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3D model (JSmol)
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ChemSpider | |
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
C28H28Zr | |
Molar mass | 455.756 g·mol−1 |
Appearance | orange solid |
Density | 1.34-1.39 g/cm3[1] |
Melting point | 133–134 °C (271–273 °F; 406–407 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tetrabenzylzirconium is an organozirconium compound with the formula Zr(CH2C6H5)4. The molecule features diamagnetic Zr(IV) bonded to four benzyl ligands. It is an orange air- and photo-sensitive solid, which is soluble in hydrocarbon solvents. The compound is a precursor to catalysts for the polymerization of olefins.[2] [3]
X-ray crystallography demonstrates that the benzyl ligands are highly flexible: one polymorph features four η2-ligands, whereas another has two η1- and two η2-benzyl ligands.[1]
The compound is prepared by combining benzylmagnesium chloride and zirconium tetrachloride in diethyl ether.[4]
Tetrabenzylzirconium readily undergoes protonolysis, e.g. with hydrogen chloride: