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	hartrees
Energy at 0K	-302.378817
Energy at 298.15K	-302.383583
HF Energy	-301.771424
Nuclear repulsion energy	212.120543

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A	3299	3138	0.65
2	A	3208	3051	0.52
3	A	3205	3049	0.24
4	A	3140	2987	0.74
5	A	1883	1791	122.28
6	A	1735	1650	244.89
7	A	1536	1461	11.56
8	A	1503	1430	4.44
9	A	1273	1211	17.37
10	A	1220	1161	36.05
11	A	1178	1121	0.13
12	A	998	950	6.73
13	A	959	912	74.16
14	A	918	874	27.39
15	A	886	843	73.97
16	A	841	800	123.94
17	A	744	708	114.70
18	A	741	705	0.57
19	A	657	625	0.84
20	A	518	493	2.35
21	A	517	492	2.27
22	A	448	426	4.75
23	A	312	297	0.85
24	A	132	126	0.16

Atom	x (Å)	y (Å)	z (Å)
C1	-2.304	-0.138	-0.000
H2	-2.743	-1.129	-0.001
H3	-2.967	0.719	-0.001
O4	0.040	-1.029	0.001
C5	1.089	0.012	-0.000
O6	2.288	-0.159	-0.000
C7	0.031	1.163	0.000
H8	0.055	1.778	-0.902
H9	0.055	1.778	0.903
C10	-0.987	0.023	-0.000

	C1	H2	H3	O4	C5	O6	C7	H8	H9	C10
C1		1.0834	1.0835	2.5073	3.3957	4.5918	2.6732	3.1702	3.1703	1.3265
H2	1.0834		1.8608	2.7849	3.9979	5.1238	3.5984	4.1343	4.1343	2.1001
H3	1.0835	1.8608		3.4778	4.1165	5.3275	3.0308	3.3265	3.3269	2.0982
O4	2.5073	2.7849	3.4778		1.4775	2.4107	2.1920	2.9491	2.9483	1.4705
C5	3.3957	3.9979	4.1165	1.4775		1.2114	1.5630	2.2366	2.2367	2.0758
O6	4.5918	5.1238	5.3275	2.4107	1.2114		2.6151	3.0904	3.0906	3.2802
C7	2.6732	3.5984	3.0308	2.1920	1.5630	2.6151		1.0923	1.0923	1.5284
H8	3.1702	4.1343	3.3265	2.9491	2.2366	3.0904	1.0923		1.8044	2.2315
H9	3.1703	4.1343	3.3269	2.9483	2.2367	3.0906	1.0923	1.8044		2.2315
C10	1.3265	2.1001	2.0982	1.4705	2.0758	3.2802	1.5284	2.2315	2.2315

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C10	O4	127.307	C1	C10	C7	138.783
H2	C1	H3	118.350	H2	C1	C10	120.923
H3	C1	C10	120.727	O4	C5	O6	127.134
O4	C5	C7	92.216	O4	C10	C7	93.910
C5	O4	C10	89.520	C5	C7	H8	113.589
C5	C7	H9	113.594	C5	C7	C10	84.354
O6	C5	C7	140.650	H8	C7	H9	111.375
H8	C7	C10	115.750	H9	C7	C10	115.749

All results from a given calculation for C₄H₄O₂ (2-Oxetanone, 4-methylene-)

using model chemistry: MP2/3-21G*

States and conformations

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for C4H4O2 (2-Oxetanone, 4-methylene-)

using model chemistry: MP2/3-21G*

States and conformations

All results from a given calculation for C₄H₄O₂ (2-Oxetanone, 4-methylene-)