Control of the composition and crystal structure of exchange reaction products of rare-earth acetates with pivalic acid
作者： Irina G. Fomina , Andrey B. Ilyukhin , Andrey V. Gavrikov , Grygory G. Aleksandrov , Elena V. Fatyushina
DOI: 10.1016/J.ICA.2018.05.033
关键词:
摘要: Abstract The rare-earth metal(III) complexes [M2(piv)6(Hpiv)6] (monoclinic, P21/c, 1), [M2(piv)6(Hpiv)6]·Hpiv C2/c, 2), [M(piv)3]n (trigonal, P63/m, 3), and [(Hpiv)2(iPrOH)2Sm2(piv)6]·2Hpiv (triclinic, P-1, 4), where piv is (CH3)3CCO2−, were synthesized, their structures determined by single-crystal X-ray diffraction (SC-XRD). crystallization was shown to be controllable varying the nature of salting-out agent – non-coordinating organic solvent in M(OAc)3·4H2O–Hpiv system. following bulky single-phase samples obtained: dimers 1 or 2 with M = Pr, Nd, Sm, Eu, Gd using hexane C6H14; dimer 1D polymer 3 M = Y, Er, Yb EtOH; 4 M = Sm iPrOH. A reversible phase transition a commensurate modulated modification (P21/c) observed for crystals (Pn). magnetic properties 1a (Pr), 1b (Nd), (Sm), 1d (Eu), 1f (Dy), 1 g (Ho), 1 h (Er) investigated.
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