Carr, BFleming, CLBlackman, AG2024-01-092024-01-092024-03-01Coordination Chemistry Reviews, ISSN: 0010-8545 (Print), Elsevier BV, 502, 215599-215599. doi: 10.1016/j.ccr.2023.2155990010-8545http://hdl.handle.net/10292/17074The literature pertaining to tri-, tetra-, penta-, and hexadentate amine ligands containing unsubstituted quinoline moieties is reviewed. The syntheses of these 46 ligands are detailed, and all X-ray structurally characterised transition metal complexes of these ligands are compiled and discussed. Comparisons to the analogous pyridine complexes, where they exist, are made. Most differences are found amongst the five-coordinate complexes, where the quinoline complexes mostly exhibit square pyramidal geometries, while the analogous pyridine complexes are predominantly trigonal bipyramidal. A structural feature we term the quinolyl split, where one or two quinolyl rings bisect an X-M-X angle, in contrast to their pyridine congeners, is identified.© 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).http://creativecommons.org/licenses/by/4.0/3402 Inorganic Chemistry34 Chemical Sciences0302 Inorganic Chemistry0306 Physical Chemistry (incl. Structural)0399 Other Chemical SciencesGeneral Chemistry3402 Inorganic chemistry4003 Biomedical engineeringJournal ArticleOpenAccess10.1016/j.ccr.2023.215599