in toluene 25 mmol SnCl4 (25 mmol) in toluene were added dropwise to a suspension of 100 mmol LiCCC6H5 in toluene within a period of 30 min at -78°C; after warming to room temp., the mixt. was refluxed for 3 h;; the mixt. was extracted with hexane/toluene 1:2 in a Soxhlet apparatus, and concd. in vac.;;
