In Situ 119Sn Conversion Electron Mössbauer Study of the Surface of Tin Layers as Deposited by an Electroless Process

In situ119Sn conversion electron Mössbauer spectroscopy has been used to investigate the process of autocatalytic (electroless) tin deposition in a strong alkaline solution using a rotating disk. It is very likely that a tin(II) compound—probably some tin(II) hydroxide complex—is present at the surface during the Sn‐metal depositing disproportionation reaction. The results obtained in a tin(II) solution with a pH of 6.1 indicate the presence at the surface of what is probably a tin(II) chloride compound.