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

using model chemistry: LSDA/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 LSDA/3-21G
 hartrees
Energy at 0K-282.258229
Energy at 298.15K-282.264467
Nuclear repulsion energy221.166683
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 LSDA/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 3246 3192 2.20      
2 A 3198 3146 0.83      
3 A 3102 3051 0.96      
4 A 3058 3007 1.35      
5 A 2996 2947 2.62      
6 A 1607 1581 38.91      
7 A 1482 1458 21.70      
8 A 1472 1447 14.51      
9 A 1431 1408 19.23      
10 A 1406 1383 13.59      
11 A 1324 1302 8.30      
12 A 1240 1220 11.33      
13 A 1185 1166 18.44      
14 A 1068 1051 14.92      
15 A 1046 1028 7.00      
16 A 1008 991 6.39      
17 A 957 942 1.86      
18 A 924 909 5.48      
19 A 893 878 2.59      
20 A 829 815 6.08      
21 A 811 798 51.69      
22 A 659 648 0.32      
23 A 651 641 0.42      
24 A 614 604 2.31      
25 A 316 311 2.47      
26 A 243 239 4.15      
27 A 64 63 1.17      

Unscaled Zero Point Vibrational Energy (zpe) 18413.8 cm-1
Scaled (by 0.9836) Zero Point Vibrational Energy (zpe) 18111.8 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 LSDA/3-21G
ABC
0.30087 0.11687 0.08554

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.107 0.018 0.000
H2 2.471 -0.525 -0.890
H3 2.541 1.030 -0.000
H4 2.471 -0.524 0.891
C5 0.637 0.097 -0.000
O6 -0.061 -1.089 0.000
N7 -1.494 -0.774 -0.000
C8 -1.520 0.553 0.000
H9 -2.486 1.054 -0.000
C10 -0.234 1.148 -0.000
H11 0.011 2.204 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.10491.10091.10491.47132.43423.68713.66574.70812.59903.0281
H21.10491.79311.78162.13102.74264.07154.22875.27813.30273.7805
H31.10091.79311.79312.11973.35574.42004.08835.02672.77732.7889
H41.10491.78161.79312.13102.74304.07184.22865.27803.30253.7800
C51.47132.13102.11972.13101.37662.30292.20513.26701.36532.1984
O62.43422.74263.35572.74301.37661.46752.19713.23682.24383.2942
N73.68714.07154.42004.07182.30291.46751.32802.08032.29823.3371
C83.66574.22874.08834.22862.20512.19711.32801.08841.41632.2511
H94.70815.27815.02675.27803.26703.23682.08031.08842.25382.7489
C102.59903.30272.77733.30251.36532.24382.29821.41632.25381.0844
H113.02813.78052.78893.78002.19843.29423.33712.25112.74891.0844

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 117.427 C1 C5 C10 132.735
H2 C1 H3 108.755 H2 C1 H4 107.451
H2 C1 C5 110.820 H3 C1 H4 108.755
H3 C1 C5 110.158 H4 C1 C5 110.821
C5 O6 N7 108.088 C5 C10 C8 104.869
C5 C10 H11 127.264 O6 C5 C10 109.838
O6 N7 C8 103.502 N7 C8 H9 118.506
N7 C8 C10 113.703 C8 C10 H11 127.867
H9 C8 C10 127.791
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.707      
2 H 0.262      
3 H 0.244      
4 H 0.262      
5 C 0.326      
6 O -0.329      
7 N -0.211      
8 C 0.003      
9 H 0.252      
10 C -0.314      
11 H 0.212      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.048 2.675 0.000 3.369
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.523 -3.687 0.000
y -3.687 -35.296 -0.000
z 0.000 -0.000 -36.324
Traceless
 xyz
x 5.287 -3.687 0.000
y -3.687 -1.872 -0.000
z 0.000 -0.000 -3.414
Polar
3z2-r2-6.828
x2-y24.773
xy-3.687
xz0.000
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.181 -0.436 0.000
y -0.436 6.762 -0.000
z 0.000 -0.000 3.234


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000