Synthesis and characterization of Zr(IV) and Y(III) complexes with monocyclopentadienyl ligands containing an additional site tethered by a coordinating 2,6-pyridine bridge. X-ray crystal structures of the zirconium complexes

Trichlorido(tetrahydrofuran){(1,2,3,3a,7a-η)-1-[2-(1-trimethylsilyl-1H-imidazol-2-yl-κN3)-1-methylpropyl]indenyl}zirconium(IV)

“…For the geometric parameters of similar Zr IV complexes, see: Nifant'ev et al (1998); Paolucci et al (2003); Krut'ko et al (2004Krut'ko et al ( , 2007; Enders et al (1996); Nie et al (2008). For Ti IV analogues of the title compound, see: Ge et al (2010) and references cited therein.…”

“…It has been prepared from bis(N,N-dimethyl- (C 16 Among them, there are two dinuclear structures where two Zr-atoms are linked with two bridging µ-Cl-atoms (Enders et al, 1996 andNie et al, 2008; in both cases Zr-atoms exhibit CN 6), two monomeric complexes with a pentacoordinated Zr centre (Nifant'ev et al, 1998 andKrut'ko et al, 2004), and, finally, three monomeric complexes with a hexacoordinated Zr centre (Paolucci et al, 2003;Krut'ko et al, 2004;Krut'ko et al, 2007). Of interest and despite of the different nature of the "sixth" n-donor ligand opposing the Cp-group [a tetrahydrothiophene molecule (Krut'ko et al, 2004), a pyridine molecule (Krut'ko et al, 2007), or a pendant OH-group (Paolucci et al, 2003)], the structural motif of the latter three complexes is very similar to that of I. As for the nature of the Cp-type ligand, only one case among all the mentioned above corresponds to an indenyl group (Nifant'ev et al, 1998).…”

1-Methylimidazolin-2-yl functionalized cyclopentadienyl complexes of titanium and zirconium. Crystal structure of {[η5:η1-κN-C5H4CPh2CH2-(1-Me–C3H4N2)]ZrCl2}2(μ-Cl)2

“…The Group 4 transition metal complexes with cyclopentadienyl ligands bearing a nitrogen-containing n-donor moiety in the side chain have been extensively studied (see reviews [1][2][3]) and still attract considerable attention [4][5][6][7][8][9][10][11][12][13][14]. In the most complexes of this type, the nitrogen atom is bound to aliphatic substituents and is either in an sp 3 -hybridized state (N ?…”

“…Complexes in which the N ? M coordination is provided by an sp 2 -hybridized nitrogen atom (aromatic or related azaheterocycle) are few and limited to pyridine or quinoline systems [9,[15][16][17][18][19][20][21][22][23][24] (i.e., to monoaza aromatic systems).…”

Complexes of titanium and zirconium based on [C5Me4CH2-(2-C5H4N)] ligand

“…In recent years the Group 4 metal complexes prepared from linked cyclopentadienyl-(N-aromatic heterocycle) bidentate ligands attract considerable attention [1][2][3][4][5][6][7][8]. However, only few complexes of the type containing ringperalkylated Cp-moiety were reported [2,8].…”