Expanding the family of C,N-chelated organotin(IV) pseudohalides: Synthesis and structural characterization

摘要: Abstract A set of tri- and diorganotin(IV) pseudohalides bearing the 2-(N,N-dimethylaminomethyl)phenyl-as a C,N-chelating ligand (LCN) has been prepared structurally characterized. Triorganotin(IV) type LCNR2SnX [R = n-Bu, X = NCO (1a), NCS (1b), NCSe (1c), CN (1d); R = Ph, (2a), (2b), (2c), (2d)] (LCN)2(n-Bu)SnX [X = NCO (3a), (3b), (3c), (3d)] are monomeric both in solution solid state. The central tin atom these species is five-coordinated state with distorted trigonal bipyramidal geometry. Monomeric (LCN)2SnX2 (4a), (4b), (4c), (4d)] contain six-coordinated atoms heavily octahedral geometry due to presence two LCN units. Finally, we have found that LCN(n-Bu)Sn(NCS)2 (5) presumably dimeric CDCl3 THF-d8 or DMSO-d6 while it forms infinite linear polymer via thiocyanate bridges. According IR, multinuclear NMR spectroscopy XRD analysis, was pseudohalide ligands N C Y (Y = O, S, Se) bound nitrogen substituent act as common cyanide (i.e. binds carbon). DFT calculations were performed for selected compounds (2a, 2b, 2d 4d) further support our conclusions about nature Sn-pseudohalide bonds. Compound LCNSnPhI2 (6), which scope this work well structure non-equivalent iodine atoms.