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 (Isoxazole, 5-methyl-)

using model chemistry: BLYP/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 BLYP/6-31G**
 hartrees
Energy at 0K-285.273303
Energy at 298.15K-285.279490
Nuclear repulsion energy221.018249
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 BLYP/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 3203 3179 0.91      
2 A 3163 3139 5.04      
3 A 3070 3046 9.71      
4 A 3029 3006 11.13      
5 A 2977 2954 17.39      
6 A 1585 1573 28.71      
7 A 1464 1453 6.43      
8 A 1457 1446 38.23      
9 A 1451 1440 6.17      
10 A 1387 1376 0.99      
11 A 1326 1315 4.72      
12 A 1210 1200 17.02      
13 A 1177 1168 7.28      
14 A 1039 1031 3.48      
15 A 1030 1022 4.19      
16 A 991 983 5.65      
17 A 960 952 2.96      
18 A 900 893 9.74      
19 A 861 854 4.12      
20 A 805 798 11.90      
21 A 771 765 25.07      
22 A 636 631 0.33      
23 A 623 618 2.48      
24 A 608 603 1.10      
25 A 323 320 1.89      
26 A 239 237 1.61      
27 A 87 86 0.79      

Unscaled Zero Point Vibrational Energy (zpe) 18185.2 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 18045.2 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 BLYP/6-31G**
ABC
0.30160 0.11589 0.08507

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.126 0.017 0.000
H2 -2.489 -0.525 0.889
H3 -2.570 1.022 -0.000
H4 -2.489 -0.526 -0.888
C5 -0.631 0.111 0.000
O6 0.058 -1.070 -0.000
N7 1.468 -0.794 0.000
C8 1.540 0.531 -0.000
H9 2.525 0.998 -0.000
C10 0.258 1.162 -0.000
H11 0.031 2.224 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.10221.09861.10221.49872.44013.68463.70264.75412.64543.0864
H21.10221.78611.77682.15602.75234.06434.25925.31543.34433.8339
H31.09861.78611.78612.14253.35934.42744.13955.09542.83192.8655
H41.10221.77681.78612.15592.75194.06434.25925.31543.34433.8340
C51.49872.15602.14252.15591.36792.28552.21123.27811.37622.2136
O62.44012.75233.35932.75191.36791.43672.18223.21942.24133.2943
N73.68464.06434.42744.06432.28551.43671.32702.08042.29953.3421
C83.70264.25924.13954.25922.21122.18221.32701.09001.42872.2676
H94.75415.31545.09545.31543.27813.21942.08041.09002.27292.7791
C102.64543.34432.83193.34431.37622.24132.29951.42872.27291.0858
H113.08643.83392.86553.83402.21363.29433.34212.26762.77911.0858

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 116.617 C1 C5 C10 133.859
H2 C1 H3 108.498 H2 C1 H4 107.419
H2 C1 C5 111.064 H3 C1 H4 108.501
H3 C1 C5 110.198 H4 C1 C5 111.059
C5 O6 N7 109.135 C5 C10 C8 104.044
C5 C10 H11 127.687 O6 C5 C10 109.524
O6 N7 C8 104.227 N7 C8 H9 118.471
N7 C8 C10 113.071 C8 C10 H11 128.269
H9 C8 C10 128.458
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.351      
2 H 0.132      
3 H 0.117      
4 H 0.132      
5 C 0.371      
6 O -0.337      
7 N -0.178      
8 C 0.119      
9 H 0.094      
10 C -0.169      
11 H 0.072      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.905 2.484 0.000 3.131
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.215 3.440 -0.001
y 3.440 -35.298 0.000
z -0.001 0.000 -35.571
Traceless
 xyz
x 4.220 3.440 -0.001
y 3.440 -1.905 0.000
z -0.001 0.000 -2.314
Polar
3z2-r2-4.629
x2-y24.083
xy3.440
xz-0.001
yz0.000


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


<r2> (average value of r2) Å2
<r2> 138.451
(<r2>)1/2 11.767