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	hartrees
Energy at 0K	-304.697105
Energy at 298.15K	-304.701960
HF Energy	-303.608228
Nuclear repulsion energy	217.627244

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A	3322	3161	0.02
2	A	3216	3060	1.67
3	A	3207	3051	0.09
4	A	3137	2985	1.10
5	A	1936	1842	314.21
6	A	1762	1677	286.56
7	A	1456	1386	11.30
8	A	1430	1361	5.33
9	A	1272	1211	72.12
10	A	1212	1154	0.42
11	A	1129	1075	1.33
12	A	1024	974	165.41
13	A	998	950	2.27
14	A	985	937	1.23
15	A	910	866	156.76
16	A	845	804	56.99
17	A	824	784	46.51
18	A	742	706	0.35
19	A	673	640	0.02
20	A	531	506	2.62
21	A	515	490	4.99
22	A	456	433	4.14
23	A	317	302	0.79
24	A	127	121	0.67

Atom	x (Å)	y (Å)	z (Å)
C1	-2.260	-0.152	-0.000
H2	-2.677	-1.146	-0.000
H3	-2.919	0.699	0.000
O4	0.038	-0.973	-0.000
C5	1.047	-0.004	0.000
O6	2.222	-0.183	-0.000
C7	0.053	1.149	0.000
H8	0.090	1.767	-0.893
H9	0.090	1.767	0.893
C10	-0.951	0.034	0.000

	C1	H2	H3	O4	C5	O6	C7	H8	H9	C10
C1		1.0782	1.0773	2.4405	3.3100	4.4819	2.6539	3.1625	3.1625	1.3219
H2	1.0782		1.8616	2.7214	3.8956	4.9932	3.5673	4.1160	4.1160	2.0914
H3	1.0773	1.8616		3.3980	4.0281	5.2165	3.0062	3.3153	3.3153	2.0776
O4	2.4405	2.7214	3.3980		1.3988	2.3220	2.1227	2.8824	2.8824	1.4122
C5	3.3100	3.8956	4.0281	1.3988		1.1887	1.5224	2.2020	2.2020	1.9983
O6	4.4819	4.9932	5.2165	2.3220	1.1887		2.5457	3.0243	3.0243	3.1805
C7	2.6539	3.5673	3.0062	2.1227	1.5224	2.5457		1.0861	1.0861	1.5006
H8	3.1625	4.1160	3.3153	2.8824	2.2020	3.0243	1.0861		1.7854	2.2097
H9	3.1625	4.1160	3.3153	2.8824	2.2020	3.0243	1.0861	1.7854		2.2097
C10	1.3219	2.0914	2.0776	1.4122	1.9983	3.1805	1.5006	2.2097	2.2097

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C10	O4	126.377	C1	C10	C7	140.109
H2	C1	H3	119.462	H2	C1	C10	120.898
H3	C1	C10	119.639	O4	C5	O6	127.452
O4	C5	C7	93.114	O4	C10	C7	93.514
C5	O4	C10	90.617	C5	C7	H8	114.117
C5	C7	H9	114.116	C5	C7	C10	82.755
O6	C5	C7	139.434	H8	C7	H9	110.553
H8	C7	C10	116.439	H9	C7	C10	116.438

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

using model chemistry: MP2/Def2TZVPP

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/Def2TZVPP

States and conformations

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