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Updated: Nov 10, 2025

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
A 35-year-old mystery solved: a facile synthetic route and structural confirmation of tetrachlorobis(diethyl
Thomas E Shaw1, Alfred P Sattelberger1, Titel Jurca1
1Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
Abstract:
The true identity of the diethyl ether adduct of tungsten(IV) chloride, WCl4(Et2O)x, has been in doubt since 1985. Initially postulated as the bis-adduct, WCl4(Et2O)2, questions arose when elemental analyses were more in line with a mono-ether adduct, viz. WCl4(Et2O). It was proposed that this was due to the thermal instability of the bis-adduct. Here, we report the room-temperature X-ray crystal structure and Hirshfeld surface characteristics of trans-tetrachloridobis(diethyl ether)tungsten(IV), trans-WCl4(Et2O)2 or trans-[WCl4(C4H10O)2]. The compound crystallizes, with half of the molecule in the asymmetric unit, in the centrosymmetric space group P21/n. The W-O distance is 2.070 (2) Å, while the W-Cl distances are 2.3586 (10) and 2.3554 (10) Å.
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