120059-91-8

Upstream product

• 63830-85-3 chloro(trimethylsilyl)methyl lithium 
• 111005-12-0 bis(η5-cyclopentadienyl)p-tolyl{(phenylthio)(trimethylsilyl)methyl}zirconium 
• 111005-10-8 bis(η5-cyclopentadienyl)zirconium{C(2)H(thiophenyl)(trimethylsilyl)} 

Relevant academic research and scientific papers

Thermally induced rearrangement of α-zirconocenyl thioethers: Carbon-carbon bond formation via a transition-metal hydroxymethyl or metalloxirane analogue

The thermal rearrangement of α-zirconocenyl thioethers (η5-C5H5)2Zr(Ar)[CH(SC 6H5)(Si(CH3)3)] (Ar = C6H5, p-C6H4CH3, p-C6H4OCH3, p-C6H4Cl) and (η5-C5H5)2ZrC6H 5[CH(SCH3)(Si(CH3)3)] in toluene solution follows clean first-order kinetics to produce (η5-C5H5)2Zr(SC 6H5)[CH(Ar)(Si(CH3)3)] and (η5-C5H5)2Zr-(SCH 3)[CH(C6H5)(Si(CH3)3)]. Labeling studies using (η5-C5H5)2Zr(p-C 6H4CH3)[CH(SC6H 5)(Si(CH3)3)] and (η5-C5H5)2ZrC6H 5[CD(SC6H5)(Si(CH3)3)] show this rearrangement to be intramolecular. Activation parameters for the rearrangement of (η5-C5H5)2ZrC6H 5[CH(SC6H5)(Si(CH3)3)] were found to be ΔH? = 20.30 (43) kcal/mol and ΔS? = -19.0 (2) eu. It is proposed that this rearrangement proceeds by intramolecular nucleophilic attack (migration) of the aryl group to the methylene carbon with commensurate breaking of the C-S bond. A Hammett plot of log (kobsd) for the rearrangement of (η5-C5H5)2Zr(Ar)[CH-(SC 6H5)(Si(CH3)3)] versus σp produces a straight line (p = -2.22 (9)), supporting this mechanism.