Group 2 Element Compounds Be, Mg, Ca, Sr, Ba

It is well-known that Grignard reagents such as RMgBr react with COS to form thiocarboxylic acid magnesium salts RCOSMgBr 11 [328]. Very little is known about the coordination properties of magnesium thiocarboxylates. Reactions 

Sr(CH3C00)(CH3C0S) 4H20 Ba(CH3COO)(CH3COS) 3H20 13 14 

Through a similar ligand-exchange reaction between Sr(CH3COO)2 and thioacetic acid, the acetato/thioacetato Sr complex 13 is obtained [16]. In the presence of 15-crown-5 ether, the reaction of SrC03 with thioacetic acid yields a polyether Sr complex with both acetato and thioacetato ligands [194]. 

These alkali earth metal complexes 12-14 are thermally stable and decompose above 300 °C to the corresponding metal acetate and carbonate MCO3 and the sulfides MS (M=Ca, Sr, Ba) [18]. 

---