Electrochemical Studies on Organometallic Compounds. IV. Influence of the Substitution and of the Nature of the Ligands on the Products of the Electrochemical Reduction of Titanocene Mono- and Dichlorides.

Titanocene and Zirconocene Complexes containing Dendrimer-Substituted Cyclopentadienyl Ligands − Synthesis and Ethylene Polymerization

“…[11,12] Cyclic voltammograms of metallocene derivatives 5Ϫ10 were recorded in THF solution. Each complex shows a quasi-reversible electrode process due to a one-electron reduction of the titano-and zirconocene derivatives at the potentials summarized in Table 1 vs. the ferricinium/ferrocene couple.…”

Experimental and Theoretical Studies of Unusual Four‐Membered Metallacycles from Reactions of Group 4 Metallocene Bis(trimethylsilyl)acetylene Complexes with the Sulfurdiimide Me3SiN=S=NSiMe3

“…This butterfly orientation of the metallacycle has been observed previously for other group 4 complexes displaying M-N-S-N units. [14] Due to the high reducing potential of titanocene(II) fragments, [15] a two-electron transfer from the metallocene unit to the sulfurdiimide ligand can be proposed that results in an expanded S-N bond and the described butterfly motif. Without any electron transfer, molecule 4Ti may be described as a bis-π complex A. Stepwise electron transfer generates first a titanocene(III) sulfur diamide radical cat- ion B.…”

ansa-Metallocene derivatives

“…Results and discussion [8,[11][12][13][14][15][16] two prominent electrochemical processes are apparent, at potentials of about -1 V and -2.5 to -3 V, in cyclic-sweep voltammogrammes of tmen(Cp}zTiCI 2 in THF solution under argon (Fig. 1).…”

“…Redox properties of titanocene dichloride (Cp2TiCI2) have been studied fairly thoroughly by cyclic voltammetry as well as by other electrochemical methods [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In order to clarify some previously observed reactivity differences between bridged and unbridged titanocene derivatives [18] we have undertaken a cyclic voltammetry study of the redox reactions of a tetramethylethylene-bridged titano-cene derivative, (CH3)4C2(CsH4hTiCl2 (tmen(CphTiCl 2 ), as well as of its conversion into and its formation from the dicarbonyl complex (CH3)4C2(CsH4hTi(C0h-Experimental…”