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

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-284.687223
Energy at 298.15K-284.693706
HF Energy-283.657253
Nuclear repulsion energy223.646108
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 MP2/6-31G(2df,p)
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 3341 3156 0.41      
2 A 3316 3132 0.47      
3 A 3221 3042 2.03      
4 A 3195 3018 5.91      
5 A 3111 2939 10.20      
6 A 1595 1507 18.91      
7 A 1521 1437 12.38      
8 A 1510 1426 7.00      
9 A 1504 1421 14.36      
10 A 1436 1356 12.78      
11 A 1419 1341 2.90      
12 A 1301 1228 0.14      
13 A 1194 1127 15.20      
14 A 1087 1027 9.85      
15 A 1074 1014 2.04      
16 A 1034 977 4.35      
17 A 1001 945 12.77      
18 A 986 931 1.27      
19 A 920 869 9.68      
20 A 852 804 0.12      
21 A 799 754 40.52      
22 A 666 629 4.43      
23 A 664 628 0.06      
24 A 630 595 2.54      
25 A 330 312 5.90      
26 A 274 259 4.59      
27 A 126 119 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 19053.9 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 17996.4 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 MP2/6-31G(2df,p)
ABC
0.30647 0.11793 0.08653

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.127 0.018 0.000
H2 2.524 0.524 0.882
H3 2.480 -1.012 0.000
H4 2.524 0.524 -0.881
C5 -1.482 0.574 0.000
O6 -1.371 -0.765 0.000
N7 -0.037 -1.105 -0.000
C8 0.636 0.039 0.000
C9 -0.248 1.147 -0.000
H10 -0.008 2.196 -0.000
H11 -2.491 0.954 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 C9 H10 H11
C11.09121.08931.09123.65213.58472.43881.49152.62973.04994.7117
H21.09121.77211.76314.10294.19663.16152.13982.97503.15995.1099
H31.08931.77211.77214.26783.85832.51882.12253.47904.06005.3452
H41.09121.76311.77214.10294.19673.16132.13982.97493.15985.1100
C53.65214.10294.26784.10291.34392.21522.18471.36122.19261.0776
O63.58474.19663.85834.19671.34391.37592.16192.21793.26042.0521
N72.43883.16152.51883.16132.21521.37591.32762.26223.30173.2030
C81.49152.13982.12252.13982.18472.16191.32761.41742.25133.2577
C92.62972.97503.47902.97491.36122.21792.26221.41741.07632.2511
H103.04993.15994.06003.15982.19263.26043.30172.25131.07632.7763
H114.71175.10995.34525.11001.07762.05213.20303.25772.25112.7763

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 119.677 C1 C8 C9 129.367
H2 C1 H3 108.720 H2 C1 H4 107.772
H2 C1 C8 110.944 H3 C1 H4 108.719
H3 C1 C8 109.674 H4 C1 C8 110.942
C5 O6 N7 109.062 C5 C9 C8 103.658
C5 C9 H10 127.804 O6 C5 C9 110.146
O6 C5 H11 115.436 O6 N7 C8 106.178
N7 C8 C9 110.956 C8 C9 H10 128.538
C9 C5 H11 134.419
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability