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/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-283.672158
Energy at 298.15K-283.678933
Nuclear repulsion energy226.125297
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/aug-cc-pVDZ
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 3435 3128 0.27      
2 A 3400 3096 5.85      
3 A 3283 2989 14.62      
4 A 3255 2964 11.75      
5 A 3187 2902 16.62      
6 A 1796 1635 45.58      
7 A 1700 1548 93.40      
8 A 1585 1443 6.79      
9 A 1573 1432 7.01      
10 A 1519 1384 4.79      
11 A 1487 1354 12.68      
12 A 1363 1241 39.99      
13 A 1303 1187 12.51      
14 A 1151 1048 1.91      
15 A 1134 1033 11.00      
16 A 1106 1007 12.01      
17 A 1087 990 0.03      
18 A 1039 946 14.37      
19 A 1026 934 5.28      
20 A 999 910 24.11      
21 A 861 784 51.21      
22 A 701 639 0.69      
23 A 701 638 1.25      
24 A 690 629 2.33      
25 A 359 327 2.75      
26 A 276 251 2.84      
27 A 139 127 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 20077.7 cm-1
Scaled (by 0.9106) Zero Point Vibrational Energy (zpe) 18282.8 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 HF/aug-cc-pVDZ
ABC
0.31721 0.12042 0.08873

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/aug-cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.096 0.011 -0.000
H2 -2.437 -0.529 0.883
H3 -2.535 1.005 -0.000
H4 -2.437 -0.529 -0.883
C5 -0.609 0.109 0.000
O6 0.069 -1.031 0.000
N7 1.410 -0.777 -0.000
C8 1.527 0.500 -0.000
H9 2.510 0.941 -0.000
C10 0.252 1.147 0.000
H11 0.030 2.198 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.08951.08681.08951.49042.40293.59363.65624.69942.60843.0496
H21.08951.77271.76532.12822.70463.95534.19025.23653.28943.7814
H31.08681.77271.77272.12423.30554.32864.09305.04532.78992.8277
H41.08951.76531.77272.12822.70453.95524.19015.23643.28953.7815
C51.49042.12822.12422.12821.32612.20472.17183.22841.34892.1844
O62.40292.70463.30552.70451.32611.36462.11443.13802.18593.2289
N73.59363.95534.32863.95522.20471.36461.28302.04022.24613.2796
C83.65624.19024.09304.19012.17182.11441.28301.07731.43012.2635
H94.69945.23655.04535.23643.22843.13802.04021.07732.26812.7811
C102.60843.28942.78993.28951.34892.18592.24611.43012.26811.0736
H113.04963.78142.82773.78152.18443.22893.27962.26352.78111.0736

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 116.996 C1 C5 C10 133.408
H2 C1 H3 109.083 H2 C1 H4 108.221
H2 C1 C5 110.192 H3 C1 H4 109.083
H3 C1 C5 110.032 H4 C1 C5 110.191
C5 O6 N7 110.038 C5 C10 C8 102.756
C5 C10 H11 128.408 O6 C5 C10 109.597
O6 N7 C8 105.958 N7 C8 H9 119.365
N7 C8 C10 111.651 C8 C10 H11 128.836
H9 C8 C10 128.983
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.501      
2 H 0.047      
3 H -0.040      
4 H 0.047      
5 C 0.020      
6 O -0.921      
7 N -0.274      
8 C 0.628      
9 H -0.200      
10 C 0.552      
11 H -0.361      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.938 2.840 -0.000 3.439
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.423 4.103 0.000
y 4.103 -36.204 -0.001
z 0.000 -0.001 -36.778
Traceless
 xyz
x 5.068 4.103 0.000
y 4.103 -2.104 -0.001
z 0.000 -0.001 -2.964
Polar
3z2-r2-5.928
x2-y24.781
xy4.103
xz0.000
yz-0.001


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> 134.308
(<r2>)1/2 11.589