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

using model chemistry: HF/STO-3G

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/STO-3G
 hartrees
Energy at 0K-280.082877
Energy at 298.15K-280.089333
Nuclear repulsion energy222.710801
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/STO-3G
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 3796 3100 31.36      
2 A 3762 3072 0.71      
3 A 3755 3066 8.29      
4 A 3737 3051 0.57      
5 A 3570 2915 0.02      
6 A 1952 1594 22.91      
7 A 1805 1474 5.42      
8 A 1797 1467 3.41      
9 A 1761 1438 10.36      
10 A 1701 1389 13.31      
11 A 1614 1318 6.65      
12 A 1486 1213 8.01      
13 A 1379 1126 18.05      
14 A 1298 1060 17.07      
15 A 1260 1028 5.16      
16 A 1189 971 2.61      
17 A 1177 961 0.01      
18 A 1114 910 6.57      
19 A 1063 868 0.01      
20 A 1045 853 7.45      
21 A 980 800 13.22      
22 A 740 604 1.50      
23 A 720 588 2.95      
24 A 663 541 0.15      
25 A 354 289 0.97      
26 A 284 232 0.42      
27 A 88 72 0.34      

Unscaled Zero Point Vibrational Energy (zpe) 22044.7 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 17999.5 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/STO-3G
ABC
0.30578 0.11714 0.08605

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.129 0.009 -0.000
H2 2.474 -0.527 -0.881
H3 2.562 1.004 -0.000
H4 2.474 -0.527 0.882
C5 0.617 0.111 -0.000
O6 -0.091 -1.071 0.000
N7 -1.448 -0.778 0.000
C8 -1.534 0.537 -0.000
H9 -2.500 1.025 -0.000
C10 -0.235 1.148 0.000
H11 -0.007 2.200 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.08791.08531.08791.51502.46803.66193.70054.73882.62403.0597
H21.08791.76871.76292.15212.76574.02734.23945.28453.30503.7907
H31.08531.76871.76872.14053.36784.38804.12285.06232.80122.8344
H41.08791.76291.76872.15212.76594.02734.23945.28453.30493.7905
C51.51502.15212.14052.15211.37712.24782.19283.24841.34272.1802
O62.46802.76573.36782.76591.37711.38832.16063.19332.22373.2711
N73.66194.02734.38804.02732.24781.38831.31772.08752.27613.3072
C83.70054.23944.12284.23942.19282.16061.31771.08231.43552.2568
H94.73885.28455.06235.28453.24843.19332.08751.08232.26822.7552
C102.62403.30502.80123.30491.34272.22372.27611.43552.26821.0754
H113.05973.79072.83443.79052.18023.27113.30722.25682.75521.0754

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 117.075 C1 C5 C10 133.242
H2 C1 H3 108.954 H2 C1 H4 108.243
H2 C1 C5 110.473 H3 C1 H4 108.953
H3 C1 C5 109.702 H4 C1 C5 110.473
C5 O6 N7 108.747 C5 C10 C8 104.192
C5 C10 H11 128.394 O6 C5 C10 109.683
O6 N7 C8 105.930 N7 C8 H9 120.554
N7 C8 C10 111.449 C8 C10 H11 127.414
H9 C8 C10 127.998
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.189      
2 H 0.086      
3 H 0.083      
4 H 0.086      
5 C 0.140      
6 O -0.143      
7 N -0.117      
8 C 0.008      
9 H 0.091      
10 C -0.126      
11 H 0.081      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.720 2.267 -0.000 2.845
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.985 -3.086 0.001
y -3.086 -34.098 0.000
z 0.001 0.000 -32.639
Traceless
 xyz
x 2.384 -3.086 0.001
y -3.086 -2.286 0.000
z 0.001 0.000 -0.098
Polar
3z2-r2-0.196
x2-y23.113
xy-3.086
xz0.001
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.468 -0.489 0.000
y -0.489 4.319 -0.000
z 0.000 -0.000 1.518


<r2> (average value of r2) Å2
<r2> 136.186
(<r2>)1/2 11.670