National Institute of Standards and Technology

Computational Chemistry Comparison and Benchmark DataBase
Release 22	May 2022
NIST Standard Reference Database 101

I	Introduction
II	Experimental data
III	Calculated data
IV	Data comparisons
V	Cost comparisons
VI	Input and output files
VII	Tutorials and Units
VIII	Links to other sites
IX	Feedback
X	Older CCCBDB versions
XII	Geometries
XIII	Vibrations
XIV	Reaction data
XV	Entropy data
XVI	Bibliographic data
XVII	Ion data
XVIII	Bad calculations
XIX	Index of properties
XX	H-bond dimers
XXI	Oddities

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The National Institute of Standards and Technology (NIST) is an agency of the U.S. Department of Commerce.

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II.B.3. (XII.A.3.)

List of experimental bond lengths for bond type rCSe

Bond lengths in Å.
Click on an entry for more experimental geometry data.

bond type	Species	Name	Length	Comment
rC=Se	CSe	Carbon monoselenide	1.676	re
rC=Se	CSe2	Carbon diselenide	1.692	re
rC=Se	SCSe	Carbon sulfide selenide	1.695	rs
rC=Se	OCSe	Carbonyl selenide	1.709	r0
rC=Se	H2CSe	Selenoformaldehyde	1.753	rs
rCSe	C4H4Se	selenophene	1.855
rCSe	CH3SeCH3	dimethylselenide	1.943
rCSe	CH3SeH	Methane selenol	1.959
Average			1.785	±0.117
Min			1.676
Max			1.959