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(6\u2010Dipp)CuB(OMe)<jats:sub>2<\/jats:sub> was characterised by NMR spectroscopy and X\u2010ray crystallography and shown to be a monomeric acyclic boryl of copper. (6\u2010Dipp)CuB(OMe)<jats:sub>2<\/jats:sub> reacted with ethylene and diphenylacetylene to provide insertion compounds into the Cu\u2010B bond which were characterised by NMR spectroscopy in both cases and X\u2010ray crystallography in the latter. It was also competent in the rapid catalytic deoxygenation of CO<jats:sub>2<\/jats:sub> in the presence of excess B<jats:sub>2<\/jats:sub>(OMe)<jats:sub>4<\/jats:sub>. Alongside \u03c0\u2010insertion, (6\u2010Dipp)CuB(OMe)<jats:sub>2<\/jats:sub> reacted with LiNMe<jats:sub>2<\/jats:sub> to provide a salt metathesis reaction at boron, giving (6\u2010Dipp)CuB(OMe)NMe<jats:sub>2<\/jats:sub>, a second monomeric acyclic boryl, which also cuproborated diphenylacetylene. Computational interrogation validated these acyclic boryl species to be electronically similar to (6\u2010Dipp)CuBpin.<\/jats:p>","DOI":"10.1002\/chem.202302704","type":"journal-article","created":{"date-parts":[[2023,10,11]],"date-time":"2023-10-11T05:04:16Z","timestamp":1697000656000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Acyclic Boryl Complexes of Copper(I)"],"prefix":"10.1002","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2716-9407","authenticated-orcid":false,"given":"Rex S. 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