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	hartrees
Energy at 0K	-2554.360387
Energy at 298.15K	-2554.362718
HF Energy	-2553.596899
Nuclear repulsion energy	308.185129

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	A₁	3241	3120
2	A₁	3206	3086
3	A₁	1451	1397
4	A₁	1357	1306
5	A₁	1078	1038
6	A₁	1021	983
7	A₁	762	733
8	A₁	455	438
9	A₂	858	826
10	A₂	660	635
11	A₂	519	500
12	B₁	849	817
13	B₁	693	667
14	B₁	386	372
15	B₂	3238	3117
16	B₂	3192	3072
17	B₂	1531	1473
18	B₂	1250	1204
19	B₂	1077	1037
20	B₂	818	787
21	B₂	628	604

Atom	y (Å)	z (Å)
Se1	0.000	0.920
C2	1.299	-0.440
C3	-1.299	-0.440
C4	0.724	-1.698
C5	-0.724	-1.698
H6	2.365	-0.199
H7	-2.365	-0.199
H8	1.321	-2.617
H9	-1.321	-2.617

	Se1	C2	C3	C4	C5	H6	H7	H8	H9
Se1		1.8808	1.8808	2.7171	2.7171	2.6163	2.6163	3.7760	3.7760
C2	1.8808		2.5970	1.3832	2.3819	1.0929	3.6709	2.1770	3.4059
C3	1.8808	2.5970		2.3819	1.3832	3.6709	1.0929	3.4059	2.1770
C4	2.7171	1.3832	2.3819		1.4479	2.2223	3.4330	1.0955	2.2417
C5	2.7171	2.3819	1.3832	1.4479		3.4330	2.2223	2.2417	1.0955
H6	2.6163	1.0929	3.6709	2.2223	3.4330		4.7290	2.6333	4.4077
H7	2.6163	3.6709	1.0929	3.4330	2.2223	4.7290		4.4077	2.6333
H8	3.7760	2.1770	3.4059	1.0955	2.2417	2.6333	4.4077		2.6418
H9	3.7760	3.4059	2.1770	2.2417	1.0955	4.4077	2.6333	2.6418

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
Se1	C2	C4	111.795	Se1	C2	H6	120.935
Se1	C3	C5	111.795	Se1	C3	H7	120.935
C2	Se1	C3	87.324	C2	C4	C5	114.543
C2	C4	H8	122.437	C3	C5	C4	114.543
C3	C5	H9	122.437	C4	C2	H6	127.271
C4	C5	H9	123.019	C5	C3	H7	127.271
C5	C4	H8	123.019

All results from a given calculation for C₄H₄Se (selenophene)

using model chemistry: CCSD(T)/aug-cc-pVDZ

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 C4H4Se (selenophene)

using model chemistry: CCSD(T)/aug-cc-pVDZ

States and conformations

All results from a given calculation for C₄H₄Se (selenophene)