Molybdenum(VI) Complexes of Schiff Bases Derived from Salicylaldehyde and 2-Aminoethanethiol (Cysteamine)

Article abstract of DOI:10.1071/CH9842235

The reaction of salicylaldehyde and 2-aminoethanethiol (cysteamine) in methanol results in two distinct products: a yellow oil, 2-(2"-mercaptoethyliminomethyl)phenol, and a yellow crystalline solid, 2,2'-bisphenol, which is an oxidation product of the former.The latter compound may also be prepared from salicylaldehyde and 2,2'-dithio-bis(ethylamine)(cystamine)in methanol. 2-(2"-Mercaptoethyliminomethyl)phenol reacts with MoO2(acac)2 (acac=pentane-2,4-dionate) in methanol to yield a red crystalline solid with empirical formula MoO2(mep) .This red solid exists as a dimer in the solid state.It forms adducts with dimethyl sulfoxide, hexamethylphosphoric acid triamide and pyridine. 2,2'-bisphenol reacts with MoO2(acac)2 to yield a pale yellow solid.It is a monomeric compound whose formula is MoO2(dbp) bisphenolate>.It does not form an adduct and is decomposed by an excess of tetramethylammonium hydroxide in methanol.