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All results from a given calculation for C4H5NO (3-Methylisoxazole)

using model chemistry: MP2/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-284.112771
Energy at 298.15K-284.119007
HF Energy-283.522498
Nuclear repulsion energy216.102764
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/LANL2DZ
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 3316 3194 0.27      
2 A 3277 3156 0.33      
3 A 3147 3031 11.49      
4 A 3125 3010 21.89      
5 A 3032 2920 24.81      
6 A 1546 1489 10.50      
7 A 1524 1468 12.31      
8 A 1521 1465 24.12      
9 A 1470 1416 8.31      
10 A 1422 1370 10.81      
11 A 1362 1312 11.11      
12 A 1265 1219 1.54      
13 A 1124 1083 16.69      
14 A 1100 1060 1.57      
15 A 1034 996 12.68      
16 A 994 957 6.65      
17 A 959 924 3.14      
18 A 892 859 1.05      
19 A 838 807 16.12      
20 A 836 805 11.83      
21 A 727 701 64.35      
22 A 635 611 0.36      
23 A 632 609 6.48      
24 A 579 557 5.08      
25 A 326 314 6.29      
26 A 250 241 5.11      
27 A 120 115 0.11      

Unscaled Zero Point Vibrational Energy (zpe) 18525.6 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 17842.0 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 MP2/LANL2DZ
ABC
0.28609 0.11060 0.08100

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.185 0.032 -0.000
H2 2.575 0.547 0.895
H3 2.557 -1.005 -0.001
H4 2.575 0.548 -0.894
C5 -1.529 0.623 -0.000
O6 -1.442 -0.792 -0.000
N7 -0.010 -1.160 0.000
C8 0.665 0.033 -0.000
C9 -0.251 1.166 0.000
H10 0.016 2.218 -0.000
H11 -2.538 1.021 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 C9 H10 H11
C11.10381.10231.10383.76053.71872.49741.51992.68593.07884.8246
H21.10381.79181.78964.20174.32763.22422.17153.02823.18505.2123
H31.10231.79181.79184.39874.00452.57182.15863.54904.10435.4829
H41.10381.78961.79184.20154.32793.22492.17153.02763.18385.2120
C53.76054.20174.39874.20151.41752.34222.27181.38932.22151.0842
O63.71874.32764.00454.32791.41751.47822.26212.29163.34482.1188
N72.49743.22422.57183.22492.34221.47821.37052.33803.37823.3386
C81.51992.17152.15862.17152.27182.26211.37051.45612.27933.3512
C92.68593.02823.54903.02761.38932.29162.33801.45611.08592.2916
H103.07883.18504.10433.18382.22153.34483.37822.27931.08592.8206
H114.82465.21235.48295.21201.08422.11883.33863.35122.29162.8206

picture of 3-Methylisoxazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C8 N7 119.458 C1 C8 C9 128.968
H2 C1 H3 108.623 H2 C1 H4 108.319
H2 C1 C8 110.714 H3 C1 H4 108.623
H3 C1 C8 109.787 H4 C1 C8 110.714
C5 O6 N7 107.955 C5 C9 C8 105.931
C5 C9 H10 127.241 O6 C5 C9 109.462
O6 C5 H11 115.114 O6 N7 C8 105.079
N7 C8 C9 111.575 C8 C9 H10 126.828
C9 C5 H11 135.425
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability