dc.contributor.author | Alexandropoulos, Dimitris I. | en |
dc.contributor.author | Moushi, Eleni E. | en |
dc.contributor.author | Papatriantafyllopoulou, Constantina | en |
dc.contributor.author | Beavers, Christine M. | en |
dc.contributor.author | Teat, S. J. | en |
dc.contributor.author | Tasiopoulos, Anastasios J. | en |
dc.contributor.author | Christou, George | en |
dc.contributor.author | Stamatatos, Theocharis C. | en |
dc.creator | Alexandropoulos, Dimitris I. | en |
dc.creator | Moushi, Eleni E. | en |
dc.creator | Papatriantafyllopoulou, Constantina | en |
dc.creator | Beavers, Christine M. | en |
dc.creator | Teat, S. J. | en |
dc.creator | Tasiopoulos, Anastasios J. | en |
dc.creator | Christou, George | en |
dc.creator | Stamatatos, Theocharis C. | en |
dc.date.accessioned | 2019-11-21T06:16:19Z | |
dc.date.available | 2019-11-21T06:16:19Z | |
dc.date.issued | 2016 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/55245 | |
dc.description.abstract | The employment of cyanato (OCN-) group in high oxidation state manganese cluster chemistry, in conjunction with carboxylate ions and the organic chelating/bridging ligand 2-(hydroxymethyl)pyridine (hmpH), is reported. The syntheses, crystal structures, and magnetochemical characterization are described for [Mn16O8(OR)4(OCN)4(O2CMe)12(hmp)6(ROH)2] (R = Me (1), Et (2)) and [Mn18O14(O2CR)18(hmp)4(hmpH)2(H2O)2] (R = Me (3), Et (4)). The 2:1:1:1 reactions of Mn(O2CMe)2·4H2O, hmpH, NaOCN and NEt3 in solvent MeOH or EtOH afford the isostructural complexes [Mn16O8(OR)4(OCN)4(O2CMe)12(hmp)6(ROH)2] (R = Me (1), Et (2)). The [Mn16(μ4-O)4(μ3-O)4(μ-OMe)4(μ3-OR)6(μ-OR)6]10+ core of representative complex 1 comprises a MnII 4MnIII 4 double-cubane subunit attached on either side to two symmetry-related MnIIMnIII 3 defective dicubanes. A similar reaction of Mn(O2CR)2·4H2O, hmpH, NaOCN and NEt3, but in solvent MeCN, led instead to the formation of [Mn18O14(O2CR)18(hmp)4(hmpH)2(H2O)2] (R = Me (3), Et (4)). Compounds 3 and 4 are very similar to each other and can be described as a central [MnIII 4(μ-O)6] rodlike subunit attached on either side to two symmetry-related [Mn7O9] subunits. Variable-temperature, solid-state dc and ac magnetic susceptibility studies revealed the presence of predominant antiferromagnetic exchange interactions in all compounds, and possible S = 2 or 1 (for 1 and 2) and S = 0 (for 3 and 4) ground state spin values. The combined results demonstrate the ability of cyanato groups to facilitate the formation of new polynuclear MnII/III complexes with structures different than these obtained from the use of the related azides. © 2015 Elsevier Ltd. All rights reserved. | en |
dc.source | Polyhedron | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84950124634&doi=10.1016%2fj.poly.2015.11.031&partnerID=40&md5=8395f35aa16297693631bda3e75daf59 | |
dc.subject | Manganese | en |
dc.subject | Magnetism | en |
dc.subject | 2-(Hydroxymethyl)pyridine | en |
dc.subject | Crystal structures | en |
dc.subject | Cyanates | en |
dc.title | Cyanate groups in higher oxidation state metal cluster chemistry: Mixed-valence (II/III) Mn16 and Mn18 clusters | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1016/j.poly.2015.11.031 | |
dc.description.volume | 108 | |
dc.description.startingpage | 131 | |
dc.description.endingpage | 142 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Χημείας / Department of Chemistry | |
dc.type.uhtype | Article | en |
dc.source.abbreviation | Polyhedron | en |
dc.contributor.orcid | Tasiopoulos, Anastasios J. [0000-0002-4804-3822] | |
dc.contributor.orcid | Alexandropoulos, Dimitris I. [0000-0002-8759-9495] | |
dc.contributor.orcid | Papatriantafyllopoulou, Constantina [0000-0002-5652-7747] | |
dc.contributor.orcid | Stamatatos, Theocharis C. [0000-0002-9798-9331] | |
dc.gnosis.orcid | 0000-0002-4804-3822 | |
dc.gnosis.orcid | 0000-0002-8759-9495 | |
dc.gnosis.orcid | 0000-0002-5652-7747 | |
dc.gnosis.orcid | 0000-0002-9798-9331 | |