Chlorido(dimethyl 2,2′-bipyridine-4,4′-dicarboxylate-κ²N,N′)(η⁵-pentamethylcyclopentadienyl)rhodium(III) chloride 1-hydroxypyrrolidine-2,5-dione disolvate

Abstract

The title complex, [Rh(C10H15)Cl(C14H12N2O4)]Cl·2C4H5NO3, has been synthesized by a substitution reaction of the precursor [bis(2,5-dioxopyrrolidin-1-yl) 2,2'-bipyridine-4,4'-dicarboxylate]chlorido(pentamethylcyclopentadienyl)rhodium(III) chloride with NaOCH3. The Rh(III) cation is located in an RhC5N2Cl eight-coordinated environment. In the crystal, 1-hydroxypyrrolidine-2,5-dione (NHS) solvent molecules form strong hydrogen bonds with the Cl(-) counter-anions in the lattice and weak hydrogen bonds with the pentamethylcyclopentadienyl (Cp*) ligands. Hydrogen bonding between the Cp* ligands, the NHS solvent molecules and the Cl(-) counter-anions form links in a V-shaped chain of Rh(III) complex cations along the c axis. Weak hydrogen bonds between the dimethyl 2,2'-bipyridine-4,4'-dicarboxylate ligands and the Cl(-) counter-anions connect the components into a supramolecular three-dimensional network. The synthetic route to the dimethyl 2,2'-bipyridine-4,4'-dicarboxylate-containing rhodium complex from the [bis(2,5-dioxopyrrolidin-1-yl) 2,2'-bipyridine-4,4'-dicarboxylate]rhodium(III) precursor may be applied to link Rh catalysts to the surface of electrodes.

Mono- and dinuclear CuII complexes of the benzyldipicolylamine (BDPA) ligand: crystal structure, synthesis and characterization

“…Among the anions, two geometrically equivalent triflates bridge [Cu(BDPA)(triflate)] units to form a Cu II dimer. The Cu-N bond lengths are in the range 1.959 (6) to 2.027 (5) Å (Table 4) and these values are comparable with literature values (Dharmalingam et al, 2012(Dharmalingam et al, , 2014Dharmalingam & Yoon, 2013;Sivanesan et al, 2013). In the bridging triflate anion, the Cu-O distances of the axial and equatorial O atoms are 2.641 (6) and 1.997 (5) Å , respectively.…”