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

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-285.251726
Energy at 298.15K-285.258112
Nuclear repulsion energy224.107293
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 B3PW91/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3304 3161 0.51      
2 A 3269 3128 4.48      
3 A 3170 3033 7.67      
4 A 3133 2998 7.23      
5 A 3068 2936 13.09      
6 A 1665 1593 34.39      
7 A 1545 1478 43.82      
8 A 1512 1446 9.74      
9 A 1499 1434 8.61      
10 A 1435 1373 1.13      
11 A 1393 1332 7.58      
12 A 1284 1229 21.52      
13 A 1227 1174 9.29      
14 A 1075 1029 4.88      
15 A 1068 1022 2.80      
16 A 1035 990 12.01      
17 A 1017 973 0.63      
18 A 954 913 7.44      
19 A 926 886 16.13      
20 A 904 865 4.69      
21 A 803 768 34.57      
22 A 667 638 0.36      
23 A 651 623 2.80      
24 A 646 618 0.72      
25 A 334 320 2.22      
26 A 252 241 2.12      
27 A 93 89 0.79      

Unscaled Zero Point Vibrational Energy (zpe) 18964.7 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 18143.5 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 B3PW91/6-31G*
ABC
0.30932 0.11910 0.08740

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.102 0.015 0.000
H2 2.460 -0.526 -0.884
H3 2.546 1.013 -0.000
H4 2.460 -0.525 0.884
C5 0.620 0.112 -0.000
O6 -0.065 -1.048 -0.000
N7 -1.428 -0.790 -0.000
C8 -1.527 0.517 0.000
H9 -2.513 0.966 0.000
C10 -0.260 1.154 -0.000
H11 -0.039 2.211 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09581.09251.09581.48592.41433.62143.66434.71242.62263.0668
H21.09581.77641.76812.13862.72593.99624.21495.26643.31643.8091
H31.09251.77641.77642.12673.32684.36434.10335.05902.80942.8483
H41.09581.76811.77642.13862.72633.99654.21485.26633.31613.8087
C51.48592.13862.12672.13861.34712.23792.18483.24711.36362.1996
O62.41432.72593.32682.72631.34711.38732.14163.17002.21053.2590
N73.62143.99624.36433.99652.23791.38731.31062.06422.26793.3070
C83.66434.21494.10334.21482.18482.14161.31061.08331.41842.2552
H94.71245.26645.05905.26633.24713.17002.06421.08332.26072.7698
C102.62263.31642.80943.31611.36362.21052.26791.41842.26071.0799
H113.06683.80912.84833.80872.19963.25903.30702.25522.76981.0799

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 116.819 C1 C5 C10 133.918
H2 C1 H3 108.533 H2 C1 H4 107.562
H2 C1 C5 110.958 H3 C1 H4 108.532
H3 C1 C5 110.203 H4 C1 C5 110.959
C5 O6 N7 109.841 C5 C10 C8 103.491
C5 C10 H11 127.988 O6 C5 C10 109.263
O6 N7 C8 105.048 N7 C8 H9 118.839
N7 C8 C10 112.357 C8 C10 H11 128.521
H9 C8 C10 128.804
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.592     -0.704
2 H 0.209     0.198
3 H 0.197     0.206
4 H 0.209     0.198
5 C 0.411     0.554
6 O -0.360     -0.097
7 N -0.162     -0.381
8 C 0.027     0.258
9 H 0.193     0.102
10 C -0.312     -0.552
11 H 0.180     0.218


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.932 2.573 0.000 3.218
CHELPG        
AIM        
ESP 1.916 2.553 0.000 3.192


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.788 -3.549 -0.000
y -3.549 -34.909 0.000
z -0.000 0.000 -35.535
Traceless
 xyz
x 4.434 -3.549 -0.000
y -3.549 -1.748 0.000
z -0.000 0.000 -2.686
Polar
3z2-r2-5.372
x2-y24.122
xy-3.549
xz-0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 135.305
(<r2>)1/2 11.632