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

using model chemistry: MP2/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 MP2/cc-pVDZ
 hartrees
Energy at 0K-284.537572
Energy at 298.15K-284.543962
HF Energy-283.650761
Nuclear repulsion energy222.750120
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 MP2/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 3324 3166 0.23      
2 A 3294 3137 1.50      
3 A 3210 3058 5.36      
4 A 3185 3034 5.63      
5 A 3095 2948 14.44      
6 A 1654 1576 24.40      
7 A 1498 1427 22.22      
8 A 1486 1415 4.22      
9 A 1473 1403 7.78      
10 A 1412 1345 2.70      
11 A 1370 1305 11.01      
12 A 1301 1240 11.40      
13 A 1200 1143 8.38      
14 A 1062 1011 1.84      
15 A 1058 1008 2.33      
16 A 1031 982 18.08      
17 A 1010 962 1.49      
18 A 950 905 8.19      
19 A 926 882 10.09      
20 A 873 832 5.30      
21 A 810 772 33.93      
22 A 664 633 0.53      
23 A 646 615 1.15      
24 A 639 609 0.69      
25 A 328 313 1.67      
26 A 249 237 2.31      
27 A 93 89 0.70      

Unscaled Zero Point Vibrational Energy (zpe) 18920.5 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 18021.8 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 MP2/cc-pVDZ
ABC
0.30371 0.11809 0.08642

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.113 0.016 -0.000
H2 2.470 -0.525 -0.891
H3 2.552 1.024 -0.000
H4 2.470 -0.524 0.892
C5 0.624 0.114 -0.000
O6 -0.065 -1.055 0.000
N7 -1.425 -0.804 -0.000
C8 -1.539 0.523 0.000
H9 -2.538 0.960 -0.000
C10 -0.267 1.164 -0.000
H11 -0.039 2.227 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.10191.09981.10191.49232.42703.63203.68664.74542.64263.0856
H21.10191.78881.78272.14752.73944.00604.23855.29903.33783.8295
H31.09981.78881.78882.13203.34234.37734.12105.08982.82272.8564
H41.10191.78271.78882.14752.73954.00614.23835.29883.33763.8291
C51.49232.14752.13202.14751.35682.24552.20083.27271.37702.2148
O62.42702.73943.34232.73951.35681.38302.15883.18942.22763.2822
N73.63204.00604.37734.00612.24551.38301.33222.08572.28333.3335
C83.68664.23854.12104.23832.20082.15881.33221.09041.42352.2702
H94.74545.29905.08985.29883.27273.18942.08571.09042.27932.8017
C102.64263.33782.82273.33761.37702.22762.28331.42352.27931.0879
H113.08563.82952.85643.82912.21483.28223.33352.27022.80171.0879

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 116.749 C1 C5 C10 134.107
H2 C1 H3 108.674 H2 C1 H4 107.977
H2 C1 C5 110.853 H3 C1 H4 108.675
H3 C1 C5 109.747 H4 C1 C5 110.848
C5 O6 N7 110.085 C5 C10 C8 103.590
C5 C10 H11 127.538 O6 C5 C10 109.144
O6 N7 C8 105.318 N7 C8 H9 118.506
N7 C8 C10 111.863 C8 C10 H11 128.871
H9 C8 C10 129.631
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability