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	hartrees
Energy at 0K	-341.932067
Energy at 298.15K	-341.938541
HF Energy	-340.657063
Nuclear repulsion energy	247.942596

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A	3153	2989	23.21
2	A	3079	2920	24.58
3	A	1986	1883	622.24
4	A	1577	1495	3.29
5	A	1442	1367	6.20
6	A	1296	1229	18.43
7	A	1261	1196	192.12
8	A	1183	1122	29.44
9	A	986	935	5.94
10	A	857	813	43.84
11	A	743	704	0.98
12	A	134	127	0.48
13	B	3160	2996	20.51
14	B	3087	2927	45.48
15	B	1568	1486	5.87
16	B	1442	1367	13.90
17	B	1310	1242	6.27
18	B	1226	1162	7.73
19	B	1092	1035	276.80
20	B	923	875	4.99
21	B	806	764	25.07
22	B	699	662	0.70
23	B	528	501	0.03
24	B	145	137	1.45

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.854
O2	0.000	0.000	2.029
O3	0.000	1.123	0.047
O4	0.000	-1.123	0.047
C5	0.199	0.736	-1.266
C6	-0.199	-0.736	-1.266
H7	-0.417	1.338	-1.922
H8	1.245	0.866	-1.536
H9	0.417	-1.338	-1.922
H10	-1.245	-0.866	-1.536

	C1	O2	O3	O4	C5	C6	H7	H8	H9	H10
C1		1.1750	1.3835	1.3835	2.2536	2.2536	3.1100	2.8307	3.1100	2.8307
O2	1.1750		2.2787	2.2787	3.3827	3.3827	4.1925	3.8743	4.1925	3.8743
O3	1.3835	2.2787		2.2467	1.3835	2.2849	2.0238	2.0300	3.1793	2.8305
O4	1.3835	2.2787	2.2467		2.2849	1.3835	3.1793	2.8305	2.0238	2.0300
C5	2.2536	3.3827	1.3835	2.2849		1.5246	1.0825	1.0878	2.1859	2.1734
C6	2.2536	3.3827	2.2849	1.3835	1.5246		2.1859	2.1734	1.0825	1.0878
H7	3.1100	4.1925	2.0238	3.1793	1.0825	2.1859		1.7700	2.8029	2.3860
H8	2.8307	3.8743	2.0300	2.8305	1.0878	2.1734	1.7700		2.3860	3.0330
H9	3.1100	4.1925	3.1793	2.0238	2.1859	1.0825	2.8029	2.3860		1.7700
H10	2.8307	3.8743	2.8305	2.0300	2.1734	1.0878	2.3860	3.0330	1.7700

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	C5	109.064	C1	O4	C6	109.064
O2	C1	O3	125.713	O2	C1	O4	125.713
O3	C1	O4	108.574	O3	C5	C6	103.459
O3	C5	H7	109.702	O3	C5	H8	109.879
O4	C6	C5	103.459	O4	C6	H9	109.702
O4	C6	H10	109.879	C5	C6	H9	112.855
C5	C6	H10	111.507	C6	C5	H7	112.855
C6	C5	H8	111.507	H7	C5	H8	109.291
H9	C6	H10	109.291

All results from a given calculation for C₂H₄CO₃ (Ethylene carbonate)

using model chemistry: CCSD=FULL/cc-pVTZ

States and conformations

Conformer 1 (C2V)

Conformer 2 (C2)

	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 C2H4CO3 (Ethylene carbonate)

using model chemistry: CCSD=FULL/cc-pVTZ

States and conformations

Conformer 1 (C2V)

Conformer 2 (C2)

All results from a given calculation for C₂H₄CO₃ (Ethylene carbonate)