Poly[di-μ₃-hydroxymethanesulfinato-zinc(II)]

Abstract

Zinc(II) formaldehyde sulfoxylate, [Zn(CH3O3S)2], a widely marketed additive in the polymer and textile industry (under the registered trademarks Decroline, Decolin and Safolin, CAS 24887‐06‐7), possesses, in the solid state, a polymeric framework, with the Zn atoms octa­hedrally coordinated by six O atoms of four different hydroxy­methane­sulfinate groups. The latter are found to coordinate through all their O atoms, including the hydr­oxy ones, and possess a chelating nature. By contrast, in the structure of the only other commercially available salt of this ligand (dihydrated sodium formaldehyde sulfoxylate), the organic residue, being involved in an extensive network of hydrogen‐bond contacts, is fully stretched and bridges two NaI ions through a single O atom.

Recent Developments in Rongalite Chemistry: A Critical Review

“…Besides, rongalite is used as an anti‐oxidant in the pharmaceutical formulation, material sciences, and also useful in commercial cosmetic hair‐dye colour removers. Noticeably, zinc complex of rongalite i. e., Zn(HOCH 2 SO 2 ) 2 is marketed under the trademarks decolin, decroline, or safolin, which is used in polymers/textiles as an additive [3] . Although, rongalite is commercially available with low‐cost, nonetheless it can be easily prepared from formaldehyde and sodium dithionite as shown in the scheme 1 [4,5]…”

“…Noticeably, zinc complex of rongalite i. e., Zn(HOCH 2 SO 2 ) 2 is marketed under the trademarks decolin, decroline, or safolin, which is used in polymers/textiles as an additive. [3] Although, rongalite is commercially available with low-cost, nonetheless it can be easily prepared from formaldehyde and sodium dithionite as shown in the scheme 1. [4,5] On the other hand, in recent years rongalite has played a momentous role in the synthetic organic chemistry for carrying out the diverse challenging transformations.…”