Structural studies of phosphor-1,1-diselenoato Mn(I) and Re(I) complexes

Self-assembly of thiolato-bridged ester-functionalized Re(i)-based tetranuclear spiro-metallacyclophanes

“…The IR spectra of compounds 1-3 in CH 2 Cl 2 showed the characteristic bands of the fac-Re(CO) 3-core in an octahedrally coordinated metal center around the region of n 2024-1879 cm À1 . [90][91][92] The medium band displayed at n 1743 cm À1 was assigned to the ester CQO stretching of the ptpc ligand (Fig. S1, ESI †).…”

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

“…The IR spectra of compounds 1e5 in CH 2 Cl 2 exhibited carbonyl stretching at the region of 2027e1897 cm À1 characteristic of facial assembly of three terminal carbonyl groups (fac-Re(CO) 3 ) in an octahedrally coordinated metal centre [41]. 1 H NMR spectra of compounds 1e5 displayed appropriate signals for the pyridine ligands and aryl groups bonded to bridging selenium and the spectral data were included in Experimental section.…”

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

“…The IR spectrum of compounds 1-9 in CH 2 Cl 2 exhibited carbonyl stretching at the region of 2021-1900 cm À1 characteristic of facial assembly of three terminal carbonyl ligands (fac-Re(CO) 3 ) in an octahedrally coordinated metal centre [40]. 1 H NMR spectra of compounds 1-9 displayed appropriate signals for the pyridine ligands and aryl groups bonded to bridging sulphur and the data of the compounds were given in experimental section.…”

“…Crystal structure of 4 adopted dinuclear metallacyclic structure, where each rhenium in fac-Re(CO) 3 core is bonded to one pyridyl and two aryl sulphido group and hence Re centres attained a distorted octahedral geometry with C 2v symmetry [33,34,40] bondings were viewed in between C 3 of p-tolyl moiety and carbonyl group with a distance of 2.701 Å, and H 2 proton of pyridyl group bonding with another carbonyl group with a distance of 2.597 Å [59][60][61]. Crystal structure of 8 adopted a dinuclear metallacyclic structure, where each rhenium in fac-Re(CO) 3 core is bonded to one picoline and two benzyl sulphido group and hence Re centres attained a distorted octahedral geometry.…”