Synthesis, characterization, and crystal structure of a hexaaza macrocyclic complex of lutetium(III)

Abstract

1127densation reactions to yield higher nuclearity cluster^.^.^^ This apparently occurred in these solutions also, and 1 mol of 1 combined with 1 mol of 0s3(CO),,(p3-S) t o yield 2. This was supported by t h e results of an independent reaction of 1 with Os3- (CO),o(p3-S), which gave 2 in 43% yield.Acknowledgment.

An Investigation of Lanthanum Coordination Compounds by Using Solid‐State 139La NMR Spectroscopy and Relativistic Density Functional Theory

“…Solid-state [43,44] Usually only the 139 La central transi- [33] square antiprism OB, OU Ln acac derivatives used as NMR shift reagents; [6][7][8] analogous Nd complex [75] 2 [La(bipyO) 4 [35] tricapped trigonal prism OU, OB numerous similar compounds [35] 4 [La(mal) 2 [36] monocapped square antiprism OB, OU polymeric carboxylate; similar Nd, [77,78] Eu, [79] and Gd [80] [40] monocapped pentagonal antiprism OM, OB crown-ether ligand used to complex metals; [90] analogous Ce, [91] Eu, [92] and Pr [93] [42] bicapped pentagonal prism NM, OB numerous similar complexes [95][96][97][98] [a] acac = acetylacetonate, bipyO = 2,2'-bipyridine-1,1'-dioxide, phen = 1,10-phenanthroline, mal = malonic acid, glut = glutamic acid, TEG = tetraethyleneglycol, N-macro = di(ethane-1,2-diyl)bis(pyridine-2,6-diacetimine).…”

Structure of a gadolinium hexaaza macrocycle complex with a Gd2(OAc)8 counterion

“…The condensation of diacetylpyridine and ethylenediamine in the presence of a lanthanide template ion results in a hexaaza macrocyclic complex (I) (Backer-Dirks, Gray, Hart, Hursthouse & N ' Schoop, 1979;Bombierie, Benetollo, Polo, De Cola, Smailes & Vallarino, 1986;; Arif, Backer-Dirks, Gray, Hart & * To whom correspondence should be addressed.…”

Interactions of trivalent lanthanide cations with tetradentate Schiff bases: New lanthanide(III) complexes from (1S,2S,N1E,N2E)–N,N′-bis(pyridin-2-ylmethylene)cyclohexane-1,2-diamine

“…This fact, in combination with the applications of lanthanide macrocyclic complexes emerging from biology and medicine have boosted research on these areas [2]. A large number of articles have been published on lanthanide complexes with the hexadentate Schiff base derived by the condensation of 2,6-diacetylpyridine and ethylenediamine [3][4][5][6][7][8][9][10][11][12][13][14]. These complexes are stable enough under physiological conditions.…”