Insertion reactions of scandium pyridyl complexes supported by a ferrocene diamide ligand

In situ generation of uranium alkyl complexes

“…The reactivity of uranium complexes can be substantially modulated by tuning the electronic and steric properties of their ancillary-ligand framework. [1][2][3][4][5][6][7][8][9] We have been interested in the reactivity of d 0 f n metal centers supported by ferrocene ligands [10][11][12][13][14][15][16][17] and proposed that a weak interaction, of donor-acceptor type, takes place between iron and the metal when ferrocene diamides (NN fc = fc(NSi t BuMe 2 ) 2 , fc = 1,1 0ferrocenylene, Chart 1) are used. 18,19 For uranium complexes, we recently reported novel C-H activation reactions by (NN fc )U(CH 2 Ph) 2 , 1 fc -U(CH 2 Ph) 2 , with both benzyl ligands of 1 fc -U(CH 2 Ph) 2 engaging an sp 2 -C-H bond of 1-methylimidazole.…”

Aromatic C–F Bond Activation by Rare-Earth-Metal Complexes

“…As part of our group's continuing efforts to explore the chemistry of rare-earth metals and actinides supported by ferrocene-derived ligands, [55][56][57][58][59][60][61][62] especially redox reactions in the presence of arenes, [63][64][65][66][67][68][69][70][71] we discovered a bimetallic cleavage of the C-H bond of benzene by (NN TBS ) . In addition, the C-H bond activation of a naphthalene dianion sandwiched between two lutetium ions in the previously isolated [(NN TBS )Lu(THF)]2(μ-C10H8) (4-Lu2) was observed upon moderate heating (Scheme 2c).…”

“…As part of our group’s continuing efforts to explore the chemistry of rare-earth metals and actinides supported by ferrocene-derived ligands, − especially redox reactions in the presence of arenes, − we discovered a bimetallic cleavage of the C–H bond of benzene by (NN TBS )­MI­(THF) 2 ( 1-M , H 2 (NN TBS ) = fc­(NHSi t BuMe 2 ) 2 , fc =1,1′-ferrocenediyl; M = Sc, Y, Lu) and potassium graphite (KC 8 ) to form an equimolar mixture of [(NN TBS )­M­(μ-H) 2 (THF) x ] 2 ( 2-M 2 : M = Sc, x = 0, 1; M = Y or Lu, x = 1) and (NN TBS )­MPh­(THF) ( 3-M ; Scheme a,b). In addition, the C–H bond activation of a naphthalene dianion sandwiched between two lutetium ions in the previously isolated [(NN TBS )­Lu­(THF)] 2 (μ-C 10 H 8 ) ( 4-Lu 2 ) was observed upon moderate heating (Scheme c) .…”

Scandium, yttrium, the lanthanides

“…26 27 Scandium Z 2 -(N,C)-pyridyl complexes supported by a ferrocene diamide ligand produce coupling reactions with pyridines. 28 Scandium and yttrium complexes of a heteroscorpionate [N,N,O]-ligand, like [Sc(CH 2 SiMe 3 ) 2 (bpzmp)(thf)], have been studied as ethylene polymerisation catalysts. 29…”