This review describes the syntheses and coordination chemistry of selected unsaturated borataheterocycles. These compounds are formally derived from common heteroaromatic rings by the isoelectronic substitution of an anionic BH − group for a neutral CH group. Specifically included are the five-membered rings 1,2- and 1,3-thiaborolyls, derived from thiophene, 1,2-oxaborolyl, derived from furan, and 1,2-azaborolyl, derived from pyrrole. Also included is the six-membered ring 1,2-azaboratabenzene, derived from pyridine. These anionic rings can serve as surrogates for cyclopentadienyl in organometallic compounds.
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Arthur J. Ashe (2009) studied this question.
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