000070766 001__ 70766
000070766 005__ 20200221144304.0
000070766 0247_ $$2doi$$a10.1039/c6dt03511f
000070766 0248_ $$2sideral$$a105981
000070766 037__ $$aART-2016-105981
000070766 041__ $$aeng
000070766 100__ $$aEfthymiou, C.G.
000070766 245__ $$aIn search of molecules displaying ferromagnetic exchange: multiple-decker Ni-12 and Ni-16 complexes from the use of pyridine-2-amidoxime
000070766 260__ $$c2016
000070766 5060_ $$aAccess copy available to the general public$$fUnrestricted
000070766 5203_ $$aThe use of pyridine-2-amidoxime (pyaoxH(2)) in Ni chemistry has provided access to a dodecanuclear complex and a hexadecanuclear Ni cluster, namely [Ni-12(pyaox)(6)(pyaoxH)(6)(MeOH)(2)Cl-2] Cl-4 center dot 5MeOH (1.5MeOH) and [Ni-16(pyaox)(8)(pyaoxH)(8)(MeOH)(4)](SO4)(4)center dot 10H(2)O center dot 26MeOH (2.10H(2)O center dot 26MeOH). Complex 1.5MeOH was isolated by the reaction of NiCl2 center dot 6H(2)O, pyaoxH(2) and NaOMe in a 1:1:2 molar ratio in MeOH in 60% yield. Treatment of NiSO4 center dot 6H(2)O with pyaoxH(2) and NEt3 in a 1:1:2 molar ratio in MeOH afforded 2.10H(2)O center dot 26MeOH in good yield (65%). The two compounds display a multi-decker configuration based on stacked Ni-4 layers, {Ni-4(pyaox)(2)(pyaoxH)(2)}(x)(2+) (x = 3, 1.5MeOH; x = 4, 2.10H(2)O center dot 26MeOH); each deck consists of two square planar and two octahedral Ni-II centres. The number of decks observed in 1.5MeOH and 2.10H(2)O center dot 26MeOH depends on the nature of the inorganic anion that is present in the reaction system, which provides elements of synthetic control towards new high nuclearity Ni-II species. 2.10H(2)O center dot 26MeOH is the first structurally characterized complex of any metal displaying a quadruple-decker configuration, being also the highest nuclearity metal cluster bearing pyaoxH(2) and the highest nuclearity Ni-II cluster with any type of 2-pyridyl oxime. Each cluster cation displays ferromagnetic exchange between the octahedral Ni-II ions resulting in a spin ground state of S = 6 for 1 and S = 8 for 2. Magnetothermal studies have been performed and discussed for both clusters.
000070766 536__ $$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2015-68204-R
000070766 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000070766 590__ $$a4.029$$b2016
000070766 591__ $$aCHEMISTRY, INORGANIC & NUCLEAR$$b7 / 46 = 0.152$$c2016$$dQ1$$eT1
000070766 592__ $$a1.229$$b2016
000070766 593__ $$aInorganic Chemistry$$c2016$$dQ1
000070766 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000070766 700__ $$aCunha-Silva, L.
000070766 700__ $$aPerlepes, S.P.
000070766 700__ $$aBrechin, E.K.
000070766 700__ $$aInglis, R.
000070766 700__ $$0(orcid)0000-0002-8028-9064$$aEvangelisti, M.$$uUniversidad de Zaragoza
000070766 700__ $$aPapatriantafyllopoulou, C.
000070766 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000070766 773__ $$g45, 43 (2016), 17409-17419$$pDalton Trans.$$tDalton Transactions$$x1477-9226
000070766 8564_ $$s350319$$uhttps://zaguan.unizar.es/record/70766/files/texto_completo.pdf$$yVersión publicada
000070766 8564_ $$s108878$$uhttps://zaguan.unizar.es/record/70766/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000070766 909CO $$ooai:zaguan.unizar.es:70766$$particulos$$pdriver
000070766 951__ $$a2020-02-21-13:34:11
000070766 980__ $$aARTICLE