Abstract
A convenient preparation of Hg[C 6H 4(CH 2OH)-2]Cl ( 1) involves treatment of dilithiated benzyl alcohol with HgCl 2. 1 is smoothly oxidised to Hg[C 6H 4(CHO)-2]Cl ( 2) by reaction with pyridinium chlorochromate (PCC). The crystal structure of 2 reveals a two coordinate linear arrangement at mercury supplemented by weaker interactions with the aldehyde oxygen atoms both intramolecularly and intermolecularly. Treatment of 2 with NaI effects symmetrisation with the formation of Hg[C 6H 4(CHO)-2] 2 ( 3). Reaction between 3 and the Wittig reagent Ph 3PCH 2 results in the formation of Hg[C 6H 4(CHCH 2)-2] 2 ( 4). The crystal structure of 4 has been determined.
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