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

using model chemistry: PBEPBE/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 PBEPBE/6-31G*
 hartrees
Energy at 0K-285.025026
Energy at 298.15K-285.031229
Nuclear repulsion energy222.219502
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 PBEPBE/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 3223 3177 0.40      
2 A 3186 3141 4.23      
3 A 3095 3051 6.59      
4 A 3055 3011 7.16      
5 A 2994 2951 13.81      
6 A 1607 1584 32.31      
7 A 1483 1462 34.89      
8 A 1468 1447 9.79      
9 A 1455 1434 8.49      
10 A 1389 1369 0.69      
11 A 1341 1322 5.56      
12 A 1237 1219 15.60      
13 A 1184 1167 9.44      
14 A 1040 1025 4.64      
15 A 1036 1021 4.15      
16 A 997 983 8.86      
17 A 973 959 0.76      
18 A 911 898 7.98      
19 A 868 856 12.73      
20 A 855 843 5.44      
21 A 768 757 30.16      
22 A 648 639 0.30      
23 A 626 617 2.94      
24 A 621 612 0.38      
25 A 324 319 1.97      
26 A 241 238 1.97      
27 A 78 77 0.74      

Unscaled Zero Point Vibrational Energy (zpe) 18352.0 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 18089.6 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 PBEPBE/6-31G*
ABC
0.30366 0.11739 0.08604

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.114 0.016 0.000
H2 2.478 -0.528 -0.889
H3 2.560 1.021 -0.000
H4 2.478 -0.527 0.890
C5 0.627 0.113 -0.000
O6 -0.062 -1.061 0.000
N7 -1.447 -0.796 0.000
C8 -1.535 0.525 -0.000
H9 -2.526 0.981 -0.000
C10 -0.262 1.161 -0.000
H11 -0.036 2.225 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.10381.10031.10381.49082.42853.65253.68444.73992.63783.0833
H21.10381.78801.77922.15142.74394.03334.24285.30193.33913.8328
H31.10031.78801.78802.13643.34904.40014.12505.08672.82552.8619
H41.10381.77921.78802.15152.74434.03344.24275.30183.33883.8324
C51.49082.15142.13642.15151.36122.26402.20033.27031.37412.2139
O62.42852.74393.34902.74431.36121.40942.16413.20012.23113.2864
N73.65254.03334.40014.03342.26401.40941.32432.07952.28823.3347
C83.68444.24284.12504.24272.20032.16411.32431.09141.42302.2664
H94.73995.30195.08675.30183.27033.20012.07951.09142.27162.7837
C102.63783.33912.82553.33881.37412.23112.28821.42302.27161.0878
H113.08333.83282.86193.83242.21393.28643.33472.26642.78371.0878

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 116.673 C1 C5 C10 134.023
H2 C1 H3 108.427 H2 C1 H4 107.397
H2 C1 C5 111.155 H3 C1 H4 108.426
H3 C1 C5 110.171 H4 C1 C5 111.156
C5 O6 N7 109.588 C5 C10 C8 103.732
C5 C10 H11 127.744 O6 C5 C10 109.304
O6 N7 C8 104.632 N7 C8 H9 118.505
N7 C8 C10 112.743 C8 C10 H11 128.524
H9 C8 C10 128.752
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.574      
2 H 0.199      
3 H 0.187      
4 H 0.199      
5 C 0.393      
6 O -0.327      
7 N -0.161      
8 C 0.030      
9 H 0.169      
10 C -0.266      
11 H 0.153      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.934 2.443 -0.000 3.115
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.993 -3.417 0.000
y -3.417 -34.955 -0.000
z 0.000 -0.000 -35.629
Traceless
 xyz
x 4.299 -3.417 0.000
y -3.417 -1.644 -0.000
z 0.000 -0.000 -2.655
Polar
3z2-r2-5.309
x2-y23.962
xy-3.417
xz0.000
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.754 -0.380 0.000
y -0.380 7.368 -0.000
z 0.000 -0.000 3.931


<r2> (average value of r2) Å2
<r2> 137.136
(<r2>)1/2 11.710