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

using model chemistry: BLYP/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 BLYP/3-21G
 hartrees
Energy at 0K-283.690491
Energy at 298.15K-283.696609
Nuclear repulsion energy217.581509
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 BLYP/3-21G
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 3223 3205 0.40      
2 A 3174 3157 2.52      
3 A 3070 3053 7.18      
4 A 3027 3010 9.28      
5 A 2984 2968 10.85      
6 A 1560 1551 18.27      
7 A 1505 1497 8.50      
8 A 1504 1496 23.35      
9 A 1430 1422 4.32      
10 A 1378 1370 21.01      
11 A 1304 1297 6.11      
12 A 1176 1169 11.12      
13 A 1158 1151 10.26      
14 A 1079 1073 7.59      
15 A 1036 1030 5.10      
16 A 1003 997 1.36      
17 A 914 909 6.21      
18 A 890 885 5.02      
19 A 879 874 2.25      
20 A 803 798 43.42      
21 A 745 741 7.23      
22 A 631 627 1.27      
23 A 621 618 0.44      
24 A 576 573 1.47      
25 A 310 309 1.81      
26 A 232 231 3.10      
27 A 76 75 0.98      

Unscaled Zero Point Vibrational Energy (zpe) 18142.5 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 18042.7 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 BLYP/3-21G
ABC
0.29301 0.11249 0.08256

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.148 0.019 0.000
H2 2.509 -0.523 -0.890
H3 2.575 1.032 -0.001
H4 2.509 -0.521 0.891
C5 0.647 0.096 -0.000
O6 -0.058 -1.116 -0.000
N7 -1.544 -0.774 0.000
C8 -1.539 0.569 0.000
H9 -2.493 1.090 0.000
C10 -0.230 1.157 -0.000
H11 0.016 2.211 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.10311.09941.10311.50322.48093.77603.72774.76272.63653.0578
H21.10311.79271.78192.15472.78084.15704.28615.33023.33443.8055
H31.09941.79271.79272.14383.39824.49754.14015.06832.80822.8177
H41.10311.78191.79272.15472.78164.15744.28595.32993.33393.8046
C51.50322.15472.14382.15471.40182.35692.23643.29321.37692.2074
O62.48092.78083.39822.78161.40181.52492.24363.28562.27973.3280
N73.77604.15704.49754.15742.35691.52491.34302.09142.33533.3678
C83.72774.28614.14014.28592.23642.24361.34301.08671.43462.2612
H94.76275.33025.06835.32993.29323.28562.09141.08672.26352.7478
C102.63653.33442.80823.33391.37692.27972.33531.43462.26351.0823
H113.05783.80552.81773.80462.20743.32803.36782.26122.74781.0823

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 117.261 C1 C5 C10 132.484
H2 C1 H3 108.961 H2 C1 H4 107.730
H2 C1 C5 110.592 H3 C1 H4 108.959
H3 C1 C5 109.949 H4 C1 C5 110.594
C5 O6 N7 107.205 C5 C10 C8 105.377
C5 C10 H11 127.285 O6 C5 C10 110.255
O6 N7 C8 102.763 N7 C8 H9 118.421
N7 C8 C10 114.400 C8 C10 H11 127.338
H9 C8 C10 127.179
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.592      
2 H 0.221      
3 H 0.204      
4 H 0.221      
5 C 0.352      
6 O -0.331      
7 N -0.221      
8 C 0.061      
9 H 0.210      
10 C -0.291      
11 H 0.167      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.903 2.659 0.000 3.270
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.848 -3.606 0.000
y -3.606 -35.586 0.000
z 0.000 0.000 -36.301
Traceless
 xyz
x 5.096 -3.606 0.000
y -3.606 -2.012 0.000
z 0.000 0.000 -3.084
Polar
3z2-r2-6.168
x2-y24.738
xy-3.606
xz0.000
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> 141.722
(<r2>)1/2 11.905