{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,22]],"date-time":"2026-01-22T20:36:46Z","timestamp":1769114206001,"version":"3.49.0"},"reference-count":109,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2023,12,7]],"date-time":"2023-12-07T00:00:00Z","timestamp":1701907200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia, Portugal","award":["UID\/QUI\/00100\/2019"],"award-info":[{"award-number":["UID\/QUI\/00100\/2019"]}]},{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia, Portugal","award":["UIDB\/00100\/2020"],"award-info":[{"award-number":["UIDB\/00100\/2020"]}]},{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia, Portugal","award":["UIDP\/00100\/2020"],"award-info":[{"award-number":["UIDP\/00100\/2020"]}]},{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia, Portugal","award":["LA\/P\/0056\/2020"],"award-info":[{"award-number":["LA\/P\/0056\/2020"]}]},{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia, Portugal","award":["SFRH\/BD\/87679\/2012"],"award-info":[{"award-number":["SFRH\/BD\/87679\/2012"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>[(Bn2Cyclam)Y(N(SiMe3)2)] was prepared by reaction of H2Bn2Cyclam with Y[N(SiMe3)2]3. The protonation of the macrocycle ligand in [(Bn2Cyclam)Y(N(SiMe3)2)] is observed upon reaction with [HNMe3][BPh4] leading to the formation of [(HBn2Cyclam)Y(N(SiMe3)2)][BPh4]. DFT analysis of [(Bn2Cyclam)Y(N(SiMe3)2)] showed that the HOMO is located on the anionic nitrogen atoms of the cyclam ring indicating that protonation follows orbital control. Addition of H2Bn2Cyclam and H2(3,5-tBu2Bn)2Cyclam to a 1:3 mixture of YCl3 and LiCH2SiMe3 in THF resulted in the formation of [((C6H4CH2)BnCyclam)Y(THF)(\u00b5-Cl)Li(THF)2] and [Y{(\u03b73-3,5-tBu2Bn)2Cyclam}Li(THF)], respectively. The reaction of H23,5-tBu2Bn2Cyclam with Y(CH2SiMe3)3(THF)2 was studied and monitored by a temperature variation NMR experiment revealing the formation of [(3,5-tBu2Bn2Cyclam)Y(CH2SiMe3)]. Preliminary catalytic assays have shown that [Y{(\u03b73-3,5-tBu2Bn)2Cyclam}Li(THF)] is a very efficient catalyst for the intramolecular hydroamination of 2,2-diphenyl-pent-4-enylamine.<\/jats:p>","DOI":"10.3390\/molecules28247998","type":"journal-article","created":{"date-parts":[[2023,12,7]],"date-time":"2023-12-07T10:45:33Z","timestamp":1701945933000},"page":"7998","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Synthesis, Characterization, and Reactivity Studies of New Cyclam-Based Y(III) Complexes"],"prefix":"10.3390","volume":"28","author":[{"given":"Filipe","family":"Madeira","sequence":"first","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5841-3519","authenticated-orcid":false,"given":"Luis F.","family":"Veiros","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7938-9850","authenticated-orcid":false,"given":"Luis G.","family":"Alves","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Associa\u00e7\u00e3o do Instituto Superior T\u00e9cnico para a Investiga\u00e7\u00e3o e Desenvolvimento, Av. Ant\u00f3nio Jos\u00e9 de Almeida n\u00ba 12, 1000-043 Lisbon, Portugal"}]},{"given":"Ana M.","family":"Martins","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2023,12,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"10","DOI":"10.1016\/j.ccr.2016.09.013","article-title":"A quarter-century long story of bis(alkyl) rare-earth (III) complexes","volume":"340","author":"Trifonov","year":"2017","journal-title":"Coord. Chem. Rev."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"428","DOI":"10.1016\/j.trechm.2020.11.007","article-title":"Early Transition Metal-Catalyzed Hydroamination","volume":"3","author":"Schafer","year":"2021","journal-title":"Trends Chem."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"7697","DOI":"10.1039\/c1dt10222b","article-title":"Structure-activity relationships in group 3 metal catalysts for asymmetric intramolecular alkenehydroamination. 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