Photochemical synthesis and spectroscopic studies of 3, 5-alkyl/aryl substituted-tetrahydro-2H-1,3,5-thiadiazine-2-thione and their complexes with M(CO)4(2:2- NBD) [M = Cr, Mo and W] as M(CO)4 transfer reagent

摘要

Fifteen new complexes, [M(CO)4(L)2] [M=Cr; Mo; W]; [L= met-DTTT; et-DTTT; n-pr-DTTT; ph-DTTT and benz-DTTT] have been synthesized by the photochemical exchange reaction of [(η2:2- NBD)M(CO)4] (M= Cr, Mo and W) with 3,5-dimethyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione (met-DTTT), 3,5-diethyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione (eth-DTTT), 3,5-di-n-propyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione (n-pr-DTTT), 3,5-diphenyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione (ph-DTTT), and 3,5-dibenzyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione (benz-DTTT). The new complexes have been characterized by elemental analysis, FTIR, 1H NMR spectroscopy. The spectroscopic studies show that DTTT behaves as a monodentate ligand coordinating via the sulfur (C=S) donor atom.