00 0.29 0.45
9 A' 1216 1101 12.70 11.83 0.30 0.46
10 A' 1107 1003 2.65 2.04 0.19 0.32
11 A' 1045 947 55.20 4.55 0.12 0.22
12 A' 1007 912 9.10 3.20 0.75 0.85
13 A' 997 903 1.57 1.77 0.61 0.76
14 A" 1047 948 2.78 2.02 0.75 0.86
15 A" 1032 934 0.05 0.44 0.75 0.86
16 A" 874 791 48.35 0.64 0.75 0.86
17 A" 705 639 3.59 0.28 0.75 0.86
18 A" 649 587 18.02 1.54 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13768.0 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 12466.9 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/6-31G(2df,p)
ABC
0.33994 0.32958 0.16734

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.116 0.369 0.000
C2 0.594 -0.960 0.000
C3 0.000 1.106 0.000
N4 -0.685 -0.964 0.000
O5 -1.069 0.337 0.000
H6 2.133 0.692 0.000
H7 1.124 -1.891 0.000
H8 -0.175 2.161 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 H6 H7 H8
C11.42771.33762.24032.18491.06722.25962.2092
C21.42772.14981.27892.10852.25781.07133.2147
C31.33762.14982.18001.31672.17323.20081.0696
N42.24031.27892.18001.35573.26832.03313.1660
O52.18492.10851.31671.35573.22153.12592.0314
H61.06722.25782.17323.26833.22152.77242.7368
H72.25961.07133.20082.03313.12592.77244.2554
H82.20923.21471.06963.16602.03142.73684.2554

picture of Isoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 111.607 C1 C2 H7 128.870
C1 C3 O5 110.803 C1 C3 H8 132.884
C2 C1 C3 101.997 C2 C1 H6 129.056
C2 N4 O5 106.283 C3 C1 H6 128.947
C3 O5 N4 109.310 N4 C2 H7 119.524
O5 C3 H8 116.314
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.325      
2 C -0.005      
3 C 0.153      
4 N -0.030      
5 O -0.342      
6 H 0.177      
7 H 0.179      
8 H 0.192      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.732 1.526 0.000 3.130
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.337 -2.727 0.000
y -2.727 -24.424 0.000
z 0.000 0.000 -29.710
Traceless
 xyz
x -1.270 -2.727 0.000
y -2.727 4.600 0.000
z 0.000 0.000 -3.329
Polar
3z2-r2-6.659
x2-y2-3.913
xy-2.727
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.922 -0.326 0.000
y -0.326 6.271 0.000
z 0.000 0.000 2.887


<r2> (average value of r2) Å2
<r2> 74.843
(<r2>)1/2 8.651