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

using model chemistry: MP2/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-52.268094
Energy at 298.15K-52.277781
Nuclear repulsion energy129.548846
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/CEP-121G*
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 3218 3066 6.02      
2 A 3107 2961 56.13      
3 A 3093 2947 41.28      
4 A 3087 2941 9.98      
5 A 1706 1625 99.81      
6 A 1562 1488 1.39      
7 A 1537 1464 0.21      
8 A 1518 1446 11.72      
9 A 1448 1379 34.30      
10 A 1392 1326 12.64      
11 A 1355 1291 13.42      
12 A 1258 1199 111.32      
13 A 1095 1043 0.95      
14 A 1028 980 85.65      
15 A 988 941 3.48      
16 A 961 916 33.35      
17 A 904 861 25.51      
18 A 744 709 6.00      
19 A 655 624 3.20      
20 A 346 329 5.96      
21 A 3178 3028 42.69      
22 A 3176 3026 12.31      
23 A 3146 2998 5.64      
24 A 1510 1439 10.66      
25 A 1248 1189 0.27      
26 A 1220 1163 1.60      
27 A 1131 1077 0.04      
28 A 1070 1019 0.70      
29 A 833 793 0.41      
30 A 569 542 3.64      
31 A 237 225 11.81      
32 A 137 131 1.22      

Unscaled Zero Point Vibrational Energy (zpe) 24226.3 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 23082.8 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/CEP-121G*
ABC
0.25316 0.11276 0.08162

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.169 0.007 0.015
C2 -1.397 -0.775 0.102
C3 -1.442 0.761 -0.075
N4 -0.027 1.195 0.063
O5 0.012 -1.102 -0.107
C6 0.672 0.113 0.002
H7 -1.664 -1.086 1.119
H8 -1.982 -1.338 -0.629
H9 -2.063 1.255 0.678
H10 -1.802 1.054 -1.069
H11 2.492 -0.603 0.864
H12 2.510 -0.481 -0.903
H13 2.596 1.008 0.087

Atom - Atom Distances (Å)
  C1 C2 C3 N4 O5 C6 H7 H8 H9 H10 H11 H12 H13
C13.65143.68972.49692.42771.50064.13584.41034.46104.24721.09411.09441.0904
C23.65141.54732.39991.46172.25341.09631.09222.21262.21003.96674.04454.3734
C33.68971.54731.48622.36362.21252.21102.23671.09381.09724.26884.22434.0493
N42.49692.39991.48622.30321.28983.00003.27302.12752.10973.19743.19022.6305
O52.42771.46172.36362.30321.38602.07712.07503.23662.97762.70922.69333.3413
C61.50062.25342.21251.28981.38602.85333.08933.03962.85562.13752.13302.1243
H74.13581.09632.21103.00002.07712.85331.79412.41523.06434.19234.67704.8584
H84.41031.09222.23673.27302.07503.08931.79412.90422.43874.77344.58075.1937
H94.46102.21261.09382.12753.23663.03962.41522.90421.77834.92305.14014.7032
H104.24722.21001.09722.10972.97762.85563.06432.43871.77834.99254.58004.5482
H111.09413.96674.26883.19742.70922.13754.19234.77344.92304.99251.77051.7915
H121.09444.04454.22433.19022.69332.13304.67704.58075.14014.58001.77051.7899
H131.09044.37344.04932.63053.34132.12434.85845.19374.70324.54821.79151.7899

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 126.805 C1 C6 O5 114.434
C2 C3 N4 104.559 C2 C3 H9 112.674
C2 C3 H10 112.255 C2 O5 C6 104.581
C3 C2 O5 103.499 C3 C2 H7 112.394
C3 C2 H8 114.758 C3 N4 C6 105.466
N4 C3 H9 110.168 N4 C3 H10 108.562
N4 C6 O5 118.753 O5 C2 H7 107.731
O5 C2 H8 107.798 C6 C1 H11 109.939
C6 C1 H12 109.568 C6 C1 H13 109.119
H7 C2 H8 110.126 H9 C3 H10 108.508
H11 C1 H12 107.999 H11 C1 H13 110.184
H12 C1 H13 110.018
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability