return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H7NO (Oxazole, 4,5-dihydro-2-methyl-)

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-285.753898
Energy at 298.15K-285.762875
HF Energy-284.859242
Nuclear repulsion energy240.717798
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**
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 3274 3066 3.88      
2 A 3233 3027 6.35      
3 A 3223 3019 35.51      
4 A 3198 2994 9.93      
5 A 3148 2948 41.52      
6 A 3145 2946 6.36      
7 A 3140 2941 34.04      
8 A 1755 1644 90.64      
9 A 1582 1482 0.47      
10 A 1557 1458 0.14      
11 A 1539 1442 7.94      
12 A 1535 1437 7.56      
13 A 1465 1372 33.59      
14 A 1411 1321 13.83      
15 A 1371 1284 15.72      
16 A 1285 1203 72.49      
17 A 1277 1196 29.44      
18 A 1240 1161 2.38      
19 A 1145 1072 0.12      
20 A 1108 1037 1.15      
21 A 1090 1021 2.43      
22 A 1043 977 78.63      
23 A 1003 940 2.25      
24 A 977 915 27.97      
25 A 923 864 20.31      
26 A 869 813 3.98      
27 A 738 691 4.55      
28 A 670 627 3.53      
29 A 587 550 5.79      
30 A 351 328 5.40      
31 A 241 226 10.04      
32 A 147 138 1.11      
33 A 78 73 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 24672.0 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 23105.3 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**
ABC
0.25727 0.11456 0.08310

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.153 0.006 0.010
C2 -1.392 -0.774 0.063
C3 -1.430 0.763 -0.047
N4 -0.022 1.188 0.041
O5 0.016 -1.096 -0.067
C6 0.669 0.111 0.001
H7 -1.733 -1.136 1.034
H8 -1.933 -1.291 -0.726
H9 -2.011 1.223 0.751
H10 -1.843 1.100 -0.999
H11 2.480 -0.577 0.868
H12 2.492 -0.504 -0.890
H13 2.583 1.002 0.053

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 C6 H7 H8 H9 H10 H11 H12 H13
C13.62983.66192.47542.40611.48754.17794.34924.40074.26391.08871.08881.0851
C23.62981.54062.39271.44992.24331.09041.08782.20032.20083.95984.00834.3534
C33.66191.54061.47312.35492.19812.20572.22041.08931.09134.23344.20664.0213
N42.47542.39271.47312.28731.28063.05223.22232.11232.09873.17243.17032.6120
O52.40611.44992.35492.28731.37422.06672.06603.18673.02472.68682.67593.3178
C61.48752.24332.19811.28061.37422.89683.04322.99692.87912.12302.12032.1120
H74.17791.09042.20573.05222.06672.89681.77762.39193.02404.25374.68544.9156
H84.34921.08782.22043.22232.06603.04321.77762.91632.40814.74624.49715.1239
H94.40072.20031.08932.11233.18672.99692.39192.91631.76224.84015.09444.6523
H104.26392.20081.09132.09873.02472.87913.02402.40811.76224.99934.62384.5507
H111.08873.95984.23343.17242.68682.12304.25374.74624.84014.99931.76001.7800
H121.08884.00834.20663.17032.67592.12034.68544.49715.09444.62381.76001.7789
H131.08514.35344.02132.61203.31782.11204.91565.12394.65234.55071.78001.7789

picture of Oxazole, 4,5-dihydro-2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C6 N4 126.660 C1 C6 O5 114.387
C2 C3 N4 105.083 C2 C3 H9 112.441
C2 C3 H10 112.353 C2 O5 C6 105.156
C3 C2 O5 103.853 C3 C2 H7 112.811
C3 C2 H8 114.186 C3 N4 C6 105.708
N4 C3 H9 110.143 N4 C3 H10 108.940
N4 C6 O5 118.952 O5 C2 H7 108.057
O5 C2 H8 108.154 C6 C1 H11 110.024
C6 C1 H12 109.803 C6 C1 H13 109.368
H7 C2 H8 109.383 H9 C3 H10 107.831
H11 C1 H12 107.857 H11 C1 H13 109.943
H12 C1 H13 109.829
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability