Rare nuclearities in Ni(ii) cluster chemistry: a Ni₁₁ cage from the first use of N-salicylidene-2-amino-5-chlorobenzoic acid in metal cluster chemistry

Abstract

The first use of N-salicylidene-2-amino-5-chlorobenzoic acid in metal cluster chemistry has afforded a new NiII11 cage consisting of Ni4 squares and Ni3 triangles.

‘Metal Complexes as Ligands’ for the Synthesis of Coordination Polymers: A MnIII Monomer as a Building Block for the Preparation of an Unprecedented 1-D {MnIIMnIII}n Linear Chain

“…The 1-D polymer 2 has a linear chain conformation and consists of alternating Mn II and Mn III paramagnetic metal ions, which appear to be weakly and antiferromagnetically coupled through the syn-anti carboxylate groups of sacb 2− ligands. These results demonstrate, for the first time, the ability of sacbH 2 to stabilize redox-active 3d-metal ions in moderate to high oxidation states, thus complementing our previous successful results from the employment of this ligand in Ni II and Dy III coordination chemistry [20,21,46].…”

“Ligands-with-Benefits”: Naphthalene-Substituted Schiff Bases Yielding New NiII Metal Clusters with Ferromagnetic and Emissive Properties and Undergoing Exciting Transformations

“…nacbH2 was prepared in a similar manner as sacbH2. 11,12 Safety note: Perchlorate salts are potentially explosive; such compounds should be synthesized and used in small quantities, and treated with utmost care at all times.…”

“…[10][11][12] We have thus tried to understand the reasons of such coordination differences, which would also allow us to tentatively interpret the structural variations between the Ni II /nacb 2and Ni II /sacb 2products ( Figure S2). In all the reported Ni II /sacb 2compounds, [10][11][12] the ligand's phenyl rings are arranged in an average angle of ~47° from each other. However, the analogous average angle between the naphthalene and phenyl rings of nacb 2--related products is ~34°, significantly smaller than that of sacb 2-.…”

A Ni11 Coordination Cluster from the Use of the Di-2-Pyridyl Ketone/Acetate Ligand Combination: Synthetic, Structural and Magnetic Studies

“…While the number of high-nuclearity, non-organometallic complexes of nickel(II) with O-and/or Nbased ligands and without metal-metal bonding continues to grow rapidly [11,15,[29][30][31][32][33] (the record nuclearity is 26 [29]), some nuclearities remain rare. Undecanuclear nickel(II) complexes are particularly rare, and complex 1 thus becomes a new member of the small family of Ni11 clusters [34][35][36][37][38]; the metal topology and core of 1 are novel. (Figure 4).…”

“…This alignment, based on the above discussion, leads to the S = 3 ground state. In order to provide a qualitative explanation of the magnetic properties of 1, we assume as main interactions those provided by the monatomic oxygen bridges, which can be analyzed based on wellestablished magnetostructural correlations in nickel(II) complexes [11][12][13][14][15]18,[20][21][22]34,[39][40][41][42][43][44][45][46][47][48][49]. The linkage between the external cubanes and the central Ni3 subunit involves four Ni-O(hydroxido)-Ni units (Figure 3) with bond angles in the 117.1°-125.3°; these angles are expected to propagate antiferromagnetic exchange interactions.…”