1094077-59-4

Basic information

• Product Name: Me2Si(C5H4)2ZrCl(μ-H)2Al(i-Bu)2
• Synonyms: Me2Si(C5H4)2ZrCl(μ-H)2Al(i-Bu)2
• CAS NO: 1094077-59-4
• Molecular Weight: 456.234
• Mol File: 1094077-59-4.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: Me2Si(C5H4)2ZrCl(μ-H)2Al(i-Bu)2(CAS DataBase Reference)
• NIST Chemistry Reference: Me2Si(C5H4)2ZrCl(μ-H)2Al(i-Bu)2(1094077-59-4)
• EPA Substance Registry System: Me2Si(C5H4)2ZrCl(μ-H)2Al(i-Bu)2(1094077-59-4)

Safety Data

• Hazardous Substances Data: 1094077-59-4(Hazardous Substances Data)

Upstream product

• 86050-32-0 dimethylsilylenebiscyclopentadienylzirconium dichloride 
• 1191-15-7 diisobutylaluminium hydride 

Relevant articles and documents

Alkylaluminum-complexed zirconocene hydrides: Identification of hydride-bridged species by NMR spectroscopy

Reactions of unbridged zirconocene dichlorides, (RnC 5H5-n)2ZrCl2 (n=0, 1, or 2), with diisobutylaluminum hydride (HAI'Bu2) result in the formation of tetranuclear trihydride clusters of the type (RnC5H 5-n)2Zr(μ-H)3(Al iBu2)3(μ-CI) 2, which contain three [Al iBu2] units. Ring-bridged ansa-zirconocene dichlorides, Me2E(RnC5H 4-n)2ZrCl2 with E=C or Si, on the other hand, are found to form binuclear dihydride complexes of the type Me2E(R nC5H4-n)2Zr(CI)(μ-H) 2Al iBu2 with only one [AIBu2] unit. The dichotomy between unbridged and bridged zirconocene derivatives with regard to tetranuclear versus binuclear product formation is proposed to be connected to different degrees of rotational freedom of their C5-ring ligands. Alkylaluminum-complexed zirconocene dihydrides, previously observed in zirconocene-based precatalyst systems activated by methylalumoxane (MAO) upon addition of HAI'Bu2 or Al iBu3, are proposed to be species of the type Me2Si(ind)2Zr(Me)(μ-H) 2Al iBu2, stabilized by interaction of their terminal Me group with a Lewis acidic site of MAO.