Mohammad El-khateeb, Nather Al-rawashdeh, Qutaiba Abu-salem

Department of Chemistry, Jordan University of Science and Technology,
P.O. Box 3030, Irbid 22110, JORDAN
 

ABSTRACT

New molybdenum and tungsten complexes containing tert-butylcyclopentadienyl ligand (Cp'= tBu-C5H4) have been prepared and characterized. The reaction of M(CO)3(CH3CN)3 with tert-butylcyclopentadiene provide improved route to the metal-metal bond compounds [Cp'M(CO)3]2 (M= Mo (Ia), W (Ib)) in good isolated yields. New examples of mononuclear complexes have also been prepared. The yellow complexes Cp'M(CO)3R (R= CH3, CH2C6H5) (IV) and [Cp'Mo(CO)3SO2(p-C6H4X)] (V) (X= CH3, Cl) have been prepared from the reaction of the anions, [Cp'M(CO)3]?, with alkyl halides or arylsulfonyl chlorides in THF solvent, respectively. Protonation of the anion [Cp'M(CO)3]? with glacial acetic acid, which gave the hydride complexes, followed by stirring in CCl4 / THF or refluxing with CH3I in benzene produce the corresponding halides Cp'M(CO)3Cl (II) or Cp'M(CO)3I (III), respectively.