Thiazyl halides NSX

Monomeric thiazyl halides NSX (X = F, Cl Br) have been characterized in the gas phase, but oligomerization to cyclic species, e.g., (NSX)3 (X = F, Cl) and (NSF)4, occurs in the condensed phase (Section 8.7). These ligands can be stabilized, however, by coordination to a transition metal. The NSF complexes are conveniently prepared in SO2 (Eq. 1.6) The monomeric fluoride NSF is conveniently generated in situ by thermal decomposition of FC(0)NSF2 or Hg(NSp2)2 (Section 8.2). 

H. G. Heal, The Inorgantc Heterocydtc Chemistry of Sulfur, Nitrogen and Phosphorus, Academic Press, London, 1980. This book has chapters on the cyclic oligomers formed by thiazyl halides, NSX sulfanuric halides, [NS(0)X] and thionyl imide, HNSO. 

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