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All results from a given calculation for C4H5NO (3-Methylisoxazole)

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 C1 1A
Energy calculated at HF/3-21G
 hartrees
Energy at 0K-282.038696
Energy at 298.15K-282.045458
Nuclear repulsion energy222.710513
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 3493 3164 0.80      
2 A 3466 3139 0.12      
3 A 3302 2990 4.42      
4 A 3264 2956 11.02      
5 A 3212 2909 9.54      
6 A 1760 1594 27.41      
7 A 1657 1500 10.92      
8 A 1648 1493 11.61      
9 A 1594 1444 16.59      
10 A 1580 1431 5.08      
11 A 1521 1377 44.51      
12 A 1381 1251 5.63      
13 A 1241 1124 6.84      
14 A 1205 1091 9.67      
15 A 1148 1040 4.12      
16 A 1127 1021 15.01      
17 A 1103 999 0.63      
18 A 1050 951 9.40      
19 A 984 891 1.97      
20 A 945 855 34.44      
21 A 933 845 60.98      
22 A 741 671 0.60      
23 A 688 623 9.79      
24 A 618 559 11.53      
25 A 356 323 7.34      
26 A 300 272 5.29      
27 A 135 122 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 20225.5 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 18316.2 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
0.30474 0.11693 0.08585

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.131 0.043 0.000
H2 2.491 0.564 0.880
H3 2.527 -0.962 -0.001
H4 2.491 0.565 -0.879
C5 -1.482 0.594 -0.000
O6 -1.401 -0.763 0.000
N7 -0.001 -1.123 -0.000
C8 0.635 0.002 -0.000
C9 -0.259 1.132 -0.000
H10 0.015 2.159 0.000
H11 -2.457 1.017 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 C9 H10 H11
C11.08381.08061.08383.65413.62232.43031.49652.62572.99214.6903
H21.08381.76231.75854.06894.20473.13572.12962.94213.07365.0462
H31.08061.76231.76234.29973.93252.53312.12323.48484.00635.3626
H41.08381.75851.76234.06884.20503.13602.12962.94173.07285.0460
C53.65414.06894.29974.06881.35902.26692.19781.33662.16621.0636
O63.62234.20473.93254.20501.35901.44502.17452.21293.24732.0700
N72.43033.13572.53313.13602.26691.44501.29232.27023.28263.2577
C81.49652.12962.12322.12962.19782.17451.29231.44112.24493.2547
C92.62572.94213.48482.94171.33662.21292.27021.44111.06282.2019
H102.99213.07364.00633.07282.16623.24733.28262.24491.06282.7238
H114.69035.04625.36265.04601.06362.07003.25773.25472.20192.7238

picture of 3-Methylisoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C8 N7 121.089 C1 C8 C9 126.714
H2 C1 H3 109.015 H2 C1 H4 108.437
H2 C1 C8 110.221 H3 C1 H4 109.015
H3 C1 C8 109.898 H4 C1 C8 110.219
C5 O6 N7 107.851 C5 C9 C8 104.539
C5 C9 H10 128.701 O6 C5 C9 110.358
O6 C5 H11 116.876 O6 N7 C8 105.056
N7 C8 C9 112.197 C8 C9 H10 126.760
C9 C5 H11 132.766
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.616 -0.406   -0.657
2 H 0.235 0.118   0.182
3 H 0.255 0.122   0.182
4 H 0.235 0.118   0.182
5 C 0.264 0.315   0.371
6 O -0.514 -0.236   -0.259
7 N -0.263 -0.425   -0.425
8 C 0.323 0.662   0.777
9 C -0.470 -0.601   -0.726
10 H 0.257 0.223   0.266
11 H 0.291 0.110   0.106


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.041 3.699 0.000 3.842
CHELPG 0.981 3.627 0.000 3.757
AIM        
ESP 0.992 3.642 0.000 3.775


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.665 -3.295 0.001
y -3.295 -37.468 0.000
z 0.001 0.000 -36.927
Traceless
 xyz
x 7.533 -3.295 0.001
y -3.295 -4.172 0.000
z 0.001 0.000 -3.360
Polar
3z2-r2-6.721
x2-y27.803
xy-3.295
xz0.001
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.134 0.096 0.000
y 0.096 6.277 0.000
z 0.000 0.000 3.048


<r2> (average value of r2) Å2
<r2> 137.538
(<r2>)1/2 11.728