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Journal of Structural Chemistry

2013 year, number 2

CRYSTAL STRUCTURE OF TWO POLYMORPHIC MODIFICATIONS OF NbS2Br2 NIOBIUM THIOBROMIDE

M. N. Sokolov1,2, A. V. Rogachev1, A. V. Virovets1, S. S. Yarovoi1, Yu. V. Mironov1, V. P. Fedin1,2
1A. V. Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk
caesar@niic.nsc.ru
2Novosibirsk State University
Keywords: niobium, sulfur, bromine, polymorphism, crystal structure

Abstract

The crystal structures of triclinic and monoclinic modifications of Nb thiobromide NbS2Br2 are determined by X-ray analysis. Both modifications possess layered structures in which {Nb2(µ-S2)2}4+ cluster units are connected by bridging bromides into 2D layers 2[Nb2(S2)2Br8/2]. The two polymorphs differ only in the way in which the layers are stacked. Interatomic distances and bond angles are identical for both polymorphs.