return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H5NO (3-Methylisoxazole)

using model chemistry: HF/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF/6-311G*
 hartrees
Energy at 0K-283.690686
Energy at 298.15K-283.697481
Nuclear repulsion energy226.162867
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 HF/6-311G*
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 3450 3121 3.99      
2 A 3426 3098 0.65      
3 A 3291 2976 15.84      
4 A 3249 2939 28.01      
5 A 3197 2891 23.56      
6 A 1813 1639 41.34      
7 A 1651 1493 22.52      
8 A 1620 1465 7.39      
9 A 1616 1462 7.93      
10 A 1580 1429 62.92      
11 A 1540 1392 7.51      
12 A 1406 1272 6.81      
13 A 1268 1147 24.20      
14 A 1193 1079 8.07      
15 A 1169 1057 1.73      
16 A 1132 1024 3.00      
17 A 1066 964 49.66      
18 A 1051 951 3.31      
19 A 1032 933 0.79      
20 A 999 903 8.03      
21 A 874 790 52.52      
22 A 729 659 0.75      
23 A 703 636 8.82      
24 A 653 591 8.76      
25 A 360 325 7.39      
26 A 300 271 5.61      
27 A 139 126 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 20252.9 cm-1
Scaled (by 0.9044) Zero Point Vibrational Energy (zpe) 18316.7 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 HF/6-311G*
ABC
0.31508 0.11958 0.08808

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.120 0.029 0.000
H2 -2.498 0.545 -0.876
H3 -2.500 -0.982 0.000
H4 -2.497 0.544 0.876
C5 1.473 0.552 0.000
O6 1.349 -0.758 0.000
N7 0.029 -1.083 -0.000
C8 -0.625 0.018 -0.000
C9 0.271 1.139 -0.000
H10 0.034 2.181 -0.000
H11 2.472 0.934 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 C9 H10 H11
C11.08431.08081.08433.63043.55762.42011.49522.63563.04464.6798
H21.08431.76051.75254.06574.15513.13082.13362.96383.13935.0609
H31.08081.76051.76054.25853.85562.53102.12513.48944.05325.3281
H41.08431.75251.76054.06564.15493.13082.13362.96393.13945.0607
C53.63044.06574.25854.06561.31652.18142.16441.33742.17301.0696
O63.55764.15513.85564.15491.31651.35962.12132.18253.22032.0310
N72.42013.13082.53103.13082.18141.35961.28072.23543.26443.1681
C81.49522.13362.12512.13362.16442.12131.28071.43492.26143.2292
C92.63562.96383.48942.96391.33742.18252.23541.43491.06872.2103
H103.04463.13934.05323.13942.17303.22033.26442.26141.06872.7377
H114.67985.06095.32815.06071.06962.03103.16813.22922.21032.7377

picture of 3-Methylisoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C8 N7 121.152 C1 C8 C9 128.172
H2 C1 H3 108.805 H2 C1 H4 107.829
H2 C1 C8 110.605 H3 C1 H4 108.804
H3 C1 C8 110.130 H4 C1 C8 110.604
C5 O6 N7 109.197 C5 C9 C8 102.598
C5 C9 H10 128.809 O6 C5 C9 110.650
O6 C5 H11 116.306 O6 N7 C8 106.879
N7 C8 C9 110.676 C8 C9 H10 128.594
C9 C5 H11 133.045
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.667 -0.257   -0.609
2 H 0.231 0.071   0.162
3 H 0.252 0.079   0.163
4 H 0.231 0.071   0.162
5 C 0.160 0.227   0.263
6 O -0.281 -0.122   -0.136
7 N -0.189 -0.469   -0.479
8 C 0.323 0.617   0.785
9 C -0.543 -0.517   -0.682
10 H 0.228 0.193   0.253
11 H 0.254 0.108   0.118


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.543 3.217 0.000 3.263
CHELPG        
AIM        
ESP -0.521 3.195 0.001 3.237


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.469 2.344 0.000
y 2.344 -36.957 -0.000
z 0.000 -0.000 -36.538
Traceless
 xyz
x 7.279 2.344 0.000
y 2.344 -3.953 -0.000
z 0.000 -0.000 -3.326
Polar
3z2-r2-6.651
x2-y27.488
xy2.344
xz0.000
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.644 -0.118 0.000
y -0.118 6.963 0.000
z 0.000 0.000 4.268


<r2> (average value of r2) Å2
<r2> 134.761
(<r2>)1/2 11.609