Interaction of organic complexes of chromium, molybdenum and tungsten with cisα, β-dinitrostilbene

Interaction of weak π-acids - cic - α, β -dinitrostilbene (DNS) and cis - α - nitrostilbene (NS) with metalloorganic complexes (MOC) of the general formula (CO)4ML2 (M-Cr, Mo, W; L-pyridine, diphenylphosphinomethane, diphenylphosphinoethane), has been consdered. During MOC interaction with DNS and NS no changes of CO bands in IR spectra of mixtures or chemical shifts in NMR spectra are observed, thoug actually formation of donor-acceptor complexes takes place, at that, metalloorganic compounds donit change, and nitrostilbene undergoes cis-trans isomerization. A scheme of DNS and MOC interaction, taking into account charge transfer between components, cis-trans-isomerization of dinitroolefine and decomposition of donor-acceptor complex with MOC liberation, which is able to be bound with yet unchanged molecules of cis-olefine, has been suggested. Conversion degree is the higher, the less donor properties of ligand in MOC are expressed