Universität zu Köln

Hetzert, Marc, Tobeck, Christian and Ruschewitz, Uwe ORCID: 0000-0002-6511-6894 (2020). NaSeC2H: A Crystalline Compound with Disordered -SeC2H Anions. Z. Anorg. Allg. Chem., 646 (18). S. 1583 - 1588. WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1521-3749

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Abstract

By reaction of NaC2H with elemental selenium (grey or red) in liquid ammonia a crystalline brownish powder of NaSeC2H was obtained. The existence of the new -SeC2H anion - recently discovered in A(I)SeC(2)H (A(I) = K, Rb, Cs) - was confirmed by IR spectra showing the expected C equivalent to C, C-H, and C-Se vibrations. A synchrotron powder diffraction pattern (SNBL, ESRF/Grenoble) was indexed in a cubic unit cell with a = 7.044 angstrom. Analysis of the data led to a pyrite-type structure (Pa3, Z = 4) with a static orientational disorder of the -SeC2H anions over two positions. No phase transition was observed upon cooling to 100 K, where essentially the same structure was obtained with a = 6.989 angstrom. Upon heating, NaSeC2H releases C2H2 as revealed by thermal analysis (DSC/TGA) resulting in potential Na2Se2C2 crystallizing in a small cubic unit cell with a approximate to 3.899 angstrom similar to findings on the decomposition of the other A(I)SeC(2)H compounds.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hetzert, Marc UNSPECIFIED UNSPECIFIED UNSPECIFIED Tobeck, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Ruschewitz, Uwe UNSPECIFIED orcid.org/0000-0002-6511-6894 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-334396
DOI:	10.1002/zaac.202000131
Journal or Publication Title:	Z. Anorg. Allg. Chem.
Volume:	646
Number:	18
Page Range:	S. 1583 - 1588
Date:	2020
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1521-3749
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PHASE-TRANSITION Multiple languages Chemistry, Inorganic & Nuclear Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/33439