Summary: Synthesis and X-ray structures of silver and gold guanidinate-like
complexes. A Au(II) complex with a 2.47 Å Au­Au distance
Michael D. Irwin, Hanan E. Abdou, Ahmed A. Mohamed and John P. Fackler, Jr.*
Laboratory for Molecular Structure and Bonding, Department of Chemistry, Texas A&M University, College
Station, Texas 77843-3255, USA. E-mail: fackler@mail.chem.tamu.edu; Fax: (979) 845-2373; Tel: (979)
845-0648
Received (in Purdue, IN, USA) 12th August 2003, Accepted 24th September 2003
First published as an Advance Article on the web 24th October 2003
The structures of the tetranuclear silver(I), [Ag4(hpp)4], and
the dinuclear gold(II), [Au2(hpp)2Cl2], (hpp =
1,3,4,6,7,8-hexahydro-pyrimido[1,2-a]pyrimidinate) guani-
dinate-like bases are reported and show a silver­silver
distance of 2.8614(6) Å and a gold­gold distance of 2.4752(9)
Å, the shortest Au­Au bond heretofore reported.
Previous work in our laboratory involving gold-nitrogen
chemistry has led to the structural characterization of the
homogenous group (11) pyrazolates, [M(m-3,5-Ph2pz)]3, M =
CuI, AgI, AuI which includes the hexanuclear product [Au6(m-
3,5-Ph2pz)6].1,2 During recent studies of the chemistry of these
metal pyrazolates as materials for the synthesis and study of

Source: Abdou, Hanan E. - Department of Chemistry, Texas A&M University

Collections: Chemistry