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/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-283.731929
Energy at 298.15K-283.738720
Nuclear repulsion energy227.180675
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/6-311+G(3df,2p)
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 3420 3108 0.28      
2 A 3385 3075 5.95      
3 A 3263 2964 14.33      
4 A 3234 2938 11.40      
5 A 3177 2887 15.13      
6 A 1792 1629 42.52      
7 A 1693 1538 96.98      
8 A 1606 1459 8.33      
9 A 1594 1448 7.19      
10 A 1538 1397 4.68      
11 A 1496 1360 12.70      
12 A 1373 1247 38.98      
13 A 1310 1191 14.06      
14 A 1163 1057 2.18      
15 A 1142 1038 12.35      
16 A 1109 1007 11.74      
17 A 1095 995 0.14      
18 A 1049 953 4.10      
19 A 1048 952 14.98      
20 A 1007 915 22.02      
21 A 878 798 51.98      
22 A 711 646 0.83      
23 A 701 637 0.66      
24 A 699 635 2.58      
25 A 361 328 2.71      
26 A 276 251 2.75      
27 A 136 124 0.93      

Unscaled Zero Point Vibrational Energy (zpe) 20128.1 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 18288.4 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/6-311+G(3df,2p)
ABC
0.32060 0.12137 0.08949

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311+G(3df,2p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.088 0.011 -0.000
H2 2.429 -0.526 -0.876
H3 2.527 0.998 -0.000
H4 2.430 -0.525 0.876
C5 0.604 0.107 -0.000
O6 -0.069 -1.026 0.000
N7 -1.405 -0.772 0.000
C8 -1.521 0.498 -0.000
H9 -2.497 0.937 -0.000
C10 -0.250 1.142 0.000
H11 -0.029 2.185 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.08281.08011.08281.48722.39403.57973.64254.67802.59733.0345
H21.08281.76051.75242.12132.69473.94064.17445.21343.27543.7631
H31.08011.76051.76052.11913.29224.31184.07935.02442.78072.8181
H41.08281.75241.76052.12132.69503.94074.17445.21343.27523.7627
C51.48722.12132.11912.12131.31832.19292.16133.21061.34162.1720
O62.39402.69473.29222.69501.31831.35912.10493.12242.17523.2111
N73.57973.94064.31183.94072.19291.35911.27562.02912.23533.2614
C83.64254.17444.07934.17442.16132.10491.27561.07011.42512.2523
H94.67805.21345.02445.21343.21063.12242.02911.07012.25632.7652
C102.59733.27542.78073.27521.34162.17522.23531.42512.25631.0663
H113.03453.76312.81813.76272.17203.21113.26142.25232.76521.0663

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 117.026 C1 C5 C10 133.253
H2 C1 H3 108.977 H2 C1 H4 108.041
H2 C1 C5 110.269 H3 C1 H4 108.976
H3 C1 C5 110.260 H4 C1 C5 110.269
C5 O6 N7 109.971 C5 C10 C8 102.694
C5 C10 H11 128.491 O6 C5 C10 109.721
O6 N7 C8 106.016 N7 C8 H9 119.520
N7 C8 C10 111.598 C8 C10 H11 128.815
H9 C8 C10 128.882
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.105      
2 H 0.145      
3 H 0.131      
4 H 0.145      
5 C 0.742      
6 O -0.720      
7 N -0.611      
8 C 0.317      
9 H 0.168      
10 C -0.356      
11 H 0.145      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.939 2.796 -0.001 3.403
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.384 -4.074 0.001
y -4.074 -36.054 0.000
z 0.001 0.000 -36.559
Traceless
 xyz
x 4.923 -4.074 0.001
y -4.074 -2.083 0.000
z 0.001 0.000 -2.840
Polar
3z2-r2-5.680
x2-y24.670
xy-4.074
xz0.001
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.621 -0.361 0.000
y -0.361 7.941 -0.000
z 0.000 -0.000 5.639


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