The molecular structure of 1,10-phenanthroline-5,6-dione has been determined by X-ray diffraction analysis. The compound reacts with the tetrachlorides of Group 4 metals affording adducts of general formula [MCl4(C12H6N2O2)] (M = Ti, Zr or Hf) and [(MCl4)2(C12H6N2O2)] (M = Ti or Hf), N,N- and N,N,O,O-co-ordinated respectively. The compound [HfCl4(C12H6N2O2)] is reactive towards TiCl4 affording the bimetallic compound [Cl4Hf(C12H6N2O2)- TiCl4]. The reaction of the dione with bis-cyclopentadienyl derivatives of titanium(), zirconium(), [MCp2(CO)2], and vanadium(), VCp2, affords derivatives O,O-co-ordinated to the MCp2 moiety. By reaction of [TiCp2- (C12H6N2O2)] with [TiCp2(CO)2] the bimetallic derivative [(TiCp2)2(C12H6N2O2)] is obtained, which is suggested to contain two TiCp2 fragments, O,O- and N,N-co-ordinated to 1,10-phenanthroline-5,6-dione. The [MCp2- (C12H6N2O2)] (M = Ti, Zr or V) derivatives react with MCl4 (M = Ti or Hf) to give [Cp2M(C12H6N2O2)MCl4] bimetallics.
|Autori:||CALDERAZZO F; F. MARCHETTI; G. PAMPALONI; V. PASSARELLI|
|Titolo:||Coordination properties of 1,10-phenanthroline-5,6-dione towards Group 4 and Group 5 metals in low- and high oxidation states|
|Anno del prodotto:||1999|
|Appare nelle tipologie:||1.1 Articolo in rivista|