Hydrogen bonds mediated magnetism in Cu(bmen)2Pd(CN)4

Preparation, spectroscopic and magnetic characterization of Cu(cyclam)M(CN)4 complexes exhibiting one-dimensional crystal structures (cyclam = 1,4,8,11-tetraazacyclotetradecane, M = Ni, Pd, Pt)

“…On the other hand, very similar HB topology to that found for (1), (2) and (3) was observed in the isostructural complexes Cu(bmen) 2 M(CN) 4 (M = Ni, Pd, Pt; bmen = N,N 0 -dimethyl-1,2-diaminoethane), in which the amine type ligand bmen provides only two hydrogen atoms, the remaining two being replaced by methyl groups [11,12,37]. As an example, we can mention that the NÁÁÁN distances in Cu(bmen) 2 Ni(CN) 4 are in the range 3.119(2)-3.214(2) Å , while the CuÁÁÁCu distance within the hydrogen-bonded pathway is 8.447(1) Å and the CuN 4 planes in neighbouring cations linked by hydrogen bonds form an angle of 59.25(2)° [12].…”

“…As an example, we can mention that the NÁÁÁN distances in Cu(bmen) 2 Ni(CN) 4 are in the range 3.119(2)-3.214(2) Å , while the CuÁÁÁCu distance within the hydrogen-bonded pathway is 8.447(1) Å and the CuN 4 planes in neighbouring cations linked by hydrogen bonds form an angle of 59.25(2)° [12]. Similar values were observed in the Pd and Pt analogues [11,37].…”

“…Weak AF interactions were also [31]. In the analogous Cu(bmen) 2 Pd(CN) 4 the susceptibility fitted the CurieWeiss law, too, with values of g = 2.15(1) and h = -3.2(1) K confirming the presence of weak AF interactions; the magnetic ordering, as indicated by specific heat measurements, was observed at 0.24 K [11]. It is suggested that in order to detect magnetic ordering in all three compounds (1)-(3), low temperature studies in the millikelvin region are necessary.…”

“…complex cations (L-L is a chelating N-donor ligand) [10][11][12]. As a continuation of our studies, we have prepared complexes in which the two chelating (L-L) ligands are replaced by one macrocyclic ligand, namely cyclam (cyclam = 1,4,8,11-tetraazacyclotetradecane) (Scheme 1), in order to explore how such a change of ligand will influence the HB system formed.…”

Two dimensional heteronuclear complexes with cyanide and 4-aminomethylpyridine ligands

“…In this study, we define syntheses, spectral (FTIR and Raman), thermal and elemental analyses of the complexes [Cd(NH 3 ) 2 (l-ampy)Ni(l-CN) 2 interest in the fields of magnetic [1][2][3], electrochemical [4], spin-crossover phenomena [5][6][7], and microporous features [8,9]. These polymeric metal complexes are especially macromolecules formed by metal-metal or metal-ligand-metal bridge connections in one, two or three dimensions [10][11][12].…”