Novel mononuclear eta(5)-pentamethylcyclopentadienyl complexes of platinum group metals bearing pyrazolylpyridazine ligands: Syntheses and spectral studies

作者：Gupta Gajendra; Prasad Kota Thirumala; Rao Anna Venkateswara; Geib Steven J; Das Babulal; Rao Kollipara Mohan^*

来源：Inorganica Chimica Acta, 2010, 363(10): 2287-2295.

DOI：10.1016/j.ica.2010.03.052

• Pentamethylcyclopentadienyl
• Ruthenium
• Osmium
• Rhodium
• Iridium and pyrazolylpyridazine ligands

Condensation of 3,6-dichloropyridazine with 3,5-dimethylpyrazole in 1: 1 ratio yielded one side substituted pyrazolylpyridazine ligand 3-chloro-6-(3,5-dimethylpyrazolyl)pyridazine (L) while condensation of 3,6-dichloropyridazine with substituted pyrazoles in 1: 2 ratio yielded both side substituted pyrazolylpyridazine ligands such as 3,6-bis(pyrazolyl) pyridazine (L1), 3,6-bis(3-methylpyrazolyl) pyridazine (L2) and 3,6-bis(3,5-dimethylpyrazolyl) pyridazine (L3). A new series of cationic mononuclear complexes of the type [(eta(5)-Cp)M-a(L)(PPh3)]PF6, [(eta(5)-Cp*)M-b(L)Cl]PF6, [(eta(5)-Cp*)Ru(L')(PPh3)]PF6 and [(eta(5)-Cp*)M-b-(L')Cl](+) (where M-a = Ru, Os; M-b = Rh, Ir and L' = L1, L2, L3) bearing pyrazolylpyridazine and eta(5)-cyclopentadienyl ligands are reported. The complexes have been completely characterized by spectral studies. The molecular structures of representative complexes have been determined by single crystal X-ray crystallography.

• 出版日期2010-6-20