ORGANOMANGANESE PHOSPHORANEIMINATO COMPLE XES WITH HETEROCUBANE STRUCTURE

The organomanganese phosphoraneiminato complexes [MnR(NPEt(3))](4) (R= Me, C=C-Ph, C=C-Tol, C=C-CMe(3), C=C-SiMe(3)) with heterocubane struct ures have been prepared by reaction of the bromo derivative [MnBr(NPEt (3))](4) with the corresponding lithium reagents LiR in THF/hexane sol ution, forming shiny red, very reactive compounds which are well solub le in hydrocarbons. They were characterized by mass spectroscopy, IR s pectroscopy and by crystal structure determinations. According to thes e the compounds form nearly perfect Mn4N4 heterocubane frameworks with mu(3)-N bridges of the phosphoraneiminato groups with Mn-N bond lengt hs of 214.5 pm in average which leads to Mn ... Mn contacts of 299.5 p m in average. The. organic residues R are terminal bonded with Mn-C di stances Mn-Me of 219.5 pm and Mn-C=C-R of 207.6 pm in average.