Synthesis, Crystal Structure Properties of {μ-Nitrato-[N,N′-ethylene-bis(3-methoxysalicylideneimin) diaqua nitrato Cu(II)La(III)]nitrat}

Şenyüz, Nuray; Yüksektepe, Çiğdem; Batı, Hümeyra; Çalışkan, Nezihe; Büyükgüngör, Orhan

doi:10.1007/s10870-010-9780-0

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…The La-O distances have common values, varying between 2.448(6) and 2.797(6) Å. 35,36 Two cyano groups of an octacyanomolybdate(V) unit complete the coordination sphere of the lanthanum atom, the bond length being La1-N3 = 2.651(7) Å. The angles associated with the four cyano bridges deviate from linearity: Cu1 a -N6-C24 = 132.2(3)°, La1-N3-C20 = 153.2(7)°.…”

Section: Description Of Structures For Compounds 8-14 (Type 2)mentioning

confidence: 99%

Magneto-structural variety of new 3d–4f–4(5)d heterotrimetallic complexes

et al. 2015

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Three families of heterotrimetallic chains (type 1-type 3), with different topologies, have been obtained by reacting the 3d-4f complexes, [{Cu(L(1))}xLn(NO3)3] with x = 1 or 2, formed in situ by the reaction of Schiff-base bi-compartmental [Cu(II)(L(1))] complexes and lanthanide(iii) salts, with (NHBu3)3[M(CN)8] (M = Mo(V), W(V)). For type 1 series of compounds, 1-D coordination polymers, with the general formula [{Cu2(valpn)2Ln}{M(CN)8}]·nH2O·mCH3CN (where H2valpn = 1,3-propanediylbis(2-iminomethylene-6-methoxy-phenol), result from the association of trinuclear {CuLn(III)} moieties and [M(V)(CN)8](3-) anions acting as tri-connecting spacers [Ln = La (1), Ce (2), Eu (3), Tb (4), Ho (5), M = Mo; Ln = Tb (6), Ho (7), M = W; m = 0, n = 1.5 (7) and 2 (1-4, 6); n = 1, m = 1 (5)]. The type 2 family has the general formula [{Cu(valdp)Ln(H2O)4}{M(CN)8}]·2H2O·CH3CN (where H2valdp = 1,2-propanediylbis(2-iminomethylene-6-methoxy-phenol)) and also consists of heterotrimetallic chains involving binuclear {Cu(II)Ln(III)} units linked to [M(CN)8](3-) anions coordinating through two cyano groups [Ln = Gd (8), Tb (9), Dy (10); M = Mo; Ln = La (11), Gd (12), Tb (13), Dy (14); M = W]. With large Ln(III) ions (La(III) and Pr(III)), the type 3 family of heterotrimetallic compounds are assembled: [{Cu2(valdp)2Ln(H2O)4}{Mo(CN)8}]·nCH3OH·mCH3CN, n, m = 0, Ln = La (15); n = m = 1, Pr (16), in which the trinuclear {CuLn(III)} nodes are connected to [Mo(V)(CN)8](3-) anions that act as tetra-connecting spacers. For Tb(III) derivatives of the type 1 (compounds 4 and 6), the DC magnetic properties indicate a predominant ferromagnetic Cu(II)-Tb(III) interaction, while the AC magnetic susceptibility (in the presence of a static magnetic field, HDC = 3000 Oe) emphasize the slow relaxation of the magnetization (Ueff/kB = 20.55 K and τ0 = 5.5 × 10(-7) s for compound 4, Ueff/kBT = 15.1 K and τ0 = 1.5 × 10(-7) s for compound 6). A predominant ferromagnetic Cu(II)-Ln(III) interaction was also observed in the type 2 series (compounds 8-10 and 12-14) as a result of the magnetic coupling between copper(ii) and lanthanide(iii) ions via the phenoxo-bridge. The magnetic behavior for the La(III) derivatives reveals that weak ferromagnetic interactions are also operative between the Cu(II) and the 4d/5d centers.

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Section: Description Of Structures For Compounds 8-14 (Type 2)mentioning

confidence: 99%