Elemental silicon and solid SiO give the same products as SiO2 upon reaction with alkali-metal glycolates

Treatment of Si, SiO and SiO2 with lithium or sodium ethylene glycolate gave five-co-ordinate silicon ethylene glycolate derivatives in quantitative yield: Li[Si(OCH2CH2O)2OCH2CH2OH] in the reactions with lithium glycolate and dimeric Na2[Si2(OCH2CH2O)5] with sodium glycolate; reaction of the latter compound with hot methanol resulted in an exchange of the monodentate glycolate group and the formation of Na[Si(OCH2CH2O)2OMe].