655224-17-2Relevant academic research and scientific papers
Comparison of (triphenylphosphine)ruthenium complexes containing the 2,2′:6′,2″-terpyridine (trpy) and 4,4′,4″-tri-t- butyl-2,2′:6′,2″-terpyridine (trpy*) ligands
Billings, Susan B.,Mock, Michael T.,Wiacek, Kevin,Turner, Melinda B.,Kassel, W. Scott,Takeuchi, Kenneth J.,Rheingold, Arnold L.,Boyko, Walter J.,Bessel, Carol A.
, p. 103 - 115 (2003)
A comparison of (triphenylphosphine)ruthenium(II) complexes containing the 2,2′:6′,2″-terpyridine (trpy) and 4,4′,4″-tri-t- butyl-2,2′:6′,2″-terpyridine (trpy*) ligands was conducted. Electronic spectra and electrochemical data readily differentiated the trans- and cis-[RuCl2(trpy or trpy*)(PPh3)] complexes. 1H, 13C and 31P NMR assignments were made for each of the isomers as well as the trans-[RuCl(trpy*) (PPh3)2](PF6) complex. Notably, the 31P chemical shift differences between the trans- and cis-[RuCl 2(trpy*)(PPh3)] complexes were not dramatic and the 1H NMR spectra were found to be the best way for determining the position of the triphenylphosphine ligand relative to the terpyridyl ligand. X-ray crystal structure analyses confirmed the structures of the cis-[RuCl 2(trpy*)(PPh3)] and trans-[RuCl(trpy*) (PPh3)2]PF6 complexes. Similar π-stacking interactions occurred between the phenyl rings and the trpy* ligand in both complexes.
