Complexation of Tetrakis(acetato)chloridodiruthenium with Naphthyridine‐2,7‐dicarboxylate – Characterization and Catalytic Activity

Abstract

The reaction of calcium naphthyridine‐2,7‐dicarboxylate (Cadcnp) with Ru2(OAc)4Cl in water resulted in the formation of Ca[Ru2(dcnp)(OAc)3]2 (3). X‐ray crystal structural analysis of 3 confirmed its molecular structure and showed that the calcium ion binds to the lateral carboxylate groups of four neighboring anionic units of [Ru2(dcnp)(μ‐OAc)3] and two acetone molecules to form a two‐dimensional framework. The RuII–RuII valence state of the diruthenium core was supported by superconducting quantum interference device (SQUID) magnetometry [μeff (300 K) = 2.77 μB]. Complex 3 appears to be an efficient catalyst for the oxidative cleavage of olefins in aqueous media under mild conditions. Typically, the reaction of pulegone with NaIO4 in water catalyzed by 3 (1 mol‐%) at 45 °C afforded 3‐methyladipic acid quantitatively.

New insights into progressive ligand replacement from [Ru2Cl(O2CCH3)4]: synthetic strategies and variation in redox potentials and paramagnetic shifts

“…In this regard, it is worth mentioning the high stability of these formally mixed-valence species (actually, they are average valence species) and the variety of structural arrangements, 8 which provides these compounds with exceptional magnetic, 9–12 electronic, 13,14 and electrochemical 15–17 behaviours. These properties, as well as the ability of the diruthenium core to coordinate different chemical species through their axial, 13,18,19 equatorial 6,20–23 or peripheral positions, 24,25 make these compounds suitable for many potential applications, such as catalysis, 26–29 biological chemistry (anticancer activity and 30,31 interaction with proteins 27,32 ), or electronics (as electronic wires 33 ).…”

Ultrasound-assisted synthesis of water-soluble monosubstituted diruthenium compounds

“…Since mid-1960’s when Stephenson and Wilkinson [1] described the synthesis of the first mixed-valent [Ru 2 Cl(O 2 CR) 4 ] (R = alkyl) compound and Cotton and col [2] the first crystal structure, a big number of Ru 2 5+ paddlewheel diruthenium complexes with Ru-Ru bond order of 2.5 have been synthesized and characterized [3] , [4] , [5] , [6] , [7] , [8] . These compounds have attracted interest for their practical applications in catalysts [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , biomedicine [17] , [18] , [19] , [20] , biotechnology [21] , [22] , [23] , [24] , [25] , [26] or by their potential in material science due to their unique magnetic [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] , [36] and redox properties [37] .…”