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

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-285.241755
Energy at 298.15K-285.248176
Nuclear repulsion energy224.957187
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 B1B95/6-31G*
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 3326 3157 0.15      
2 A 3289 3122 4.29      
3 A 3193 3031 6.82      
4 A 3157 2997 6.50      
5 A 3089 2932 11.59      
6 A 1685 1600 35.90      
7 A 1564 1485 45.16      
8 A 1517 1440 8.09      
9 A 1504 1427 8.33      
10 A 1439 1366 1.50      
11 A 1406 1335 8.15      
12 A 1301 1235 21.78      
13 A 1233 1171 9.06      
14 A 1078 1023 4.64      
15 A 1074 1020 1.85      
16 A 1042 989 14.95      
17 A 1030 978 0.49      
18 A 965 916 8.34      
19 A 932 885 14.78      
20 A 914 867 4.42      
21 A 810 768 33.39      
22 A 671 637 0.46      
23 A 654 621 3.03      
24 A 651 618 0.36      
25 A 332 315 2.18      
26 A 253 241 2.07      
27 A 101 95 0.80      

Unscaled Zero Point Vibrational Energy (zpe) 19102.7 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 18134.2 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 B1B95/6-31G*
ABC
0.31155 0.12002 0.08806

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.095 0.015 -0.000
H2 2.450 -0.525 -0.882
H3 2.537 1.010 -0.001
H4 2.450 -0.524 0.882
C5 0.617 0.112 -0.000
O6 -0.065 -1.043 0.000
N7 -1.420 -0.789 0.000
C8 -1.523 0.513 -0.000
H9 -2.507 0.959 -0.000
C10 -0.260 1.150 0.000
H11 -0.041 2.205 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09291.08961.09291.48172.40503.60613.65194.69812.61503.0595
H21.09291.77221.76412.13192.71513.97854.19975.24913.30613.7992
H31.08961.77221.77222.12043.31504.34754.09055.04482.80132.8416
H41.09291.76411.77222.13192.71543.97874.19965.24903.30583.7987
C51.48172.13192.12042.13191.34152.22742.17653.23641.35892.1936
O62.40502.71513.31502.71541.34151.37922.13223.15812.20233.2484
N73.60613.97854.34753.97872.22741.37921.30552.05802.25963.2964
C83.65194.19974.09054.19962.17652.13221.30551.08081.41422.2494
H94.69815.24915.04485.24903.23643.15812.05801.08082.25492.7633
C102.61503.30612.80133.30581.35892.20232.25961.41422.25491.0773
H113.05953.79922.84163.79872.19363.24843.29642.24942.76331.0773

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 116.747 C1 C5 C10 133.973
H2 C1 H3 108.583 H2 C1 H4 107.624
H2 C1 C5 110.898 H3 C1 H4 108.582
H3 C1 C5 110.167 H4 C1 C5 110.899
C5 O6 N7 109.898 C5 C10 C8 103.394
C5 C10 H11 128.050 O6 C5 C10 109.279
O6 N7 C8 105.126 N7 C8 H9 118.876
N7 C8 C10 112.303 C8 C10 H11 128.556
H9 C8 C10 128.821
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.561      
2 H 0.203      
3 H 0.190      
4 H 0.203      
5 C 0.393      
6 O -0.366      
7 N -0.155      
8 C 0.029      
9 H 0.187      
10 C -0.299      
11 H 0.175      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.910 2.554 0.000 3.190
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.810 -3.506 0.000
y -3.506 -34.898 0.000
z 0.000 0.000 -35.471
Traceless
 xyz
x 4.375 -3.506 0.000
y -3.506 -1.758 0.000
z 0.000 0.000 -2.617
Polar
3z2-r2-5.234
x2-y24.088
xy-3.506
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.168 -0.396 0.000
y -0.396 7.127 0.000
z 0.000 0.000 3.856


<r2> (average value of r2) Å2
<r2> 134.454
(<r2>)1/2 11.595