Since the discovery of covalently-bound mid-and late-transition metal carbenes there has
been a spectacular explosion of interest in their chemistry, but their early metal counterparts …

This review is dedicated to the chemistry of stable and isolable species that bear two lone
pairs at the same C center, ie, geminal dianions, stabilized by main group elements. Three …

Highly active yttrium phosphasalen initiators for the stereocontrolled ring-opening
polymerization of rac-lactide are reported. The initiators are coordinated by a new class of …

Preparation and characterization of three yttrium alkoxide complexes with new
phosphasalen ligands are reported. The phosphasalens are analogues of the well-known …

Rare earth carbenes exclusively exhibit Wittig-type reactivity with carbonyl compounds to
afford alkenes. Here, we report that yttrium carbenes can effect regioselective ortho-C− H …

Yttrium and aluminum complexes of an original pyridine-bis (phenolate) ligand have been
prepared. Reactions of {ONOMe, Cumyl} Y [N (SiHMe2) 2](THF)(Et2O)(1) with 1 equiv of …

Abstract Treatment of [K (BIPMMesH)](BIPMMes={C (PPh2NMes) 2} 2−; Mes= C6H2‐2, 4, 6‐
Me3) with [UCl4 (thf) 3](1 equiv) afforded [U (BIPMMesH)(Cl) 3 (thf)](1), which generated [U …

Using a geminal dianion as precursor, a nucleophilic scandium carbene complex (2) has
been synthesized by salt metathesis on ScCl3 (THF) 3 in 52% isolated yield. The X-ray …

The synthesis and characterization of a series of bis (8-quinolinato) aluminum ethyl
complexes, substituted at the 2-, 5-, and 7-positions on the 8-quinolinol ligand, are …

The first phosphoniomethylidene complexes of scandium and lutetium,[L Ln (CHPPh3)
X](L=[MeC (NDIPP) CHC (NDIPP) Me]−; Ln= Sc, X= Me, I, TfO; Ln= Lu, X= CH2SiMe3), have …