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

using model chemistry: B1B95/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/3-21G*
 hartrees
Energy at 0K-283.662030
Energy at 298.15K-283.668382
Nuclear repulsion energy221.054754
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 B1B95/3-21G*
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 3335 3184 0.64      
2 A 3293 3144 1.70      
3 A 3179 3036 4.13      
4 A 3141 2999 4.21      
5 A 3081 2942 5.37      
6 A 1637 1563 34.49      
7 A 1540 1471 19.24      
8 A 1535 1466 10.96      
9 A 1466 1400 26.10      
10 A 1463 1397 6.05      
11 A 1359 1297 7.65      
12 A 1240 1184 18.94      
13 A 1222 1167 12.23      
14 A 1111 1061 11.50      
15 A 1070 1022 6.58      
16 A 1041 994 2.45      
17 A 971 927 5.84      
18 A 943 901 2.46      
19 A 931 889 4.97      
20 A 854 815 52.41      
21 A 848 810 9.39      
22 A 660 630 0.81      
23 A 654 625 0.52      
24 A 612 584 1.59      
25 A 320 305 2.45      
26 A 248 237 4.00      
27 A 93 89 1.21      

Unscaled Zero Point Vibrational Energy (zpe) 18922.9 cm-1
Scaled (by 0.9549) Zero Point Vibrational Energy (zpe) 18069.5 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 B1B95/3-21G*
ABC
0.30225 0.11607 0.08520

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.118 0.015 0.000
H2 2.470 -0.524 -0.884
H3 2.549 1.017 -0.000
H4 2.470 -0.523 0.884
C5 0.636 0.098 -0.000
O6 -0.064 -1.089 0.000
N7 -1.502 -0.770 -0.000
C8 -1.523 0.552 0.000
H9 -2.477 1.053 0.000
C10 -0.231 1.147 -0.000
H11 0.009 2.193 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09381.09041.09381.48432.44563.70473.68114.71132.60753.0323
H21.09381.77851.76832.12892.74264.07704.22975.26763.29703.7719
H31.09041.77851.77852.12163.35574.42754.09855.02622.78242.7992
H41.09381.76831.77852.12892.74294.07724.22965.26743.29673.7715
C51.48432.12892.12162.12891.37822.30802.20703.25671.36072.1871
O62.44562.74263.35572.74291.37821.47342.19633.22652.24213.2830
N73.70474.07704.42754.07722.30801.47341.32212.06662.30013.3260
C83.68114.22974.09854.22962.20702.19631.32211.07721.42292.2450
H94.71135.26765.02625.26743.25673.22652.06661.07722.24872.7353
C102.60753.29702.78243.29671.36072.24212.30011.42292.24871.0734
H113.03233.77192.79923.77152.18713.28303.32602.24502.73531.0734

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 117.328 C1 C5 C10 132.789
H2 C1 H3 109.028 H2 C1 H4 107.864
H2 C1 C5 110.415 H3 C1 H4 109.028
H3 C1 C5 110.041 H4 C1 C5 110.416
C5 O6 N7 108.022 C5 C10 C8 104.879
C5 C10 H11 127.533 O6 C5 C10 109.883
O6 N7 C8 103.429 N7 C8 H9 118.585
N7 C8 C10 113.787 C8 C10 H11 127.588
H9 C8 C10 127.628
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.664      
2 H 0.255      
3 H 0.235      
4 H 0.255      
5 C 0.358      
6 O -0.385      
7 N -0.221      
8 C 0.042      
9 H 0.257      
10 C -0.350      
11 H 0.218      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.959 2.859 0.000 3.466
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.437 -3.778 -0.000
y -3.778 -35.536 0.000
z -0.000 0.000 -36.314
Traceless
 xyz
x 5.488 -3.778 -0.000
y -3.778 -2.160 0.000
z -0.000 0.000 -3.327
Polar
3z2-r2-6.654
x2-y25.099
xy-3.778
xz-0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.879 -0.444 0.000
y -0.444 6.695 0.000
z 0.000 0.000 3.163


<r2> (average value of r2) Å2
<r2> 138.041
(<r2>)1/2 11.749