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All results from a given calculation for C4H5NO (Isoxazole, 5-methyl-)

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 C1 1A
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-50.033158
Energy at 298.15K-50.039857
Nuclear repulsion energy116.311300
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 3501 3156 0.65      
2 A 3479 3136 5.30      
3 A 3340 3011 33.75      
4 A 3318 2991 28.57      
5 A 3237 2918 29.28      
6 A 1776 1601 49.97      
7 A 1657 1494 53.84      
8 A 1625 1465 15.95      
9 A 1615 1456 12.45      
10 A 1570 1416 0.40      
11 A 1468 1323 7.10      
12 A 1350 1217 36.76      
13 A 1315 1186 28.01      
14 A 1197 1079 7.18      
15 A 1132 1021 6.22      
16 A 1126 1015 5.98      
17 A 1053 949 2.23      
18 A 1053 949 8.89      
19 A 1016 916 12.79      
20 A 971 875 32.23      
21 A 940 847 65.27      
22 A 698 629 2.67      
23 A 693 625 1.27      
24 A 660 595 0.62      
25 A 344 310 4.34      
26 A 270 243 5.30      
27 A 130 117 1.54      

Unscaled Zero Point Vibrational Energy (zpe) 20267.1 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 18268.8 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
0.30630 0.11547 0.08518

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.100 0.030 0.000
H2 -2.446 -0.508 0.881
H3 -2.534 1.025 -0.001
H4 -2.446 -0.510 -0.880
C5 -0.599 0.117 0.000
O6 0.094 -1.061 -0.000
N7 1.487 -0.805 0.000
C8 1.593 0.503 -0.000
H9 2.567 0.948 -0.000
C10 0.298 1.157 -0.000
H11 0.092 2.205 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.08801.08571.08801.50392.45093.68293.72404.75742.64993.0891
H21.08801.77061.76012.13942.74494.04084.25595.29433.32783.8184
H31.08571.77061.77062.13733.35564.41754.16015.10202.83502.8794
H41.08801.76011.77062.13932.74404.04034.25595.29443.32833.8193
C51.50392.13942.13732.13931.36712.28052.22613.27381.37292.1997
O62.45092.74493.35562.74401.36711.41552.16643.18642.22683.2663
N73.68294.04084.41754.04032.28051.41551.31272.05972.29373.3176
C83.72404.25594.16014.25592.22612.16641.31271.07101.45082.2693
H94.75745.29435.10205.29443.27383.18642.05971.07102.27902.7760
C102.64993.32782.83503.32831.37292.22682.29371.45082.27901.0688
H113.08913.81842.87943.81932.19973.26633.31762.26932.77601.0688

picture of Isoxazole, 5-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 O6 117.144 C1 C5 C10 134.133
H2 C1 H3 109.086 H2 C1 H4 107.976
H2 C1 C5 110.226 H3 C1 H4 109.089
H3 C1 C5 110.197 H4 C1 C5 110.220
C5 O6 N7 110.066 C5 C10 C8 104.031
C5 C10 H11 128.116 O6 C5 C10 108.723
O6 N7 C8 105.075 N7 C8 H9 119.214
N7 C8 C10 112.104 C8 C10 H11 127.852
H9 C8 C10 128.681
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.192      
2 H 0.140      
3 H 0.134      
4 H 0.140      
5 C -0.239      
6 O -0.258      
7 N 0.115      
8 C -0.457      
9 H 0.276      
10 C 0.029      
11 H 0.313      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.011 3.762 0.000 4.266
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.273 4.801 -0.000
y 4.801 -37.954 0.000
z -0.000 0.000 -36.888
Traceless
 xyz
x 6.148 4.801 -0.000
y 4.801 -3.874 0.000
z -0.000 0.000 -2.274
Polar
3z2-r2-4.548
x2-y26.681
xy4.801
xz-0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.714 0.525 -0.000
y 0.525 7.131 0.000
z -0.000 0.000 3.918


<r2> (average value of r2) Å2
<r2> 113.070
(<r2>)1/2 10.633