Abstracts Category : Other

Synthesis Structures and Properties of Ruthenium PianoStool Complexes

by Peng Yi

This research investigated the synthesis of aseries of new C3v RuII complexes with pyridine or pyridyl ligands.Commercial ruthenium chloride dimers ([Ru(Bz)Cl2]2, [Ru(Cym)Cl2]2,[Ru(HMB)Cl2]2) were initially used to synthesise the importantprecursors [Ru(Bz),(N2H4)3][BPh4]2 (1), [Ru(Cym),(N2H4)3][BPh4]2 (6)and [Ru(HMB),(N2H4)3][BPh4]2 (12), which was followed by thesynthesis of a series of Ruthenium tris-pyridyl complexes thatincluded [Ru(Cym),(ein)3][BPh4]2 (9). Investigations into differentpurification methods, which included recrystallisation in differentsolvent combination systems, alumina column and sephadex columnrevealed that the most efficient method for a silica column waseluant DCM:acetone(dry)= 95:5 or DCM:acetonitrile (dry)= 95:5. Arange of novel compounds was successfully made. Complexes[Ru(Bz),(N2H4)3][BPh4]2 (1), [Ru(Bz),(py)3][BPh4]2 (2),[Ru(Cym),(N2H4)3][BPh4]2 (6), [Ru(Cym),(py)3][BPh4]2 (7),[Ru(Cym),(pic)3][BPh4]2 (8) were all known compounds. Compounds[Ru(Bz),(pic)3][BPh4]2 (3), [Ru(Bz),(ein)3][BPh4]2 (4),[Ru(Bz),(ppy)3][BPh4]2 (5), [Ru(Cym),(ein)3][BPh4]2 (9),[Ru(Cym),(ppy)3][BPh4]2 (10), [Ru(HMB),(N2H4)3][BPh4]2 (12),[Ru(HMB),(py)3][Cl]2 (13), [Ru(HMB),(pic)3][Cl]2 (14),[Ru(HMB),(ein)3][Cl]2 (15) and [Ru(HMB),(ppy)3][BPh4]2 (16) are allnew complexes. The compounds (1-10) were fully characterised byelectronic spectroscopy and electrochemical methods. Eight crystalstructures of [Ru(Bz),(N2H4)3][BPh4]2 (1), [Ru(Bz),(py)3][BPh4]2 (2),[Ru(Cym),(N2H4)3][BPh4]2 (6), [Ru(py)3(DMF)3][BPh4]2 (11),[Ru(HMB),(N2H4)3][BPh4]2 (12), [Ru(HMB),(py),(Cl)2] (17),[Ru(HMB),(pic),(Cl)2] (18) and [Ru(HMB),(pic),(Cl)2]CH2Cl2 (19) wereobtained as well.Advisors/Committee Members: WHITELEY, MARK MW, Whiteley, Mark, Coe, Benjamin.