Aparna Kasani

PH2P(NSIME3)2CLI2 : A DILITHIUM DIANIONIC METHANIDE SALT WITH AN UNUSUAL LI4C2 CLUSTER STRUCTURE

Four lithium atoms in a square-planar arrangement are capped by two carbon atoms and encapsulated by NSiMe3 chelation in the dilithium methanide salt 1. This air- and moisture-sensitive complex is formed by the reaction of CH2 (Ph2 P=NSiMe3 )2 with alkyl- or aryllithium reagents.

[Ph2P(NSiMe3)]2CLi2: ein dianionisches Dilithiummethanidsalz mit einer ungewöhnlichen Li4C2-Clusterstruktur

Vier Lithiumatome in quadratisch-planarer Anordnung werden im Lithiummethanidsalz 1 von zwei Kohlenstoffatomen uberdacht und durch chelatbildende NSiMe3-Einheiten umschlossen. Dieser luft- und feuchtigkeitsempfindliche Komplex bildet sich bei der Reaktion von CH2(Ph2P = NSiMe3)2 mit Alkyl- oder Aryllithiumreagentien.

Chromium bis(phosphoranimine) complexes; bridging chromium carbenes with no CO or Cp supporting ligands†

Novel dimeric and tetrametallic Cr(II) bridging carbene complexes supported by bis(phosphinimine) ligands are described.

The reduction of Nb2Cl6(tmeda)2 by R2NLi. Formation of a diamagnetic niobium(II) cluster with short Nb–Nb triple bond and amide C–N bond cleavage

Reduction of trivalent Nb2Cl6(tmeda)2 with either lithium diisopropylamide or n-butyllithium yields a novel NbII cluster which performs oxidative addition into the amide C–N bond.