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

using model chemistry: B3LYP/CEP-121G

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-121G
 hartrees
Energy at 0K-51.354805
Energy at 298.15K-51.361106
Nuclear repulsion energy114.679264
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-121G
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 3264 3180 1.02      
2 A 3231 3148 3.99      
3 A 3115 3035 17.16      
4 A 3083 3005 16.03      
5 A 3008 2931 20.46      
6 A 1605 1564 38.31      
7 A 1506 1468 16.28      
8 A 1496 1458 12.10      
9 A 1460 1423 35.15      
10 A 1440 1404 0.16      
11 A 1329 1295 6.63      
12 A 1219 1188 24.83      
13 A 1198 1168 14.68      
14 A 1082 1055 4.74      
15 A 1052 1025 6.69      
16 A 1018 992 1.55      
17 A 949 925 7.44      
18 A 908 885 6.62      
19 A 903 879 4.43      
20 A 830 809 57.29      
21 A 824 803 15.34      
22 A 640 624 0.40      
23 A 625 609 1.05      
24 A 591 576 0.76      
25 A 323 315 2.97      
26 A 241 235 3.29      
27 A 94 92 1.23      

Unscaled Zero Point Vibrational Energy (zpe) 18515.9 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 18043.8 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-121G
ABC
0.29612 0.11310 0.08312

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.113 0.035 0.000
H2 2.473 -0.504 -0.885
H3 2.547 1.039 -0.000
H4 2.473 -0.504 0.886
C5 0.612 0.120 -0.000
O6 -0.085 -1.092 -0.000
N7 -1.529 -0.813 0.000
C8 -1.596 0.528 0.000
H9 -2.574 0.993 0.000
C10 -0.299 1.161 -0.000
H11 -0.086 2.219 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09721.09451.09721.50362.46963.73903.74194.78412.66203.0994
H21.09721.78101.77112.15302.76924.10954.29015.33823.35253.8401
H31.09451.78101.78102.14273.38664.47704.17475.12152.84872.8850
H41.09721.77111.78102.15312.76944.10964.29015.33813.35243.8399
C51.50362.15302.14272.15311.39772.33492.24553.30361.38362.2125
O62.46962.76923.38662.76941.39771.47062.21613.24762.26363.3115
N73.73904.10954.47704.10962.33491.47061.34342.08732.32613.3584
C83.74194.29014.17474.29012.24552.21611.34341.08281.44342.2675
H94.78415.33825.12155.33813.30363.24762.08731.08282.28142.7742
C102.66203.35252.84873.35241.38362.26362.32611.44342.28141.0794
H113.09943.84012.88503.83992.21253.31153.35842.26752.77421.0794

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 116.645 C1 C5 C10 134.408
H2 C1 H3 108.711 H2 C1 H4 107.631
H2 C1 C5 110.790 H3 C1 H4 108.711
H3 C1 C5 110.129 H4 C1 C5 110.791
C5 O6 N7 108.954 C5 C10 C8 105.163
C5 C10 H11 127.432 O6 C5 C10 108.948
O6 N7 C8 103.819 N7 C8 H9 118.311
N7 C8 C10 113.117 C8 C10 H11 127.404
H9 C8 C10 128.573
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.630      
2 H 0.188      
3 H 0.176      
4 H 0.188      
5 C 0.160      
6 O -0.197      
7 N 0.095      
8 C -0.357      
9 H 0.189      
10 C -0.022      
11 H 0.208      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.029 3.323 0.000 3.894
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.303 -4.256 0.000
y -4.256 -37.070 0.000
z 0.000 0.000 -36.624
Traceless
 xyz
x 5.544 -4.256 0.000
y -4.256 -3.106 0.000
z 0.000 0.000 -2.438
Polar
3z2-r2-4.876
x2-y25.767
xy-4.256
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.179 -0.416 0.004
y -0.416 7.934 0.001
z 0.004 0.001 4.668


<r2> (average value of r2) Å2
<r2> 114.944
(<r2>)1/2 10.721