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Zinc\u20133-hydroxyflavonolate compounds, including those of quercetin, kampferol, and morin, generally exhibit bidentate coordination to a single Zn<jats:sup>II<\/jats:sup> center. The bipyridine-ligated zinc\u2013flavonolate compound reported herein, namely bis(\u03bc-4-oxo-2-phenyl-4<jats:italic>H<\/jats:italic>-chromen-3-olato)-\u03ba<jats:sup>3<\/jats:sup>\n                  <jats:italic>O<\/jats:italic>\n                  <jats:sup>3<\/jats:sup>:<jats:italic>O<\/jats:italic>\n                  <jats:sup>3<\/jats:sup>,<jats:italic>O<\/jats:italic>\n                  <jats:sup>4<\/jats:sup>;\u03ba<jats:sup>3<\/jats:sup>\n                  <jats:italic>O<\/jats:italic>\n                  <jats:sup>3<\/jats:sup>,<jats:italic>O<\/jats:italic>\n                  <jats:sup>4<\/jats:sup>:<jats:italic>O<\/jats:italic>\n                  <jats:sup>3<\/jats:sup>-bis[(2,2\u2032-bipyridine-\u03ba<jats:sup>2<\/jats:sup>\n                  <jats:italic>N<\/jats:italic>,<jats:italic>N<\/jats:italic>\u2032)zinc(II)] bis(perchlorate), {[Zn<jats:sub>2<\/jats:sub>(C<jats:sub>15<\/jats:sub>H<jats:sub>9<\/jats:sub>O<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub>(C<jats:sub>10<\/jats:sub>H<jats:sub>8<\/jats:sub>N<jats:sub>2<\/jats:sub>)<jats:sub>2<\/jats:sub>](ClO<jats:sub>4<\/jats:sub>)<jats:sub>2<\/jats:sub>}<jats:sub>\n                     <jats:italic>n<\/jats:italic>\n                  <\/jats:sub>, (<jats:bold>1<\/jats:bold>), provides an unusual example of bridging 3-hydroxyflavonolate ligation in a dinuclear metal complex. The symmetry-related Zn<jats:sup>II<\/jats:sup> centers of (<jats:bold>1<\/jats:bold>) exhibit a distorted octahedral geometry, with weak coordination of a perchlorate anion <jats:italic>trans<\/jats:italic> to the bridging deprotonated O atom of the flavonolate ligand. Variable-concentration conductivity measurements provide evidence that, when (<jats:bold>1<\/jats:bold>) is dissolved in CH<jats:sub>3<\/jats:sub>CN, the complex dissociates into monomers. <jats:sup>1<\/jats:sup>H NMR resonances for (<jats:bold>1<\/jats:bold>) dissolved in <jats:italic>d<\/jats:italic>\n                  <jats:sub>6<\/jats:sub>-DMSO were assigned <jats:italic>via<\/jats:italic> HMQC to the H atoms of the flavonolate and bipyridine ligands. In CH<jats:sub>3<\/jats:sub>CN, (<jats:bold>1<\/jats:bold>) undergoes quantitative visible-light-induced CO release with a quantum yield [0.004\u2005(1)] similar to that exhibited by other mononuclear zinc\u20133-hydroxyflavonolate complexes. Mass spectroscopic identification of the [(bpy)<jats:sub>2<\/jats:sub>Zn(<jats:italic>O<\/jats:italic>-benzoylsalicylate)]<jats:sup>+<\/jats:sup> ion provides evidence of CO release from the flavonol and of ligand exchange at the Zn<jats:sup>II<\/jats:sup> center.<\/jats:p>","DOI":"10.1107\/s2053229617011366","type":"journal-article","created":{"date-parts":[[2017,8,14]],"date-time":"2017-08-14T15:30:46Z","timestamp":1502724646000},"page":"703-709","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":4,"title":["A bipyridine-ligated zinc(II) complex with bridging flavonolate ligation: synthesis, characterization, and visible-light-induced CO release reactivity"],"prefix":"10.1107","volume":"73","author":[{"given":"Shayne","family":"Sorenson","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marina","family":"Popova","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Atta M.","family":"Arif","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9599-5239","authenticated-orcid":true,"given":"Lisa M.","family":"Berreau","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2017,8,14]]},"reference":[{"key":"lg3207_bb1","doi-asserted-by":"crossref","first-page":"6790","DOI":"10.1021\/ic0258072","volume":"41","author":"Allred","year":"2002","journal-title":"Inorg. 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