Insertion of CS2 into the group 2 metal-alkoxide bonds of [{M(OR)(2)}(n)] (M = Mg, Ca, Sr or Ba; R = Et or Pr-i); crystal structures of [Ca(S2COPri)(2)((PrOH)-O-i)(3)]center dot 2Pr(i)OH and [{Ba(S2COEt)(2)}(infinity)]

摘要

The insertion of carbon disulfide into the M-O bonds of the alkaline-earth-metal ethoxides and isopropoxides has been studied. The resulting products have been characterised by IR, H-1 and C-13 NMR spectroscopy, mass spectrometry and thermogravimetric analysis. Two of these complexes have been structurally characterised by single crystal X-ray crystallography and the data have confirmed the insertion of CS, into both Ba-O bonds of [{Ba(OEt)(2)(EtOH)(4)}(n)] giving the polymer [{Ba(S2COEt)(2)}(infinity)] and into both Ca-O bonds of [{Ca(OEt)(2)(EtOH)(4)}(n)] giving the monomer [Ca(S2COPri)(2)((PrOH)-O-i)(3)]. 2Pr(i)OH. [References: 20]