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-285.182978
Energy at 298.15K-285.189106
Nuclear repulsion energy217.854274
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 3226 3202 0.92      
2 A 3194 3170 3.63      
3 A 3073 3050 11.62      
4 A 3035 3012 12.21      
5 A 2979 2957 16.00      
6 A 1579 1567 30.88      
7 A 1492 1480 14.46      
8 A 1482 1471 9.35      
9 A 1428 1418 25.34      
10 A 1425 1414 2.59      
11 A 1314 1304 5.96      
12 A 1192 1183 16.54      
13 A 1183 1174 8.20      
14 A 1074 1065 6.14      
15 A 1046 1038 4.96      
16 A 1005 997 1.59      
17 A 921 914 6.93      
18 A 890 884 6.47      
19 A 880 873 4.37      
20 A 795 788 36.49      
21 A 685 680 9.92      
22 A 626 621 0.35      
23 A 622 617 1.31      
24 A 580 576 1.36      
25 A 320 317 2.31      
26 A 236 235 2.56      
27 A 89 88 1.23      

Unscaled Zero Point Vibrational Energy (zpe) 18185.4 cm-1
Scaled (by 0.9924) Zero Point Vibrational Energy (zpe) 18047.2 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
0.29465 0.11258 0.08273

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 -2.146 0.020 0.000
H2 -2.511 -0.522 0.889
H3 -2.587 1.028 -0.000
H4 -2.511 -0.522 -0.889
C5 -0.651 0.108 0.000
O6 0.050 -1.104 -0.000
N7 1.529 -0.785 0.000
C8 1.547 0.557 0.000
H9 2.514 1.056 -0.000
C10 0.245 1.159 -0.000
H11 0.014 2.219 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.10361.10021.10361.49772.46613.76233.73164.77302.64843.0825
H21.10361.78851.77762.15632.77234.14564.29245.34143.34913.8321
H31.10021.78851.78852.14413.39074.49854.16145.10122.83592.8618
H41.10361.77761.78852.15632.77224.14564.29255.34153.34913.8321
C51.49772.15632.14412.15631.39952.35602.24303.30311.38102.2133
O62.46612.77233.39072.77221.39951.51372.23593.27672.27133.3230
N73.76234.14564.49854.14562.35601.51371.34212.08812.33033.3649
C83.73164.29244.16144.29252.24302.23591.34211.08791.43462.2613
H94.77305.34145.10125.34153.30313.27672.08811.08792.27062.7565
C102.64843.34912.83593.34911.38102.27132.33031.43462.27061.0848
H113.08253.83212.86183.83212.21333.32303.36492.26132.75651.0848

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 116.644 C1 C5 C10 133.814
H2 C1 H3 108.488 H2 C1 H4 107.292
H2 C1 C5 111.077 H3 C1 H4 108.488
H3 C1 C5 110.309 H4 C1 C5 111.078
C5 O6 N7 107.877 C5 C10 C8 105.603
C5 C10 H11 127.268 O6 C5 C10 109.542
O6 N7 C8 102.897 N7 C8 H9 118.102
N7 C8 C10 114.080 C8 C10 H11 127.128
H9 C8 C10 127.818
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 -0.421      
2 H 0.166      
3 H 0.147      
4 H 0.166      
5 C 0.293      
6 O -0.377      
7 N -0.138      
8 C 0.003      
9 H 0.152      
10 C -0.112      
11 H 0.122      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.996 3.043 0.000 3.640
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.102 3.885 -0.000
y 3.885 -36.298 0.000
z -0.000 0.000 -35.988
Traceless
 xyz
x 5.041 3.885 -0.000
y 3.885 -2.753 0.000
z -0.000 0.000 -2.288
Polar
3z2-r2-4.576
x2-y25.196
xy3.885
xz-0.000
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> 141.708
(<r2>)1/2 11.904