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/TZVP

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/TZVP
 hartrees
Energy at 0K-283.724189
Energy at 298.15K-283.730965
HF Energy-283.724189
Nuclear repulsion energy226.884823
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/TZVP
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 3430 3117 0.29      
2 A 3396 3085 5.44      
3 A 3274 2975 15.01      
4 A 3247 2950 12.15      
5 A 3187 2896 15.72      
6 A 1797 1633 41.59      
7 A 1694 1539 92.63      
8 A 1608 1461 8.19      
9 A 1595 1449 7.86      
10 A 1540 1399 3.81      
11 A 1496 1359 13.55      
12 A 1371 1246 40.17      
13 A 1310 1190 17.62      
14 A 1165 1059 2.18      
15 A 1139 1035 10.73      
16 A 1110 1009 11.81      
17 A 1093 994 0.08      
18 A 1046 950 17.38      
19 A 1036 941 4.32      
20 A 1007 915 23.47      
21 A 876 796 53.65      
22 A 702 638 1.90      
23 A 701 637 0.64      
24 A 692 629 1.44      
25 A 363 330 2.80      
26 A 275 250 2.70      
27 A 133 121 1.03      

Unscaled Zero Point Vibrational Energy (zpe) 20142.0 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 18301.1 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/TZVP
ABC
0.31988 0.12108 0.08928

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/TZVP

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.074 0.012 0.001
H2 -2.445 -0.180 1.004
H3 -2.467 0.961 -0.344
H4 -2.432 -0.778 -0.654
C5 -0.611 0.051 -0.002
O6 0.143 -1.057 -0.001
N7 1.423 -0.718 0.001
C8 1.464 0.560 0.001
H9 2.355 1.082 -0.000
C10 0.211 1.095 -0.001
H11 -0.055 2.093 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.08701.08391.08611.46412.46073.57243.58064.55642.52872.8996
H21.08701.76661.76252.10492.91104.03184.10305.06333.11253.4473
H31.08391.76661.76702.09513.31644.25083.96644.83522.70262.6860
H41.08611.76251.76702.10482.67073.91074.17125.17683.30453.7840
C51.46412.10492.09512.10481.33992.17442.13623.13931.32802.1154
O62.46072.91103.31642.67071.33991.32422.08783.07672.15283.1554
N73.57244.03184.25083.91072.17441.32421.27862.02692.18133.1757
C83.58064.10303.96644.17122.13622.08781.27861.03231.36312.1582
H94.55645.06334.83525.17683.13933.07672.02691.03232.14412.6132
C102.52873.11252.70263.30451.32802.15282.18131.36312.14411.0322
H112.89963.44732.68603.78402.11543.15543.17572.15822.61321.0322

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 122.643 C1 C5 C10 129.766
H2 C1 H3 108.936 H2 C1 H4 108.399
H2 C1 C5 110.330 H3 C1 H4 109.038
H3 C1 C5 109.727 H4 C1 C5 110.374
C5 O6 N7 109.404 C5 C10 C8 105.072
C5 C10 H11 126.883 O6 C5 C10 107.590
O6 N7 C8 106.654 N7 C8 H9 122.230
N7 C8 C10 111.279 C8 C10 H11 128.045
H9 C8 C10 126.491
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.363      
2 H 0.120      
3 H 0.112      
4 H 0.120      
5 C 0.180      
6 O -0.119      
7 N -0.061      
8 C -0.116      
9 H 0.129      
10 C -0.143      
11 H 0.141      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.951 2.884 0.001 3.482
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.399 -4.067 0.002
y -4.067 -36.338 0.002
z 0.002 0.002 -36.470
Traceless
 xyz
x 5.005 -4.067 0.002
y -4.067 -2.403 0.002
z 0.002 0.002 -2.602
Polar
3z2-r2-5.204
x2-y24.939
xy-4.067
xz0.002
yz0.002


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.941 -0.497 0.000
y -0.497 7.595 -0.000
z 0.000 -0.000 5.064


<r2> (average value of r2) Å2
<r2> 133.544
(<r2>)1/2 11.556