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: MP3=FULL/6-31+G**

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=FULL/6-31+G**
 hartrees
Energy at 0K-285.829773
Energy at 298.15K 
HF Energy-284.867474
Nuclear repulsion energy241.159547
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=FULL/6-31+G**
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' 3268 3044 5.16      
2 A' 3166 2950 48.56      
3 A' 3153 2937 33.80      
4 A' 3147 2932 8.55      
5 A' 1817 1693 140.49      
6 A' 1591 1482 1.28      
7 A' 1564 1457 0.05      
8 A' 1539 1434 7.87      
9 A' 1479 1377 42.67      
10 A' 1427 1329 15.08      
11 A' 1391 1296 13.11      
12 A' 1303 1214 112.81      
13 A' 1125 1048 3.73      
14 A' 1076 1002 81.24      
15 A' 1021 951 1.02      
16 A' 982 915 28.51      
17 A' 939 875 25.92      
18 A' 776 723 5.52      
19 A' 676 629 3.10      
20 A' 356 332 6.38      
21 A" 3225 3004 5.74      
22 A" 3224 3003 39.27      
23 A" 3194 2976 4.21      
24 A" 1529 1424 8.65      
25 A" 1281 1193 0.12      
26 A" 1247 1162 3.62      
27 A" 1154 1075 0.12      
28 A" 1093 1018 1.16      
29 A" 856 798 0.83      
30 A" 597 556 5.52      
31 A" 243 226 11.81      
32 A" 140 130 0.73      
33 A" 67i 63i 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 24754.2 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 23061.0 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=FULL/6-31+G**
ABC
0.25926 0.11434 0.08302

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.341 2.129 0.000
C2 0.546 -1.500 0.000
C3 -0.990 -1.288 0.000
N4 -1.166 0.171 0.000
O5 1.076 -0.162 0.000
C6 0.000 0.678 0.000
H7 0.909 -2.016 0.886
H8 0.909 -2.016 -0.886
H9 -1.469 -1.717 0.878
H10 -1.469 -1.717 -0.878
H11 0.934 2.369 0.880
H12 0.934 2.369 -0.880
H13 -0.573 2.712 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 C6 H7 H8 H9 H10 H11 H12 H13
C13.63433.66652.47072.40541.48994.27614.27614.34024.34021.08801.08801.0838
C23.63431.55042.39181.43982.24541.08761.08762.20862.20863.98643.98644.3578
C33.66651.55041.46902.35362.20132.21892.21891.08861.08864.22474.22474.0215
N42.47072.39181.46902.26701.27183.14233.14232.10412.10413.16493.16492.6097
O52.40541.43982.35362.26701.36522.06182.06183.10993.10992.68262.68263.3130
C61.48992.24542.20131.27181.36522.97822.97822.94412.94412.12242.12242.1129
H74.27611.08762.21893.14232.06182.97821.77112.39752.97634.38484.72685.0333
H84.27611.08762.21893.14232.06182.97821.77112.97632.39754.72684.38485.0333
H94.34022.20861.08862.10413.10992.94412.39752.97631.75624.74055.05594.6036
H104.34022.20861.08862.10413.10992.94412.97632.39751.75625.05594.74054.6036
H111.08803.98644.22473.16492.68262.12244.38484.72684.74055.05591.75951.7783
H121.08803.98644.22473.16492.68262.12244.72684.38485.05594.74051.75951.7783
H131.08384.35784.02152.60973.31302.11295.03335.03334.60364.60361.77831.7783

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 126.740 C1 C6 O5 114.740
C2 C3 N4 104.740 C2 C3 H9 112.455
C2 C3 H10 112.455 C2 O5 C6 106.328
C3 C2 O5 103.768 C3 C2 H7 113.354
C3 C2 H8 113.354 C3 N4 C6 106.643
N4 C3 H9 109.813 N4 C3 H10 109.813
N4 C6 O5 118.521 O5 C2 H7 108.523
O5 C2 H8 108.523 C6 C1 H11 109.853
C6 C1 H12 109.853 C6 C1 H13 109.346
H7 C2 H8 109.015 H9 C3 H10 107.544
H11 C1 H12 107.910 H11 C1 H13 109.931
H12 C1 H13 109.931
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability