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	hartrees
Energy at 0K	-56.072327
Energy at 298.15K	-56.076868
HF Energy	-55.468813
Nuclear repulsion energy	109.634811

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A	3240	3163	4.00
2	A	3127	3052	4.58
3	A	3124	3049	0.35
4	A	3045	2971	5.18
5	A	1773	1730	88.21
6	A	1662	1623	388.55
7	A	1483	1447	13.60
8	A	1444	1409	4.48
9	A	1268	1238	8.05
10	A	1200	1171	50.57
11	A	1107	1080	1.19
12	A	993	969	0.60
13	A	964	941	75.44
14	A	904	882	95.96
15	A	846	826	68.15
16	A	727	710	187.64
17	A	713	696	0.49
18	A	702	686	82.01
19	A	631	615	1.27
20	A	489	477	4.28
21	A	475	463	4.43
22	A	386	376	0.84
23	A	294	287	1.01
24	A	118	115	0.32

Atom	x (Å)	y (Å)	z (Å)
C1	-2.333	-0.143	-0.001
H2	-2.763	-1.144	-0.001
H3	-2.999	0.721	-0.001
O4	0.039	-1.042	0.001
C5	1.105	-0.004	-0.000
O6	2.329	-0.183	-0.001
C7	0.058	1.164	0.000
H8	0.099	1.788	-0.903
H9	0.098	1.787	0.905
C10	-0.991	0.034	-0.000

	C1	H2	H3	O4	C5	O6	C7	H8	H9	C10
C1		1.0900	1.0908	2.5363	3.4406	4.6616	2.7249	3.2336	3.2337	1.3534
H2	1.0900		1.8798	2.8041	4.0330	5.1820	3.6456	4.1960	4.1960	2.1286
H3	1.0908	1.8798		3.5122	4.1674	5.4037	3.0890	3.3983	3.3987	2.1219
O4	2.5363	2.8041	3.5122		1.4881	2.4457	2.2065	2.9722	2.9713	1.4899
C5	3.4406	4.0330	4.1674	1.4881		1.2367	1.5688	2.2455	2.2456	2.0964
O6	4.6616	5.1820	5.4037	2.4457	1.2367		2.6403	3.1106	3.1110	3.3268
C7	2.7249	3.6456	3.0890	2.2065	1.5688	2.6403		1.0991	1.0991	1.5417
H8	3.2336	4.1960	3.3983	2.9722	2.2455	3.1106	1.0991		1.8080	2.2537
H9	3.2337	4.1960	3.3987	2.9713	2.2456	3.1110	1.0991	1.8080		2.2537
C10	1.3534	2.1286	2.1219	1.4899	2.0964	3.3268	1.5417	2.2537	2.2537

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C10	O4	126.189	C1	C10	C7	140.416
H2	C1	H3	119.083	H2	C1	C10	120.811
H3	C1	C10	120.106	O4	C5	O6	127.443
O4	C5	C7	92.369	O4	C10	C7	93.395
C5	O4	C10	89.492	C5	C7	H8	113.463
C5	C7	H9	113.473	C5	C7	C10	84.744
O6	C5	C7	140.187	H8	C7	H9	110.668
H8	C7	C10	116.162	H9	C7	C10	116.159

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

using model chemistry: MP2/CEP-121G

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/CEP-121G

States and conformations

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