One-pot synthesis of sulphur bridged dinuclear rhenium metallacycles via addition of S–S bond across Re–Re bond

Crystal structure of hexacarbonyl bis(μ2-2-methoxybenzenethiolato-κ2 S)pyridine(triphenylphosphane)dirhenium(I), C43H34NO8PS2Re2

“…water) to allow for the coordination of multidentate ligand systems [8,9]. This contribution forms part of a longterm study to investigate di erent aspects of middle and late transition metal centers when coordinated to O, N and S donor ligands [10][11][12][13][14][15][16][17][18][19]. The dinuclear structure (Figure) crystallized with one crystallographically independent molecule in the asymmetric unit.…”

Synthesis of selenium bridged metallacycles via oxidative addition of diaryl diselenide across Re–Re bond: Novel one-pot reaction approach

“…13 C NMR spectrum of compound 5 exhibited signals similar to that of compound 4 in addition to the CH 3 group signal observed at alkyl region. The UVeVis absorption spectra of 1e5 in CH 2 Cl 2 showed intense bands in the higher energy region at around l max 226e275 nm, that were assigned to pep* transition of the ligands [18,37,42,43]. Metallacycles 1e5 upon excitation at their respective ligand centred transitions exhibited moderate emissions observed at around l max 382e429 nm due to pep* excited state of the ligands [44,45].…”

“…Later, 2,2 0 -bisbenzimidizolate bridged 4-Phpy containing rhenium compounds have been reported by Dinolfo and co-workers [36]. Recently we have accomplished the sulphur bridged dinuclear rhenium metallacycles from oxidative addition reaction of diaryl disulphides to rhenium carbonyl with monodendate pyridine ligands [37]. Herein, we report on the novel one-pot synthesis of selenium bridged neutral metallacycles [L(CO) 3 Re(m-SeR) 2 Re(CO) 3 L] (L ¼ pyridine ligand) (1e5) via oxidative addition of SeeSe bond across ReeRe bond by a facile reaction of rudimentary metal precursor with diaryl diselenide and monodentate pyridine ligands.…”

Synthesis of ReItricarbonyl complexes with various sulfur- and oxygen-donating ligands: crystal structures of two ReIdinuclear structures bridged by S atoms

“…These values differ significantly between the two compounds and are most likely caused by the bridging ligand in (1) that is sterically prevented from forming a third bridge. The rheniumcarbonyl and rhenium-sulfur bond lengths of (1) and (2) are in normal ranges (Alberto & Schubiger, 1989;Alberto et al, 1996Schutte et al, 2012;Brink et al, 2014;Makris et al, 2012;Nú ñ ez-Montenegro et al, 2014;Herrick et al, 2009;Vanitha et al, 2010).…”

“…Sulfur tends to form bridges because it is a soft ligand. A search of the Cambridge Structural Database (CSD; Groom et al, 2016) revealed three dinuclear Re I tricarbonyl structures, where three sulfur bridges [one aliphatic (LEWMEF;Nefedov et al, 1993), one benzylic (PESPOS; Calhorda et al, 1993) and one S-CO-Ph (CSTBRE; Mattes & Weber, 1979)] are formed between the two metal centres, and seven dinuclear Re I tricarbonyl structures with two sulfur bridges with the S atoms in these bridges being saturated aliphatic S atoms [HEPLOE and HEPLUK (Manimaran et al, 2006), IRUQES and IRUQIW (Gupta et al, 2011), SUGNUD (Benkstein et al, 1998), and VUVNUW and VUVPEI (Vanitha et al, 2010)], similar to the case of (1). These sulfur bridges are thiobenzilic and thioaliphatic in nature, in contrast to a phenolic S atom which would only be able to form one bond, viz.…”