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

Two 18ē TiIVη5-Cp-tris(sec-amido)-type complexes derived from 1H-imidazol-2-yl side-chain functionalized cyclopentadienes

“…NMR data (see Experimental) in both C 6 D 6 and THF-d 8 (THF is tetrahydrofuran) are indicative of the pseudo-C s symmetry of (I) at ambient temperature. This fluxional behaviour is rather typical for the class of compounds to which complex (I) belongs (see, for example, Krut'ko et al, 1996aKrut'ko et al, ,b, 1998Krut'ko et al, , 2003Krut'ko et al, , 2004Krut'ko et al, , 2005Krut'ko et al, , 2006Nie et al, 2008) and is, actually, a degenerate interconversion of the Ti1-C11-C5-C4-C1-N1-(Ti1) six-membered pseudo-metallacycle. The 'remains' of this flexibility, of interest, are also noticeable even in the solid state, where this interconversion is 'frozen' and (I) is represented by two enantiomorphic conformers.…”

“…1H-Imidazol(in)-2-yl side-chain functionalized cyclopentadienes (Cp) were introduced as ligands into the organometallic chemistry of the Group 4 transition metals not long ago (Krut'ko et al, 2006;Nie et al, 2008). However, in all of the Ti (and Zr) complexes described in these papers, the imidazol(in)e part of the ligands possesses methyl groups at the N1 atoms and the M-N bonds are, in actual fact, coordination ones.…”

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.…”

2-{(E)-N-[2-(1H-Inden-3-yl)ethyl]iminomethyl}-1H-imidazole

“…For the structural parameters of 2organyl-1H-imidazoles (organic structures only, not bi-or oligocyclic, non-ionic, recent publications only), see: Lassalle-Kaiser et al (2006). For the structural parameters of Li, Ti, and Zr complexes derived from 1H-imidazol(in)-2-yl side-chainfunctionalized cyclopentadienes see: Krut'ko et al (2006); Nie et al (2008); Wang et al (2009); Ge et al (2010). For the structural parameters of 1H-imidazol(in)-2-yl side-chainfunctionalized 3-substituted 1H-indene and Li-indenide, see: Sun et al (2009Sun et al ( , 2010.…”