Bis(η-cyclo-penta-dien-yl)bis-(2,4,6-tri-methyl-phenyl-tellurolato)zirconium(IV).

Andrew L Hector,Stuart D Reid,William Levason,Michael Webster,Gillian Reid

doi:10.1107/s1600536808009574

Andrew L Hector, Stuart D Reid + Show 3 more

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https://doi.org/10.1107/s1600536808009574

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Abstract

The structure of the title compound, [Zr(C5H5)2(C9H11Te)2], consists of a zirconium(IV) centre bonded to two η5-coordinated cyclopentadienyl groups and two mesityltellurolate ligands; the discrete molecule has crystallographic twofold rotation symmetry. The structural parameters compared with those in [(η5-Me5Cp)2Zr(TePh)2] [Howard, Trnka & Parkin (1995 ▶). Inorg. Chem. 34, 5900–5909] show that the greater steric demands of the bulky mesityl substituents are accommodated by widening Te—Zr—Te (∼8°) and by more acute Zr—Te—C (∼5°) angles, although the Zr—Te distances are essentially the same. The crystal studied exhibited some inversion twinning.

Highlights

The structure of the title compound, [Zr(C5H5)2(C9H11Te)2], consists of a zirconium(IV) centre bonded to two 5-coordinated cyclopentadienyl groups and two mesityltellurolate ligands; the discrete molecule has crystallographic twofold rotation symmetry
Chem. 34, 5900–5909] show that the greater steric demands of the bulky mesityl substituents are accommodated by widening Te—Zr—Te ($8) and by more acute Zr—Te—C ($5) angles, the Zr—Te distances are essentially the same
R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger

Summary

Structure Reports Online

Key indicators: single-crystal X-ray study; T = 120 K; mean (C–C) = 0.011 A; R factor = 0.040; wR factor = 0.087; data-to-parameter ratio = 21.0. The structure of the title compound, [Zr(C5H5)2(C9H11Te)2], consists of a zirconium(IV) centre bonded to two 5-coordinated cyclopentadienyl groups and two mesityltellurolate ligands; the discrete molecule has crystallographic twofold rotation symmetry. The structural parameters compared with those in [(5-Me5Cp)2Zr(TePh)2] [Howard, Trnka & Parkin (1995). The crystal studied exhibited some inversion twinning. Related literature For a review, see: Arnold (1995). See: Christou et al (1993); Hector et al (2008); Howard et al (1995); Sato & Yoshida (1974)

Bruker Nonius KappaCCD diffractometer

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