{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,11]],"date-time":"2025-11-11T13:28:06Z","timestamp":1762867686434,"version":"build-2065373602"},"reference-count":81,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2019,2,6]],"date-time":"2019-02-06T00:00:00Z","timestamp":1549411200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["SFRH\/BPD\/78264\/2011;SFRH\/BPD\/76192\/2011","SFRH\/BD\/52370\/2013","PTDC\/QEQ-QIN\/3967\/2014; UID\/QUI\/00100\/2013"],"award-info":[{"award-number":["SFRH\/BPD\/78264\/2011;SFRH\/BPD\/76192\/2011","SFRH\/BD\/52370\/2013","PTDC\/QEQ-QIN\/3967\/2014; UID\/QUI\/00100\/2013"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Inorganics"],"abstract":"<jats:p>Reaction of the o-[(o-hydroxyphenyl)methylideneamino]benzenesulfonic acid (H2L) (1) with CuCl2\u00b72H2O in the presence of pyridine (py) leads to [Cu(L)(py)(EtOH)] (2) which, upon further reaction with 2,2\u2019-bipyridine (bipy), pyrazine (pyr), or piperazine (pip), forms [Cu(L)(bipy)]\u00b7MeOH (3), [Cu2(L)2(\u03bc-pyr)(MeOH)2] (4), or [Cu2(L)2(\u03bc-pip)(MeOH)2] (5), respectively. The Schiff base (1) and the metal complexes (2\u20135) are stabilized by a number of non-covalent interactions to form interesting H-bonded multidimensional polymeric networks (except 3), such as zigzag 1D chain (in 1), linear 1D chain (in 2), hacksaw double chain 1D (in 4) and 2D motifs (in 5). These copper(II) complexes (2\u20135) catalyze the peroxidative oxidation of cyclic hydrocarbons (cyclooctane, cyclohexane, and cyclohexene) to the corresponding products (alcohol and ketone from alkane; alcohols, ketone, and epoxide from alkene), under mild conditions. For the oxidation of cyclooctane with hydrogen peroxide as oxidant, used as a model reaction, the best yields were generally achieved for complex 3 in the absence of any promoter (20%) or in the presence of py or HNO3 (26% or 30%, respectively), whereas 2 displayed the highest catalytic activity in the presence of HNO3 (35%). While the catalytic reactions were significantly faster with py, the best product yields were achieved with the acidic additive.<\/jats:p>","DOI":"10.3390\/inorganics7020017","type":"journal-article","created":{"date-parts":[[2019,2,6]],"date-time":"2019-02-06T11:51:12Z","timestamp":1549453872000},"page":"17","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Syntheses, Structures, and Catalytic Hydrocarbon Oxidation Properties of N-Heterocycle-Sulfonated Schiff Base Copper(II) Complexes"],"prefix":"10.3390","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8101-2016","authenticated-orcid":false,"given":"Susanta","family":"Hazra","sequence":"first","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal"}]},{"given":"Bruno G. M.","family":"Rocha","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4836-2409","authenticated-orcid":false,"given":"M. F\u00e1tima C.","family":"Guedes da Silva","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3047-2204","authenticated-orcid":false,"given":"Anirban","family":"Karmakar","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8323-888X","authenticated-orcid":false,"given":"Armando J. L.","family":"Pombeiro","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2019,2,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"13364","DOI":"10.1039\/C7DT02534C","article-title":"Flexibility and lability of a phenyl ligand in hetero-organometallic 3d metal\u2013Sn(IV) compounds and their catalytic activity in Baeyer\u2013Villiger oxidation of cyclohexanone","volume":"46","author":"Hazra","year":"2017","journal-title":"Dalton Trans."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"3777","DOI":"10.1021\/acs.cgd.6b00321","article-title":"Heterometallic Copper(II)\u2013Tin(II\/IV) Salts, Cocrystals, and Salt Cocrystals: Selectivity and Structural Diversity Depending on Ligand Substitution and the Metal Oxidation State","volume":"16","author":"Hazra","year":"2016","journal-title":"Cryst. 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