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

using model chemistry: B3LYP/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 B3LYP/CEP-31G*
 hartrees
Energy at 0K-51.430895
Energy at 298.15K-51.437205
Nuclear repulsion energy115.811121
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/CEP-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 3268 3156 0.27      
2 A 3229 3118 3.86      
3 A 3150 3042 17.70      
4 A 3119 3012 17.24      
5 A 3058 2953 19.62      
6 A 1638 1582 36.66      
7 A 1517 1465 45.71      
8 A 1486 1435 10.07      
9 A 1475 1424 9.38      
10 A 1412 1364 2.01      
11 A 1362 1315 7.41      
12 A 1256 1213 27.69      
13 A 1198 1157 12.13      
14 A 1056 1020 5.99      
15 A 1044 1008 5.39      
16 A 1010 975 8.81      
17 A 987 954 1.88      
18 A 916 885 7.89      
19 A 908 877 4.28      
20 A 890 860 17.76      
21 A 829 801 62.01      
22 A 645 623 0.41      
23 A 632 611 2.10      
24 A 616 595 0.85      
25 A 320 309 2.31      
26 A 245 237 3.09      
27 A 107 103 0.91      

Unscaled Zero Point Vibrational Energy (zpe) 18686.7 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 18045.8 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 B3LYP/CEP-31G*
ABC
0.30101 0.11541 0.08477

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.101 0.033 0.000
H2 -2.463 -0.506 0.893
H3 -2.528 1.048 -0.000
H4 -2.463 -0.507 -0.892
C5 -0.592 0.113 0.000
O6 0.087 -1.067 -0.000
N7 1.482 -0.817 0.000
C8 1.592 0.505 -0.000
H9 2.593 0.940 -0.000
C10 0.310 1.168 -0.000
H11 0.093 2.234 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.10361.10061.10361.51162.44943.68273.72334.78092.66523.1078
H21.10361.79321.78462.16362.75984.05684.27345.33383.36003.8519
H31.10061.79321.79332.14983.36284.42184.15515.12142.84032.8765
H41.10361.78461.79332.16342.75924.05664.27335.33383.36013.8521
C51.51162.16362.14982.16341.36082.27252.21873.29031.38822.2288
O62.44942.75983.36282.75921.36081.41692.17543.20982.24543.3001
N73.68274.05684.42184.05662.27251.41691.32592.07832.30453.3514
C83.72334.27344.15514.27332.21872.17541.32591.09141.44312.2880
H94.78095.33385.12145.33383.29033.20982.07831.09142.29382.8143
C102.66523.36002.84033.36011.38822.24542.30451.44312.29381.0876
H113.10783.85192.87653.85212.22883.30013.35142.28802.81431.0876

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 116.929 C1 C5 C10 133.543
H2 C1 H3 108.883 H2 C1 H4 107.903
H2 C1 C5 110.679 H3 C1 H4 108.887
H3 C1 C5 109.767 H4 C1 C5 110.668
C5 O6 N7 109.784 C5 C10 C8 103.174
C5 C10 H11 127.967 O6 C5 C10 109.528
O6 N7 C8 104.915 N7 C8 H9 118.261
N7 C8 C10 112.599 C8 C10 H11 128.859
H9 C8 C10 129.141
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.345      
2 H 0.167      
3 H 0.173      
4 H 0.167      
5 C -0.326      
6 O -0.039      
7 N 0.093      
8 C -0.595      
9 H 0.308      
10 C 0.053      
11 H 0.343      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.964 2.749 -0.000 3.379
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.820 3.857 -0.001
y 3.857 -35.336 -0.000
z -0.001 -0.000 -35.996
Traceless
 xyz
x 4.847 3.857 -0.001
y 3.857 -1.928 -0.000
z -0.001 -0.000 -2.918
Polar
3z2-r2-5.837
x2-y24.517
xy3.857
xz-0.001
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.847 0.346 0.003
y 0.346 7.508 0.000
z 0.003 0.000 4.326


<r2> (average value of r2) Å2
<r2> 112.897
(<r2>)1/2 10.625