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: HF/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF/CEP-121G
 hartrees
Energy at 0K-50.045801
Energy at 298.15K-50.052512
Nuclear repulsion energy116.655707
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 HF/CEP-121G
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 3450 3148 0.54      
2 A 3424 3124 4.63      
3 A 3282 2995 21.88      
4 A 3259 2974 17.99      
5 A 3173 2896 22.19      
6 A 1757 1603 50.25      
7 A 1647 1503 62.10      
8 A 1625 1483 15.70      
9 A 1615 1474 11.21      
10 A 1564 1427 0.33      
11 A 1458 1331 7.37      
12 A 1343 1226 34.34      
13 A 1302 1188 30.12      
14 A 1189 1085 5.03      
15 A 1123 1025 6.23      
16 A 1121 1023 5.52      
17 A 1052 960 11.57      
18 A 1033 943 3.63      
19 A 1014 925 10.61      
20 A 965 881 32.32      
21 A 912 833 71.39      
22 A 692 632 2.26      
23 A 692 631 0.99      
24 A 660 602 0.50      
25 A 349 319 4.20      
26 A 267 244 4.22      
27 A 122 111 1.47      

Unscaled Zero Point Vibrational Energy (zpe) 20045.4 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 18291.4 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 HF/CEP-121G
ABC
0.30857 0.11617 0.08573

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.092 0.030 -0.000
H2 -2.438 -0.506 0.878
H3 -2.527 1.021 -0.001
H4 -2.438 -0.507 -0.877
C5 -0.597 0.118 0.000
O6 0.093 -1.060 -0.000
N7 1.487 -0.800 0.000
C8 1.586 0.504 -0.000
H9 2.555 0.955 -0.000
C10 0.294 1.148 -0.000
H11 0.090 2.195 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.08461.08261.08461.49772.44253.67453.70924.73912.63533.0739
H21.08461.76401.75442.13252.73574.03264.24085.27623.31183.8017
H31.08261.76401.76402.13073.34664.40844.14605.08322.82402.8682
H41.08461.75441.76402.13242.73504.03214.24085.27623.31213.8023
C51.49772.13252.13072.13241.36602.27792.21753.26191.36182.1870
O62.44252.73573.34662.73501.36601.41782.16253.18182.21743.2549
N73.67454.03264.40844.03212.27791.41781.30842.05512.28493.3049
C83.70924.24084.14604.24082.21752.16251.30841.06891.44412.2577
H94.73915.27625.08325.27623.26193.18182.05511.06892.26992.7596
C102.63533.31182.82403.31211.36182.21742.28491.44412.26991.0662
H113.07393.80172.86823.80232.18703.25493.30492.25772.75961.0662

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 116.979 C1 C5 C10 134.262
H2 C1 H3 108.967 H2 C1 H4 107.947
H2 C1 C5 110.309 H3 C1 H4 108.969
H3 C1 C5 110.294 H4 C1 C5 110.302
C5 O6 N7 109.810 C5 C10 C8 104.389
C5 C10 H11 128.102 O6 C5 C10 108.760
O6 N7 C8 104.910 N7 C8 H9 119.307
N7 C8 C10 112.132 C8 C10 H11 127.510
H9 C8 C10 128.562
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.595      
2 H 0.190      
3 H 0.177      
4 H 0.190      
5 C 0.275      
6 O -0.322      
7 N 0.097      
8 C -0.294      
9 H 0.218      
10 C -0.172      
11 H 0.236      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.990 3.656 0.000 4.162
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.247 4.697 -0.000
y 4.697 -37.874 0.000
z -0.000 0.000 -36.940
Traceless
 xyz
x 6.160 4.697 -0.000
y 4.697 -3.781 0.000
z -0.000 0.000 -2.379
Polar
3z2-r2-4.758
x2-y26.627
xy4.697
xz-0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.905 0.558 -0.000
y 0.558 7.457 0.000
z -0.000 0.000 4.479


<r2> (average value of r2) Å2
<r2> 112.474
(<r2>)1/2 10.605