Binuclear complexes of Ni, Cu, and Mn have been synthesized and characterized. The reaction of bis(salicylaldehyde) complexes of nickel(II) and copper(II) with m-xylylenebis(2-(l,3-propanediamine)) (3) result in the formation of NinL (5) and CuuL (7), respectively, where L = zn-xylylenebis(2-(l,3-propanedisalicylaldimine))(2-). The reaction of manganese(II) acetate with salicylaldehyde and 3 results in the formation of MnnL (6a). The nickel complex, 5, undergoes a quasireversible two-electron transfer at -1.47 V vs. SCE attributable to the nickel(II)-nickel(I) couple. Complex 5 is diamagnetic and has been characterized by 'H NMR spectroscopy while the binuclear nickel(I) complex ( 11) is paramagnetic. The binuclear nickel(I) complex can be generated from 5 both electrochemically and chemically and has been shown by infrared analysis to form adducts of CO, MeNC, and n-BuNC. The EPR spectrum of a frozen THE solution of the bis(nickel(I)) complex ( 11) is consistent with the existence of noninteracting metal-centered radicals. The carbonyl and zi-BuNC adducts of 11 are EPR silent. Magnetic susceptibility measurements by the Faraday method show the manganese and copper complexes (6a and 7) have solid-state room-temperature moments of 5.47 and 1.92 µß/metal center, respectively, while the solution magnetic moment of the binuclear copper complex ( 7) is found by the Evans method to be 1.49 µß/copper center. This reduced magnetic moment relative to the moment for mononuclear Cu(salprn) (1.79 µ ) may indicate a weak magnetic interaction between the two copper centers in the binuclear
Der durch 4:1‐molare Umsetzung von 2‐Pyridincarbaldehyd mit m‐Xylylen‐bis‐[2‐(1,3‐propandiamin)] in Isopropanol entstehende Titelligand reagiert mit Ni‐, Co(II)‐ oder Cu(Il)‐chlorid unter Bildung der paramagnetischen, tetragonal verzerrten, sechsfach‐koordinierten Zweikernkomplexe (Ia).
Der durch 4:1‐molare Umsetzung von 2‐Pyridincarbaldehyd mit m‐Xylylen‐bis‐[2‐(1,3‐propandiamin)] in Isopropanol entstehende Titelligand reagiert mit Ni‐, Co(II)‐ oder Cu(Il)‐chlorid unter Bildung der paramagnetischen, tetragonal verzerrten, sechsfach‐koordinierten Zweikernkomplexe (Ia).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.