X-ray crystal structures of discrete and polymeric chiral silver complexes of monoterpenoid alkenes

X-ray crystal structures are reported for five silver(l) complexes of four monoterpenoid alkenes. Discrete mononuclear complexes of the chiral alkenes (1S)-(-)-alpha-pinene and (1S)-(-)-beta-pinene with silver perchlorate and silver hexafluorophosphate are described. The achiral diene gamma-terpinene forms a discrete mononuclear adduct with silver hexafluorophosphate and a two-dimensional polymeric network structure with silver triflate. The chiral diene (R)-(+)-limonene forms a one-dimensional chiral coordination polymer with silver hexafluorophosphate. In all structures the silver atom is eta(2)-bonded to the carbon-carbon bond(s) of the monoterpene with slightly longer bond distances to the more substituted carbon of the alkene moiety. (c) 2005 Elsevier B.V. All rights reserved.