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

using model chemistry: B3LYP/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 B3LYP/3-21G*
 hartrees
Energy at 0K-283.780792
Energy at 298.15K-283.787108
Nuclear repulsion energy220.056706
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 B3LYP/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 3314 3188 0.28      
2 A 3268 3144 1.82      
3 A 3151 3032 5.91      
4 A 3112 2993 6.39      
5 A 3063 2946 7.46      
6 A 1620 1559 28.44      
7 A 1545 1486 19.81      
8 A 1541 1482 9.50      
9 A 1471 1415 6.41      
10 A 1446 1391 23.20      
11 A 1354 1302 6.85      
12 A 1228 1182 18.71      
13 A 1211 1165 9.92      
14 A 1115 1072 9.81      
15 A 1066 1025 5.85      
16 A 1041 1001 1.73      
17 A 959 922 7.13      
18 A 934 899 1.44      
19 A 930 895 5.14      
20 A 848 816 47.90      
21 A 820 789 9.30      
22 A 659 634 1.27      
23 A 648 623 0.49      
24 A 607 583 1.47      
25 A 322 309 2.22      
26 A 245 235 3.47      
27 A 88 84 1.12      

Unscaled Zero Point Vibrational Energy (zpe) 18801.3 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 18086.8 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 B3LYP/3-21G*
ABC
0.30011 0.11487 0.08439

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.129 0.017 0.000
H2 -2.483 -0.522 0.886
H3 -2.559 1.021 -0.001
H4 -2.483 -0.523 -0.885
C5 -0.639 0.097 0.000
O6 0.063 -1.096 -0.000
N7 1.515 -0.769 0.000
C8 1.530 0.557 0.000
H9 2.481 1.065 0.000
C10 0.230 1.149 -0.000
H11 -0.010 2.196 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09561.09211.09561.49162.45783.72733.69784.72732.61623.0389
H21.09561.78101.77022.13732.75594.10234.24865.28643.30733.7799
H31.09211.78101.78102.13003.36934.44944.11435.03982.79172.8061
H41.09561.77021.78102.13722.75524.10204.24875.28663.30763.7804
C51.49162.13732.13002.13721.38442.32182.21703.26691.36432.1909
O62.45782.75593.36932.75521.38441.48852.21013.24322.25103.2929
N73.72734.10234.44944.10202.32181.48851.32632.07312.30843.3345
C83.69784.24864.11434.24872.21702.21011.32631.07861.42772.2490
H94.72735.28645.03985.28663.26693.24322.07311.07862.25242.7363
C102.61623.30732.79173.30761.36432.25102.30841.42772.25241.0746
H113.03893.77992.80613.78042.19093.29293.33452.24902.73631.0746

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 117.380 C1 C5 C10 132.670
H2 C1 H3 108.996 H2 C1 H4 107.766
H2 C1 C5 110.465 H3 C1 H4 108.998
H3 C1 C5 110.101 H4 C1 C5 110.460
C5 O6 N7 107.780 C5 C10 C8 105.104
C5 C10 H11 127.474 O6 C5 C10 109.950
O6 N7 C8 103.320 N7 C8 H9 118.726
N7 C8 C10 113.846 C8 C10 H11 127.422
H9 C8 C10 127.428
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.623      
2 H 0.236      
3 H 0.217      
4 H 0.236      
5 C 0.382      
6 O -0.380      
7 N -0.224      
8 C 0.067      
9 H 0.234      
10 C -0.337      
11 H 0.193      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.925 2.832 0.000 3.424
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.734 3.760 -0.000
y 3.760 -35.738 -0.000
z -0.000 -0.000 -36.292
Traceless
 xyz
x 5.281 3.760 -0.000
y 3.760 -2.226 -0.000
z -0.000 -0.000 -3.056
Polar
3z2-r2-6.111
x2-y25.004
xy3.760
xz-0.000
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.966 0.460 -0.001
y 0.460 6.735 -0.001
z -0.001 -0.001 3.160


<r2> (average value of r2) Å2
<r2> 139.217
(<r2>)1/2 11.799