Synthesis and reactivity of naphthalene complexes of ytterbium

Fluorenyl andansa-Dimethylsilylbis(fluorenyl) Derivatives of Divalent Ytterbium and Samarium − Synthesis and Structure of the First Mixed-Ligand LnII Classic Sandwich Complex (C13H9)(C5Me5)Yb(DME)

“…of C 13 H 9 K in THF, which resulted in the formation of (C 13 H 9 ) 2 Yb(THF) 2 (1) in 72% yield, and (ii) by protolytic substitution of the naphthalene ligand in (C 10 H 8 )Yb(THF) 2 [28] (3) by fluorene which also afforded 1 in reasonable yields. Although in the Scheme 1 latter method the yield is somewhat lower, this allows the avoidance of the tedious procedure of KI separation (Scheme 1).…”

“…Fluorene and pentamethylcyclopentadiene were commercially available and used as received. YbI 2 (THF) 2 , [3] (C 10 H 8 )Yb(THF) 2 , [28] (µ-C 10 H 8 )[YbI(DME) 2 ] 2 (4), [49] and Me 2 Si(C 13 H 9 ) 2 [50] were prepared according to literature procedures. Ϫ IR spectra were recorded as Nujol mulls with a Specord M80 spectrophotometer, NMR spectra with a Bruker DPX200 spectrometer in [D 6 ]benzene or [D 8 ]THF at 298 K, chemical shifts for 1 H and 13 C NMR spectra were referenced internally using the residual solvent resonances and reported relative to TMS.…”

A Novel Route to Triphenylgermyl Europium Complexes. Crystal Structure of (Ph3Ge)2Eu(DME)3

“…EuI 2 (DME) 2 was prepared from equimolar amounts of powdered Eu metal and I 2 in DME and was recrystallized from DME. The complexes SmI 2 (THF) 3 [7], C 10 H 8 Eu(DME) 2 [8], and C 10 H 8 [EuI(DME) 2 ] 2 [9] were prepared according to literature procedures. The IR spectra were recorded (Nujol mulls, KBr plates) on a PerkinElmer 577 spectrometer and are reported in wavenumbers.…”

Attempted Synthesis of Divalent Neodymium Derivatives. Crystal Structure of the Nd(III) Complex [{NdCl2 (2 ,4 ,6-t-Bu3C6H2O )(μ-Cl)(THF)}Li(THF)2]2

“…Cleavage of the carbon-oxygen bonds of DME was observed even at room temper ature [5]. Such contradictions concerning the sta bility of Nd(II) derivatives as well as essential in consistencies regarding the nature of the complexes resulting mainly from lanthanoid halide interactions with alkaline metal naphthalenides as mentioned in [1] and [6,7] encouraged us to reinvestigate the complexes 1 and 2 and search for other synthetic routes to Nd(II) derivatives.…”