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

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-284.505074
Energy at 298.15K-284.511522
HF Energy-283.631044
Nuclear repulsion energy223.910064
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 MP3/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3337 3132 0.08      
2 A 3307 3104 3.77      
3 A 3211 3013 7.41      
4 A 3187 2991 6.79      
5 A 3115 2924 9.78      
6 A 1721 1616 31.56      
7 A 1591 1493 34.44      
8 A 1552 1457 7.26      
9 A 1534 1440 8.10      
10 A 1474 1384 2.27      
11 A 1425 1337 11.94      
12 A 1319 1238 23.61      
13 A 1255 1178 9.31      
14 A 1099 1031 2.63      
15 A 1089 1022 3.30      
16 A 1071 1005 14.47      
17 A 1040 976 2.06      
18 A 981 921 14.94      
19 A 952 893 12.19      
20 A 884 830 12.44      
21 A 784 736 30.17      
22 A 677 636 0.50      
23 A 645 605 1.19      
24 A 636 597 3.32      
25 A 340 319 2.17      
26 A 253 237 2.31      
27 A 111 104 0.77      

Unscaled Zero Point Vibrational Energy (zpe) 19293.6 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 18109.0 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 MP3/6-31G*
ABC
0.30881 0.11890 0.08725

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.105 0.013 0.000
H2 -2.454 -0.527 0.885
H3 -2.547 1.012 -0.000
H4 -2.454 -0.527 -0.885
C5 -0.619 0.117 -0.000
O6 0.064 -1.050 -0.000
N7 1.428 -0.790 0.000
C8 1.532 0.516 0.000
H9 2.517 0.963 0.000
C10 0.257 1.154 0.000
H11 0.038 2.211 -0.001

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09391.09181.09391.48992.41633.62373.67174.71902.62383.0704
H21.09391.77771.77032.13632.71993.99024.21355.26403.31033.8068
H31.09181.77771.77782.12493.32714.36414.10845.06392.80732.8496
H41.09391.77031.77782.13632.71963.99014.21355.26423.31053.8067
C51.48992.13632.12492.13631.35302.23942.18753.24821.35782.1947
O62.41632.71993.32712.71961.35301.38862.14613.17322.21333.2618
N73.62373.99024.36413.99012.23941.38861.30952.06342.26983.3074
C83.67174.21354.10844.21352.18752.14611.30951.08211.42582.2597
H94.71905.26405.06395.26423.24823.17322.06341.08212.26812.7755
C102.62383.31032.80733.31051.35782.21332.26981.42582.26811.0793
H113.07043.80682.84963.80672.19473.26183.30742.25972.77551.0793

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 116.329 C1 C5 C10 134.207
H2 C1 H3 108.849 H2 C1 H4 108.033
H2 C1 C5 110.618 H3 C1 H4 108.851
H3 C1 C5 109.822 H4 C1 C5 110.615
C5 O6 N7 109.527 C5 C10 C8 103.574
C5 C10 H11 128.104 O6 C5 C10 109.464
O6 N7 C8 105.345 N7 C8 H9 118.946
N7 C8 C10 112.090 C8 C10 H11 128.322
H9 C8 C10 128.964
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability