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

using model chemistry: B3LYP/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 B3LYP/6-31G
 hartrees
Energy at 0K-285.265137
Energy at 298.15K-285.271480
Nuclear repulsion energy220.506796
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 B3LYP/6-31G
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 3316 3190 0.19      
2 A 3289 3164 1.99      
3 A 3155 3035 9.58      
4 A 3120 3001 9.20      
5 A 3058 2942 12.78      
6 A 1646 1583 37.43      
7 A 1530 1472 13.99      
8 A 1520 1462 10.57      
9 A 1498 1441 31.46      
10 A 1467 1411 1.22      
11 A 1365 1313 6.74      
12 A 1247 1200 22.44      
13 A 1231 1184 10.20      
14 A 1108 1066 7.42      
15 A 1077 1036 5.27      
16 A 1042 1002 2.20      
17 A 969 932 6.99      
18 A 933 898 6.84      
19 A 931 896 3.41      
20 A 836 804 42.12      
21 A 774 745 13.01      
22 A 657 632 0.32      
23 A 650 626 1.33      
24 A 613 590 1.27      
25 A 332 319 2.84      
26 A 249 239 2.91      
27 A 97 93 1.31      

Unscaled Zero Point Vibrational Energy (zpe) 18853.7 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 18137.2 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 B3LYP/6-31G
ABC
0.30180 0.11518 0.08468

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.126 0.017 0.000
H2 2.484 -0.524 -0.883
H3 2.570 1.016 -0.000
H4 2.484 -0.523 0.883
C5 0.642 0.110 -0.000
O6 -0.058 -1.082 -0.000
N7 -1.494 -0.782 0.000
C8 -1.538 0.543 0.000
H9 -2.502 1.028 0.000
C10 -0.246 1.152 -0.000
H11 -0.021 2.205 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09581.09261.09581.48682.44483.70763.70124.73742.62953.0656
H21.09581.77671.76622.13902.74824.08374.25395.29673.32313.8086
H31.09261.77671.77672.12983.36214.44424.13455.07212.81932.8512
H41.09581.76621.77672.13902.74854.08384.25385.29663.32303.8084
C51.48682.13902.12982.13901.38232.31542.22253.27571.36902.1976
O62.44482.74823.36212.74851.38231.46762.19833.22942.24173.2873
N73.70764.08374.44424.08382.31541.46761.32662.07232.30203.3309
C83.70124.25394.13454.25382.22252.19831.32661.07961.42762.2494
H94.73745.29675.07215.29663.27573.22942.07231.07962.25952.7459
C102.62953.32312.81933.32301.36902.24172.30201.42762.25951.0770
H113.06563.80862.85123.80842.19763.28733.33092.24942.74591.0770

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 116.837 C1 C5 C10 134.034
H2 C1 H3 108.554 H2 C1 H4 107.388
H2 C1 C5 110.928 H3 C1 H4 108.553
H3 C1 C5 110.388 H4 C1 C5 110.930
C5 O6 N7 108.636 C5 C10 C8 105.234
C5 C10 H11 127.500 O6 C5 C10 109.129
O6 N7 C8 103.649 N7 C8 H9 118.550
N7 C8 C10 113.352 C8 C10 H11 127.266
H9 C8 C10 128.098
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.453      
2 H 0.182      
3 H 0.161      
4 H 0.182      
5 C 0.316      
6 O -0.425      
7 N -0.130      
8 C -0.001      
9 H 0.180      
10 C -0.167      
11 H 0.155      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.012 3.181 0.000 3.764
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.000 -4.012 0.000
y -4.012 -36.379 -0.000
z 0.000 -0.000 -35.973
Traceless
 xyz
x 5.177 -4.012 0.000
y -4.012 -2.893 -0.000
z 0.000 -0.000 -2.284
Polar
3z2-r2-4.568
x2-y25.380
xy-4.012
xz0.000
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.380 -0.411 0.001
y -0.411 7.203 0.000
z 0.001 0.000 3.589


<r2> (average value of r2) Å2
<r2> 139.045
(<r2>)1/2 11.792