Synthesis and Structure of [<i>trans</i>-{1,2-Bis(κ²-<i>O</i>,<i>O</i>-<i>N</i>- phenylcarbamoyl)cyclopentadienylbis(thf)}magnesium]·4thf

The reaction of magnesocene, Cp₂Mg, with phenylisocyanate (1:4 equivalents) in thf solvent affords [<i>trans</i>-{1,2-bis(<i>N</i>-phenylcarbamoyl)cyclopentadienylbis(thf)}magnesium]·4thf (<b>1</b>·4thf), the structure of which has been determined by single-crystal X-ray diffraction. The structure of <b>1</b>·4thf provides evidence for a metal tethering effect in the 1,2-selective formation of other bis-carbamoyl ligands similar to that reported in this work.