Trimethylsilylation of Ag10Si4O13: cyclisation of the linear chain anion Si4O13 10?

Abstract
Trimethylsilylation of Ag10Si4O13 by a modified ‘direct method’ yielded the trimethylsilyl (TMS) derivative of the linear chain ion Si4O13 10– as the major product; this ion readily undergoes cyclisation in acidic aqueous media to yield the cyclic tetramer Si4O12 8– and the presence of linear and branched chain isomers of the TMS derivative of Si4O13 10– was confirmed in the tri-methylsilylation of lead fluorosilicate glass.

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