Transformation of the bis(trimethylsilyl)methyl into aza-allyl and β-diketinimato ligands; the X-ray structures of [Li{N(R)C(Bu^t)CH(R)}]₂and [Zr{N(R)C(Bu^t)CHC(Ph)N(R)}Cl₃](R = SiMe₃)

Novel Syntheses of Symmetric Alkyl-substituted β-Diketimines with Dimethylsulfate Assisted by Microwave

“…A Zr complex with a β-diketiminate was reported to show catalytic activity toward ethylene and propylene polymerization 4 and similar catalytic activities were found by Collins. 5 Other results are extensively reviewed in the literature 6 but β-diketiminates with only aryl substituents have been generally adopted.…”

Retro-Brook rearrangement induces the formation of an octahedral nickel(benzamidinate) complex; synthesis, structure and catalytic activity

“…Synthesis and characterization of the complex 1,3-diazaallyl-acetylacetonate Ni (7) The b-diketiminate lithium complex 5 [27] and bis(acetylacetonato)Ni(TMEDA) (6) (TMEDA = N,N, N 0 ,N 0 -tetramethylethylendiamine) [28] were synthesized following the literature procedures. Reaction of (TME-DA)Ni(acac) 2 with an equimolar amount of complex 5 in toluene at ambient temperature provided complex (PhC(NSiMe 3 )NC(Ph)@CHSiMe 3 )Ni(acac)(TMEDA) (7), bearing the 1,3-diazaallyl ligand, which is formed through the isomerization of the corresponding b-diketiminate moiety (Eq.…”

“…Norbornene (bicyclo-[2.2.1]hept-2-ene) was purchased and used as received (Aldrich). The lithium b-diketiminate [27] 5 and (TMEDA)Ni(acac) 2 (6) [28], were prepared via the literature procedures.…”

Reaction of 9-trimethylsilylfluorenyllithium with nitriles: Organolithium compounds

“…The azaallyl alkali-metal compounds [5][6][7][8] were easily prepared by the coupling reaction of bis (trimethylsily)methylmetal compounds with α-H-free nitriles [9,10]. The first facial η 3 -azaallyl model was confirmed within [Li{μ-N(SiMe 3 ) C( t Bu)CH(SiMe 3 )}] 2 [10], whilst the first η 1 -fashion was observed in pyridyl-1-azaallyl-lithium, [(2-(6-R-Pyr)(Me 3 Si)CHLi·OEt 2 ] 2 [11]. The reaction of Li 2 {η 5 -C 5 H 4 Si(Me) 2 C(H)SiMe 3 } with t BuCN produced a silyl-bridged cyclopentadienyl-azaallyl-lithium [12].…”