{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,5]],"date-time":"2026-09-05T02:56:37Z","timestamp":1788576997239,"version":"build-2803163510"},"reference-count":94,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2022,6,24]],"date-time":"2022-06-24T00:00:00Z","timestamp":1656028800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100006769","name":"Russian Science Foundation","doi-asserted-by":"publisher","award":["22-23-20123"],"award-info":[{"award-number":["22-23-20123"]}],"id":[{"id":"10.13039\/501100006769","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100006769","name":"Russian Science Foundation","doi-asserted-by":"publisher","award":["18-73-00148"],"award-info":[{"award-number":["18-73-00148"]}],"id":[{"id":"10.13039\/501100006769","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100006769","name":"Russian Science Foundation","doi-asserted-by":"publisher","award":["contract r-39"],"award-info":[{"award-number":["contract r-39"]}],"id":[{"id":"10.13039\/501100006769","id-type":"DOI","asserted-by":"publisher"}]},{"name":"government of the Novosibirsk region","award":["22-23-20123"],"award-info":[{"award-number":["22-23-20123"]}]},{"name":"government of the Novosibirsk region","award":["18-73-00148"],"award-info":[{"award-number":["18-73-00148"]}]},{"name":"government of the Novosibirsk region","award":["contract r-39"],"award-info":[{"award-number":["contract r-39"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>The reactions of CuX2 (X = Cl, Br) with dipinodiazafluorenes yielded four new complexes [CuX2L1]2 (X = Cl (1), Br (2), L1 = (1R,3R,8R,10R)-2,2,9,9-Tetramethyl-3,4,7,8,9,10-hexahydro-1H-1,3:8,10-dimethanocyclopenta [1,2-b:5,4-b\u2019]diquinolin-12(2H)-one) and [(CuX2)2L2]n (X = Cl (3), Br (4), L2 = (1R,3R,8R,10R,1\u2019R,3\u2019R,8\u2019R,10\u2019R)-2,2,2\u2019,2\u2019,9,9,9\u2019,9\u2019-Octamethyl-1,1\u2019,2,2\u2019,3,3\u2019,4,4\u2019,7,7\u2019,8,8\u2019,9,9\u2019,10,10\u2019-hexadecahydro-1,3:1\u2019,3\u2019:8,10:8\u2019,10\u2019-tetramethano-12,12\u2019-bi(cyclopenta [1,2-b:5,4-b\u2019]diquinolinylidene). The complexes were characterized by IR and EPR spectroscopy, HR-ESI-MS and elemental analysis. The crystal structures of compounds 1, 2 and 4 were determined by X-ray diffraction (XRD) analysis. Complexes 1\u20132 have a monomeric structure, while complex 4 has a polymeric structure due to additional coordinating N,N sites in L2. All complexes contain a binuclear fragment {Cu2(\u03bc-X)2\u00d72} (X = Cl, Br) in their structures. Each copper atom has a distorted square-pyramidal coordination environment formed by two nitrogen atoms and three halogen atoms. The Cu-Nax distance is elongated compared to Cu-Neq. The EPR spectra of compounds 1\u20134 in CH3CN confirm their paramagnetic nature due to the d9 electronic configuration of the copper(II) ion. The magnetic properties of all compounds were studied by the method of static magnetic susceptibility. For complexes 1 and 2, the effective magnetic moments are \u00b5eff \u2248 1.87 and 1.83 \u00b5B (per each Cu2+ ion), respectively, in the temperature range 50\u2013300 K, which are close to the theoretical spin value (1.73 \u00b5B). Ferromagnetic exchange interactions between Cu(II) ions inside {Cu2(\u03bc-X)2X2} (X = Cl, Br) dimers (J\/kB \u2248 25 and 31 K for 1 and 2, respectively) or between dimers (\u03b8\u2032 \u2248 0.30 and 0.47 K for 1 and 2, respectively) were found at low temperatures. For compounds 3 and 4, the magnetic susceptibility is well described by the Curie\u2013Weiss law in the temperature range 1.77\u2013300 K with \u00b5eff \u2248 1.72 and 1.70 \u00b5B for 3 and 4, respectively, and weak antiferromagnetic interactions (\u03b8 \u2248 \u22120.4 K for 3 and \u22120.65 K for 4). Complexes 1\u20134 exhibit high catalytic activity in the oxidation of alkanes and alcohols with peroxides. The maximum yield of cyclohexane oxidation products reached 50% (complex 3). Based on the data on the study of regio- and bond-selectivity, it was concluded that hydroxyl radicals play a decisive role in the oxidation reaction. The initial products in reactions with alkanes are alkyl hydroperoxides.<\/jats:p>","DOI":"10.3390\/molecules27134072","type":"journal-article","created":{"date-parts":[[2022,6,26]],"date-time":"2022-06-26T21:01:41Z","timestamp":1656277301000},"page":"4072","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Novel Copper(II) Complexes with Dipinodiazafluorene Ligands: Synthesis, Structure, Magnetic and Catalytic Properties"],"prefix":"10.3390","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7916-5008","authenticated-orcid":false,"given":"Iakov S.","family":"Fomenko","sequence":"first","affiliation":[{"name":"Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Medhanie","family":"Afewerki","sequence":"additional","affiliation":[{"name":"Department of Natural Sciences, Novosibirsk State University, 1 Pirogova Str., 630090 Novosibirsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marko I.","family":"Gongola","sequence":"additional","affiliation":[{"name":"Department of Natural Sciences, Novosibirsk State University, 1 Pirogova Str., 630090 Novosibirsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eugene S.","family":"Vasilyev","sequence":"additional","affiliation":[{"name":"Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, 9 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1448-9228","authenticated-orcid":false,"given":"Lidia S.","family":"Shul\u2019pina","sequence":"additional","affiliation":[{"name":"A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova. 28, 119991 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nikolay S.","family":"Ikonnikov","sequence":"additional","affiliation":[{"name":"A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova. 28, 119991 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Georgiy B.","family":"Shul\u2019pin","sequence":"additional","affiliation":[{"name":"N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, ul. Kosygina, 4, 119991 Moscow, Russia"},{"name":"Chemistry and Physics, Plekhanov Russian University of Economics, Stremyannyi Pereulok, 36, 117997 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2688-4521","authenticated-orcid":false,"given":"Denis G.","family":"Samsonenko","sequence":"additional","affiliation":[{"name":"Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1512-3049","authenticated-orcid":false,"given":"Vadim V.","family":"Yanshole","sequence":"additional","affiliation":[{"name":"International Tomography Center, Siberian Branch of Russian Academy of Sciences, 3a Institutskaya Str., 630090 Novosibirsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vladimir A.","family":"Nadolinny","sequence":"additional","affiliation":[{"name":"Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander N.","family":"Lavrov","sequence":"additional","affiliation":[{"name":"Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexey V.","family":"Tkachev","sequence":"additional","affiliation":[{"name":"Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, 9 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3214-1433","authenticated-orcid":false,"given":"Artem L.","family":"Gushchin","sequence":"additional","affiliation":[{"name":"Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2058","DOI":"10.1038\/s41467-017-01966-7","article-title":"Highly enantioselective catalytic synthesis of chiral pyridines","volume":"8","author":"Jumde","year":"2017","journal-title":"Nat. Commun."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1413","DOI":"10.1002\/ejic.200901142","article-title":"Synthesis and Characterisation of a Novel Chiral Bidentate Pyridine-N-Heterocyclic Carbene-Based Palladacycle","volume":"2010","author":"Chiang","year":"2010","journal-title":"Eur. J. Inorg. 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