Monocyclopentadienyls

The most active catalyst precursors are the monocyclopentadienyl complexes [Me2Si(C5Me4)(t-BuN)]LnN(TMS)2 [132]. Comparative reactivities for the IH of H2NCH2C(Me)2CH2CH=CH2 to give 2,4,4-trimethylpyrrolidine are given in Table 4-1. 

Figure 33 The structure of the dimeric monocyclopentadienyl [CpMg(MeNCH2CH2NMe2)]2 62.

The monocyclopentadienyl halide (CsPr FOCaRTHFld 2> can be derivatized in a metathetical reaction with K[BHT] (HBHT = HOC6H2-But2-2,6-Me-4) to yield the aryloxide derivative (CsPri4H)Ca(BHT)(THF) in high yield.295 The aryloxide can also be prepared by the reaction of (C5Pr 4H)Ca[N(SiMe3)2](THF) with HBHT in... 

Dimethyl- and diethylzinc reacted with dimethylpyrrole- and mesityl-substituted cyclopentadiene ligands to give monocyclopentadienyl(methyl)zinc and -ethyl(zinc) compounds. These products then formed, Scheme 20, crystalline adducts with tetramethylethylenediamine (TMEDA) such as 24, whose solid-state structure is shown in Figure 11. 

Several cationic titanium and zirconium monocyclopentadienyl derivatives, [Cp MR2]+ (M = Ti, Zr), have been synthesized by the reaction of MR3Cp ... 

Among titanium-based precursors, monocyclopentadienyl compounds of the type CpTiCl3 or Cp TiCl3 activated by MAO or B(C6F5)3 showed the best performance, although several substituted mono-Cp or indenyl derivative and Cp-free compounds as Ti(CH2Ph)4 and Ti(OR)4 (R = alkyl, aryl) are quite active as well. In short, practically any soluble titanium compound can be used as precatalyst.154-158... 

Monocyclopentadienyl compounds, 25 116 Monodentate chelants, 5 709 Monodentate ligands, 9 396 Monodisperse model networks, with silicone, 22 570... 

There have been some electrochemical studies of monocyclopentadienyl Ti and Zr systems including [Ti or Zr () -C5H5)R2],... 

High-activity monocyclopentadienyl complexes, (II), containing indene were prepared by the authors (2) and used in the polymerization of ethylene. 

Reactions of CoCl2(PPh3)2 with TICp subsequently followed by treatment with [M(ArN3Ar)] (M = Cu1, Ag1) afforded CoCp(RN3R)(PPh3). These complexes are representatives of the very small number of paramagnetic monocyclopentadienyl complexes. ESR spectra indicate the presence of low spin Con in an environment of low symmetry (22).,0S... 

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