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The Cu<jats:sup>II<\/jats:sup> center has a distorted square-pyramidal geometry in which the nitrogen atoms of the DQMEA and CH<jats:sub>3<\/jats:sub>CN ligands occupy the equatorial positions, while the oxygen atom of the DQMEA ligand resides in the axial position with an elongated Cu\u2014O bond. The quinoline ring systems are nearly co-planar in the structure, while the linear CH<jats:sub>3<\/jats:sub>CN ligand is tilted significantly below this plane, and the central nitrogen of DQMEA is above it. Within the complex, weak C\u2014H...N hydrogen bonding takes place between the nitrogen of CH<jats:sub>3<\/jats:sub>CN and a neighboring quinolyl group. The perchlorate ions are disordered within the structure, but undergo a number of weak intermolecular C\u2014H...O hydrogen-bonding interactions. Additional weak \u03c0-stacking interactions between the quinolyl groups of neighboring complexes further stabilize the crystal packing.<\/jats:p>","DOI":"10.1107\/s2056989018010319","type":"journal-article","created":{"date-parts":[[2018,7,24]],"date-time":"2018-07-24T08:17:30Z","timestamp":1532420250000},"page":"1138-1141","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["Crystal structure of a mononuclear copper(II) complex with 2-methoxy-<i>N<\/i>,<i>N<\/i>-bis(quinolin-2-ylmethyl)ethylamine (DQMEA)"],"prefix":"10.1107","volume":"74","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4163-0183","authenticated-orcid":true,"given":"Steven T.","family":"Frey","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jason","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Manpreet","family":"Kaur","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2302-1886","authenticated-orcid":true,"given":"Jerry P.","family":"Jasinski","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2018,7,24]]},"reference":[{"key":"tx2007_bb1","doi-asserted-by":"crossref","first-page":"1349","DOI":"10.1039\/DT9840001349","author":"Addison","year":"1984","journal-title":"J. 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