Synthesis and structure of rhenium carbonyl complexes bearing a saccharinate ligand
Md Hasanuzzaman, Mithun Chandra Sarker, Abdullah Al Mamun, Subas Rajbangshi, Shariff E. Kabir, Vladimir N. Nesterov, Michael G. Richmond, Shishir Ghosh
Abstract
Abstract Saccharin (sacH) reacts with [Re 2 (CO) 8 (NCMe) 2 ] at room temperature to afford dinuclear [Re 2 (CO) 8 (μ‐H)(μ‐sac‐κ N,O )] ( 1 ), which contains a bridging sac ligand coordinated to both rhenium centers using the nitrogen and ketonic oxygen atoms, and the mononuclear compounds [Re(CO) 5 (sac‐κ N )] ( 2 ) and cis ‐[Re(CO) 4 (NCMe)(sac‐κ N )] ( 3 ), both of which contain a sac ligand bonded to rhenium using only the nitrogen atom. Complex 3 that contains an MeCN ligand reacts with tri(2‐furyl)phosphine (PFu 3 ) at room temperature to yield cis ‐[Re(CO) 4 (PFu 3 )(sac‐κ N )] ( 4 ). The molecular structures of 1 – 4 have been established by X‐ray crystallography, and the bonding in compound 1 has been examined by electronic structure calculations.