Answers are grounded in this paper and cite their sources.
Ethylene oxide gives the cyclic tetra-, penta-, and hexa-mer with BF3 in the presence of fluoroborate, fluorophosphates, or fluoroantimonates of alkali metals, alkaline earths or transitions metal.
No takes yet. Share an insight, caveat, or question.
Dale et al. (1976) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: