Ruthenium(II) complexes with chelated RCE2– ions (E = O or S) bearing 1–(diphenyl-phosphino)–2–(2–pyridyl)ethane (ppye). Crystal structures of cis,trans–[Ru(RCO2)-(ppye)2] PF6 (R = H or CH3)

A. Del Zotto

E. Rocchini

F. Pichierri

P. Rigo