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

using model chemistry: PBEPBE/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 PBEPBE/3-21G
 hartrees
Energy at 0K-283.449060
Energy at 298.15K-283.455214
Nuclear repulsion energy218.486299
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/3-21G
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 3239 3209 0.24      
2 A 3192 3163 1.96      
3 A 3091 3063 4.31      
4 A 3049 3021 5.43      
5 A 2994 2966 7.39      
6 A 1572 1557 26.95      
7 A 1497 1483 21.62      
8 A 1493 1479 10.67      
9 A 1418 1405 8.30      
10 A 1395 1382 20.15      
11 A 1305 1294 7.05      
12 A 1197 1186 9.85      
13 A 1165 1154 13.31      
14 A 1071 1062 10.07      
15 A 1039 1030 6.44      
16 A 1003 994 2.23      
17 A 928 919 4.36      
18 A 898 890 5.13      
19 A 882 874 2.65      
20 A 806 798 50.30      
21 A 782 775 6.54      
22 A 634 628 0.43      
23 A 634 628 0.85      
24 A 586 581 1.73      
25 A 311 308 2.05      
26 A 236 234 3.76      
27 A 71 70 1.03      

Unscaled Zero Point Vibrational Energy (zpe) 18242.5 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 18076.5 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/3-21G
ABC
0.29430 0.11376 0.08335

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.137 0.018 0.000
H2 -2.497 -0.524 0.893
H3 -2.565 1.032 -0.001
H4 -2.497 -0.525 -0.892
C5 -0.644 0.097 -0.000
O6 0.060 -1.108 -0.000
N7 1.527 -0.777 0.000
C8 1.534 0.565 0.000
H9 2.494 1.078 0.000
C10 0.232 1.158 -0.000
H11 -0.015 2.213 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.10451.10071.10451.49422.46863.74893.71114.74982.62833.0529
H21.10451.79491.78432.14792.77074.12964.26985.31663.32723.8011
H31.10071.79491.79492.13653.38734.47434.12585.05912.80002.8109
H41.10451.78431.79492.14792.77024.12944.26995.31683.32753.8016
C51.49422.14792.13652.14791.39592.34062.22823.28781.37612.2081
O62.46862.77073.38732.77021.39591.50422.23033.27142.27273.3223
N73.74894.12964.47434.12942.34061.50421.34212.09132.32803.3639
C83.71114.26984.12584.26992.22822.23031.34211.08781.43052.2612
H94.74985.31665.05915.31683.28783.27142.09131.08782.26312.7531
C102.62833.32722.80003.32751.37612.27272.32801.43052.26311.0838
H113.05293.80112.81093.80162.20813.32233.36392.26122.75311.0838

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 117.292 C1 C5 C10 132.567
H2 C1 H3 108.969 H2 C1 H4 107.752
H2 C1 C5 110.592 H3 C1 H4 108.970
H3 C1 C5 109.914 H4 C1 C5 110.590
C5 O6 N7 107.564 C5 C10 C8 105.093
C5 C10 H11 127.298 O6 C5 C10 110.141
O6 N7 C8 103.036 N7 C8 H9 118.401
N7 C8 C10 114.166 C8 C10 H11 127.609
H9 C8 C10 127.432
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.669      
2 H 0.249      
3 H 0.232      
4 H 0.249      
5 C 0.341      
6 O -0.331      
7 N -0.223      
8 C 0.032      
9 H 0.241      
10 C -0.323      
11 H 0.201      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.970 2.670 0.000 3.318
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.591 3.649 -0.000
y 3.649 -35.398 -0.000
z -0.000 -0.000 -36.468
Traceless
 xyz
x 5.342 3.649 -0.000
y 3.649 -1.869 -0.000
z -0.000 -0.000 -3.473
Polar
3z2-r2-6.946
x2-y24.807
xy3.649
xz-0.000
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.391 0.428 0.000
y 0.428 6.907 -0.000
z 0.000 -0.000 3.233


<r2> (average value of r2) Å2
<r2> 140.610
(<r2>)1/2 11.858