Notes. Insertion of nitrogen oxide into a zirconium–carbon bond: reaction of dialkylbis(cyclopentadienyl)zirconium(IV) complexes with nitrogen oxide

Abstract

Nitrogen oxide inserts twice into one of the Zr–C σ bonds present in [Zr(cp)₂R₂](cp =η⁵-C₅H₅, R = Me or CH₂Ph), forming an N-alkyl-N-nitrosohydroxylaminato anion which acts as a bidentate ligand. The structure of [Zr(cp)₂(CH₂Ph)(O₂N₂CH₂Ph)] was elucidated by an X-ray diffraction analysis, showing the structural features of the ZrO₂N₂ metallacycle. [Zr(cp)₂(CH₂Ph)(O₂N₂CH₂Ph)] crystallizes in the trigonal space group R, with a=b=c= 18.771(6)Å, α=β=γ= 116.37(3)°,Z= 6, and R= 0.038.