Tetrabenzylzirconium

Source: Wikipedia, the free encyclopedia.
Tetrabenzylzirconium
Identifiers
3D model (
JSmol
)
ChemSpider
  • InChI=1S/4C7H7.Zr/c4*1-7-5-3-2-4-6-7;/h4*2-6H,1H2;/q4*-1;+4
    Key: QSLMQGXOMLSFAW-UHFFFAOYSA-N
  • [CH2-]C1=CC=CC=C1.[CH2-]C1=CC=CC=C1.[CH2-]C1=CC=CC=C1.[CH2-]C1=CC=CC=C1.[Zr+4]
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).

Tetrabenzylzirconium is an

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]

Structure, synthesis, reactions

Structure of tetrabenzylzirconium as determined by X-ray crystallography, with H atoms omitted for clarity.[1]

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:

Zr(CH2C6H5)4 + HCl → Zr(CH2C6H5)3Cl + CH3C6H5

References

  1. ^
    doi:10.1021/om300820b
    .
  2. doi:10.1021/ja001219g
    .
  3. doi:10.1016/S0022-328X(00)82618-2
    .
  4. ISBN 978-0471936237
    .
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