Neutral complexes of the type AuX (PEt,)(X= Br, CN, SCN) were prepared and characterized by infrared and Raman spectroscopy, with the major emphasis on the assignment of the gold-ligand vibrations and discerning the mode of bonding for the ambidentate ligands. The photosensitive cationic complexes [(Au (SMe2)(PEt,)] PF6 and {Au [SC (NH~)~](PE~,)~ CI in addition to [Au (OH,)(PEt,)] NO, and (pS)[(PEt,) Au], were also prepared and characterized ...