Skip to main content
Article thumbnail
Location of Repository

Studies of lead(II) complexes of substituted calix[4]arenediquininones: The remarkable self assembly of a Novel Redox Active 3 D Channel Network.

By Paul D. Beer, Michael G.B. Drew, Philip A. Gale, Mark I. Ogden and Harold R. Powell


Several calix[4]diquinone–lead(II) complexes have been prepared. Two momonomeric complexes have been prepared with p-tert-butyl-(26,28-crown-5)calix[4]diquinone L1 and p-tert-butylcalix[4]diquinone bis(ethyl ether)L2, namely [PbL1(ClO4)2] and [PbL2(ClO4)2(H2O] wherein the metal atoms are 10-coordinate being bonded to the four oxygen atoms at the lower rim of the calixdiquinone and three perchlorate oxygen atoms together with three crown oxygen atoms or two carbonyl oxygen atoms and a water molecule respectively. <br/>By contrast the lead(II) complex with calix[4]diquinone bis(acid)L3 forms a unique trimeric [Pb9(L3– 2H)3(ClO4)6(OH)6] unit with crystallographic 3/m symmetry containing three unique Pb(II) atoms. One of these is to be found within the calix[4]diquinone bonded to the four oxygen atoms at the lower rim, two acid oxygen atoms, two perchlorate anions and a water molecule. The other two Pb(II) atoms are bonded to carbonylic oxygen atoms, water molecules and hydroxide ions. These trimeric units are interconnected via upper rim quinone oxygen–Pb(II) interactions to form a three-dimensional network containing channels of ca. 14 Å in diameter

Topics: QD
Year: 2000
OAI identifier:
Provided by: e-Prints Soton
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • (external link)
  • (external link)
  • Suggested articles

    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.