Abstract

Triphenyltin chloride reacts with equimolar amounts of tetramethylammonium chloride and of silver oxalate to yield tetramethylammonium bisoxalatotris(triphenylstannate). A crystal structural study has shown the trinuclear stannate to be composed of helical [Ph 3Snox · (Ph 3Sn) 2ox] n n− chains that run parallel to the b-axis; the cations fill up the space between the chains. The structure is an unusual example of a triorganotin compound having within the same molecule five-coordinate tin sites in distinct cis- and trans-trigonal bipyramidal geometries.

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